distill-template/dist/template.js

(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
    typeof define === 'function' && define.amd ? define(['exports'], factory) :
    (factory((global.dl = global.dl || {})));
}(this, (function (exports) { 'use strict';

var html = function(dom) {
  if (!dom.querySelector("html").getAttribute("lang")) {
    dom.querySelector("html").setAttribute("lang", "en");
  }

  var head = dom.querySelector("head");

  if (!dom.querySelector("meta[charset]")) {
    var meta = dom.createElement("meta");
    meta.setAttribute("charset", "utf-8");
    head.appendChild(meta);
  }
  if (!dom.querySelector("meta[name=viewport]")) {
    var meta$1 = dom.createElement("meta");
    meta$1.setAttribute("name", "viewport");
    meta$1.setAttribute("content", "width=device-width, initial-scale=1");
    head.appendChild(meta$1);
  }
};

var base = "html {\n  font: 400 16px/1.55em -apple-system, BlinkMacSystemFont, \"Roboto\", Helvetica, sans-serif;\n  /*background-color: hsl(223, 9%, 25%);*/\n  -ms-text-size-adjust: 100%;\n  -webkit-text-size-adjust: 100%;\n  text-size-adjust: 100%;\n}\nbody {\n  margin: 0;\n  /*background-color: hsl(223, 9%, 25%);*/\n}\n\na {\n  color: #004276;\n}\n\nfigure {\n  margin: 0;\n}\n\nh1 {\n  font-family: Cochin, Georgia, serif;\n}\n\n/*\nhtml, body, div, span, applet, object, iframe,\nh1, h2, h3, h4, h5, h6, p, blockquote, pre,\na, abbr, acronym, address, big, cite, code,\ndel, dfn, em, img, ins, kbd, q, s, samp,\nsmall, strike, strong, sub, sup, tt, var,\nb, u, i, center,\ndl, dt, dd, ol, ul, li,\nfieldset, form, label, legend,\ntable, caption, tbody, tfoot, thead, tr, th, td,\narticle, aside, canvas, details, embed,\nfigure, figcaption, footer, header, hgroup,\nmenu, nav, output, ruby, section, summary,\ntime, mark, audio, video {\n\tmargin: 0;\n\tpadding: 0;\n\tborder: 0;\n\tfont-size: 100%;\n\tfont: inherit;\n\tvertical-align: baseline;\n}\narticle, aside, details, figcaption, figure,\nfooter, header, hgroup, menu, nav, section {\n\tdisplay: block;\n}\nbody {\n\tline-height: 1;\n}\nol, ul {\n\tlist-style: none;\n}\nblockquote, q {\n\tquotes: none;\n}\nblockquote:before, blockquote:after,\nq:before, q:after {\n\tcontent: '';\n\tcontent: none;\n}\ntable {\n\tborder-collapse: collapse;\n\tborder-spacing: 0;\n}*/\n";

var layout = "/*\n  Column: 60px\n  Gutter: 24px\n\n  Body: 648px\n    - 8 columns\n    - 7 gutters\n  Middle: 816px\n  Page: 984px\n    - 12 columns\n    - 11 gutters\n*/\n\n.l-body,\n.l-body-outset,\n.l-page,\n.l-page-outset,\n.l-middle,\n.l-middle-outset,\ndt-article > div,\ndt-article > p,\ndt-article > h1,\ndt-article > h2,\ndt-article > h3,\ndt-article > h4,\ndt-article > figure,\ndt-article > ul,\ndt-article > dt-byline,\ndt-article > dt-code,\ndt-article section > div,\ndt-article section > p,\ndt-article section > h1,\ndt-article section > h2,\ndt-article section > h3,\ndt-article section > h4,\ndt-article section > figure,\ndt-article section > ul,\ndt-article section > dt-byline,\ndt-article section > dt-code {\n  width: auto;\n  margin-left: 24px;\n  margin-right: 24px;\n  box-sizing: border-box;\n}\n\n@media(min-width: 768px) {\n  .l-body,\n  .l-body-outset,\n  .l-page,\n  .l-page-outset,\n  .l-middle,\n  .l-middle-outset,\n  dt-article > div,\n  dt-article > p,\n  dt-article > h1,\n  dt-article > h2,\n  dt-article > h3,\n  dt-article > h4,\n  dt-article > figure,\n  dt-article > ul,\n  dt-article > dt-byline,\n  dt-article > dt-code,\n  dt-article section > div,\n  dt-article section > p,\n  dt-article section > h1,\n  dt-article section > h2,\n  dt-article section > h3,\n  dt-article section > h4,\n  dt-article section > figure,\n  dt-article section > ul,\n  dt-article section > dt-byline,\n  dt-article section > dt-code {\n    margin-left: 72px;\n    margin-right: 72px;\n  }\n}\n\n@media(min-width: 1080px) {\n  .l-body,\n  dt-article > div,\n  dt-article > p,\n  dt-article > h2,\n  dt-article > h3,\n  dt-article > h4,\n  dt-article > figure,\n  dt-article > ul,\n  dt-article > dt-byline,\n  dt-article > dt-code,\n  dt-article section > div,\n  dt-article section > p,\n  dt-article section > h2,\n  dt-article section > h3,\n  dt-article section > h4,\n  dt-article section > figure,\n  dt-article section > ul,\n  dt-article section > dt-byline,\n  dt-article section > dt-code {\n    margin-left: calc(50% - 984px / 2);\n    width: 648px;\n  }\n  .l-body-outset,\n  dt-article .l-body-outset {\n    margin-left: calc(50% - 984px / 2 - 96px/2);\n    width: calc(648px + 96px);\n  }\n  .l-middle,\n  dt-article .l-middle {\n    width: 816px;\n    margin-left: calc(50% - 984px / 2);\n    margin-right: auto;\n  }\n  .l-middle-outset,\n  dt-article .l-middle-outset {\n    width: calc(816px + 96px);\n    margin-left: calc(50% - 984px / 2 - 48px);\n    margin-right: auto;\n  }\n  dt-article > h1,\n  dt-article section > h1,\n  .l-page,\n  dt-article .l-page,\n  dt-article.centered .l-page {\n    width: 984px;\n    margin-left: auto;\n    margin-right: auto;\n  }\n  .l-page-outset,\n  dt-article .l-page-outset,\n  dt-article.centered .l-page-outset {\n    width: 1080px;\n    margin-left: auto;\n    margin-right: auto;\n  }\n  .l-screen,\n  dt-article .l-screen,\n  dt-article.centered .l-screen {\n    margin-left: auto;\n    margin-right: auto;\n    width: auto;\n  }\n  .l-screen-inset,\n  dt-article .l-screen-inset,\n  dt-article.centered .l-screen-inset {\n    margin-left: 24px;\n    margin-right: 24px;\n    width: auto;\n  }\n  .l-gutter,\n  dt-article .l-gutter {\n    clear: both;\n    float: right;\n    margin-top: 0;\n    margin-left: 24px;\n    margin-right: calc((100vw - 984px) / 2 + 168px);\n    width: calc((984px - 648px) / 2 - 24px);\n  }\n\n  /* Side */\n  .side.l-body,\n  dt-article .side.l-body {\n    clear: both;\n    float: right;\n    margin-top: 0;\n    margin-left: 48px;\n    margin-right: calc((100vw - 984px + 648px) / 2);\n    width: calc(648px / 2 - 24px - 84px);\n  }\n  .side.l-body-outset,\n  dt-article .side.l-body-outset {\n    clear: both;\n    float: right;\n    margin-top: 0;\n    margin-left: 48px;\n    margin-right: calc((100vw - 984px + 648px - 48px) / 2);\n    width: calc(648px / 2 - 48px + 24px);\n  }\n  .side.l-middle,\n  dt-article .side.l-middle {\n    clear: both;\n    float: right;\n    width: calc(456px - 84px);\n    margin-left: 48px;\n    margin-right: calc((100vw - 984px) / 2 + 168px);\n  }\n  .side.l-middle-outset,\n  dt-article .side.l-middle-outset {\n    clear: both;\n    float: right;\n    width: 456px;\n    margin-left: 48px;\n    margin-right: calc((100vw - 984px) / 2 + 168px);\n  }\n  .side.l-page,\n  dt-article .side.l-page {\n    clear: both;\n    float: right;\n    margin-left: 48px;\n    width: calc(624px - 84px);\n    margin-right: calc((100vw - 984px) / 2);\n  }\n  .side.l-page-outset,\n  dt-article .side.l-page-outset {\n    clear: both;\n    float: right;\n    width: 624px;\n    margin-right: calc((100vw - 984px) / 2);\n  }\n}\n\n/* Centered */\n\n@media(min-width: 1080px) {\n  .centered .l-body,\n  .centered.l-body,\n  dt-article.centered > div,\n  dt-article.centered > p,\n  dt-article.centered > h2,\n  dt-article.centered > h3,\n  dt-article.centered > h4,\n  dt-article.centered > figure,\n  dt-article.centered > ul,\n  dt-article.centered > dt-byline,\n  dt-article.centered > dt-code,\n  dt-article.centered section > div,\n  dt-article.centered section > p,\n  dt-article.centered section > h2,\n  dt-article.centered section > h3,\n  dt-article.centered section > h4,\n  dt-article.centered section > figure,\n  dt-article.centered section > ul,\n  dt-article.centered section > dt-byline,\n  dt-article.centered section > dt-code,\n  dt-article section.centered > div,\n  dt-article section.centered > p,\n  dt-article section.centered > h2,\n  dt-article section.centered > h3,\n  dt-article section.centered > h4,\n  dt-article section.centered > figure,\n  dt-article section.centered > ul,\n  dt-article section.centered > dt-byline,\n  dt-article section.centered > dt-code {\n    margin-left: auto;\n    margin-right: auto;\n    width: 648px;\n  }\n  .centered .l-body-outset,\n  .centered.l-body-outset,\n  dt-article.centered .l-body-outset {\n    margin-left: auto;\n    margin-right: auto;\n    width: calc(648px + 96px);\n  }\n  dt-article.centered > h1,\n  dt-article.centered section > h1,\n  dt-article section.centered > h1,\n  .centered .l-middle,\n  .centered.l-middle,\n  dt-article.centered .l-middle {\n    width: 816px;\n    margin-left: auto;\n    margin-right: auto;\n  }\n\n  .centered .l-middle-outset,\n  .centered.l-middle-outset,\n  dt-article.centered .l-middle-outset {\n    width: calc(816px + 96px);\n    margin-left: auto;\n    margin-right: auto;\n  }\n\n  /* page and screen are already centered */\n\n  /* Side */\n\n  .centered .side.l-body,\n  .centered dt-article .side.l-body {\n    clear: both;\n    float: right;\n    margin-top: 0;\n    margin-left: 48px;\n    margin-right: calc((100vw - 648px) / 2);\n    width: calc(4 * 60px + 3 * 24px);\n  }\n  .centered .side.l-body-outset,\n  .centered dt-article .side.l-body-outset {\n    clear: both;\n    float: right;\n    margin-top: 0;\n    margin-left: 48px;\n    margin-right: calc((100vw - 648px) / 2);\n    width: calc(4 * 60px + 3 * 24px);\n  }\n  .centered .side.l-middle,\n  .centered dt-article .side.l-middle {\n    clear: both;\n    float: right;\n    width: 396px;\n    margin-left: 48px;\n    margin-right: calc((100vw - 984px) / 2 + 168px / 2);\n  }\n  .centered .side.l-middle-outset,\n  .centered dt-article .side.l-middle-outset {\n    clear: both;\n    float: right;\n    width: 456px;\n    margin-left: 48px;\n    margin-right: calc((100vw - 984px) / 2 + 168px);\n  }\n  .centered .side.l-page,\n  .centered dt-article .side.l-page {\n    clear: both;\n    float: right;\n    width: 480px;\n    margin-right: calc((100vw - 984px) / 2);\n  }\n  .centered .side.l-page-outset,\n  .centered dt-article .side.l-page-outset {\n    clear: both;\n    float: right;\n    width: 480px;\n    margin-right: calc((100vw - 984px) / 2);\n  }\n  .centered .l-gutter,\n  .centered.l-gutter,\n  dt-article.centered .l-gutter {\n    clear: both;\n    float: right;\n    margin-top: 0;\n    margin-left: 24px;\n    margin-right: calc((100vw - 984px) / 2);\n    width: calc((984px - 648px) / 2 - 24px);\n  }\n\n}\n\n/* Rows and Columns */\n\n.row {\n  display: flex;\n}\n.column {\n  flex: 1;\n  box-sizing: border-box;\n  margin-right: 24px;\n  margin-left: 24px;\n}\n.row > .column:first-of-type {\n  margin-left: 0;\n}\n.row > .column:last-of-type {\n  margin-right: 0;\n}\n";

var article = "dt-article {\n  display: block;\n  color: rgba(0, 0, 0, 0.8);\n  font: 17px/1.55em -apple-system, BlinkMacSystemFont, \"Roboto\", sans-serif;\n  padding-bottom: 72px;\n  overflow: hidden;\n  background: white;\n  min-height: calc(100vh - 70px - 182px);\n}\n\n@media(min-width: 1024px) {\n  dt-article {\n    font-size: 20px;\n  }\n}\n\n/* H1 */\n\ndt-article h1 {\n  margin-top: 18px;\n  font-weight: 400;\n  font-size: 40px;\n  line-height: 1em;\n  font-family: HoeflerText-Regular, Cochin, Georgia, serif;\n}\n@media(min-width: 768px) {\n  dt-article h1 {\n    font-size: 46px;\n    margin-top: 48px;\n    margin-bottom: 12px;\n  }\n}\n\n@media(min-width: 1080px) {\n  .centered h1 {\n    text-align: center;\n  }\n\n  dt-article h1 {\n    font-size: 50px;\n    letter-spacing: -0.02em;\n  }\n\n  dt-article > h1:first-of-type,\n  dt-article section > h1:first-of-type {\n    margin-top: 80px;\n  }\n}\n\n\n@media(min-width: 1200px) {\n  dt-article h1 {\n    font-size: 56px;\n  }\n\n  dt-article > h1:first-of-type {\n    margin-top: 100px;\n  }\n}\n\n/* H2 */\n\ndt-article h2 {\n  font-family: HoeflerText-Regular, Cochin, Georgia, serif;\n  font-weight: 400;\n  font-size: 26px;\n  line-height: 1.25em;\n  margin-top: 36px;\n  margin-bottom: 24px;\n}\n\n@media(min-width: 1024px) {\n  dt-article h2 {\n    margin-top: 48px;\n    font-size: 30px;\n  }\n}\n\ndt-article h1 + h2 {\n  font-weight: 300;\n  font-size: 20px;\n  line-height: 1.4em;\n  margin-top: 8px;\n  font-style: normal;\n}\n\n\n@media(min-width: 1080px) {\n  .centered h1 + h2 {\n    text-align: center;\n  }\n  dt-article h1 + h2 {\n    margin-top: 12px;\n    font-size: 24px;\n  }\n}\n\n/* H3 */\n\ndt-article h3 {\n  font-family: HoeflerText-Regular, Georgia, serif;\n  font-weight: 400;\n  font-size: 20px;\n  line-height: 1.4em;\n  margin-top: 36px;\n  margin-bottom: 18px;\n  font-style: italic;\n}\n\ndt-article h1 + h3 {\n  margin-top: 48px;\n}\n\n@media(min-width: 1024px) {\n  dt-article h3 {\n    font-size: 26px;\n  }\n}\n\n/* H4 */\n\ndt-article h4 {\n  font-weight: 600;\n  text-transform: uppercase;\n  font-size: 14px;\n  line-height: 1.4em;\n}\n\ndt-article a {\n  color: inherit;\n}\n\ndt-article p,\ndt-article ul,\ndt-article ol {\n  margin-bottom: 24px;\n  font-family: Georgia, serif;\n}\n\ndt-article p b,\ndt-article ul b,\ndt-article ol b {\n  -webkit-font-smoothing: antialiased;\n}\n\ndt-article a {\n  border-bottom: 1px solid rgba(0, 0, 0, 0.4);\n  text-decoration: none;\n}\n\ndt-article a:hover {\n  border-bottom: 1px solid rgba(0, 0, 0, 0.8);\n}\n\ndt-article .link {\n  text-decoration: underline;\n  cursor: pointer;\n}\n\ndt-article ul,\ndt-article ol {\n  padding-left: 24px;\n}\n\ndt-article li {\n  margin-bottom: 24px;\n  margin-left: 0;\n  padding-left: 0;\n}\n\ndt-article pre {\n  font-size: 14px;\n  margin-bottom: 20px;\n}\n\n\ndt-article hr {\n  border: none;\n  border-bottom: 1px solid rgba(0, 0, 0, 0.2);\n  margin-top: 60px;\n  margin-bottom: 60px;\n}\n\ndt-article section {\n  margin-top: 60px;\n  margin-bottom: 60px;\n}\n\n\n/* Figure */\n\ndt-article figure {\n  position: relative;\n  margin-top: 30px;\n  margin-bottom: 30px;\n}\n\n@media(min-width: 1024px) {\n  dt-article figure {\n    margin-top: 48px;\n    margin-bottom: 48px;\n  }\n}\n\ndt-article figure img {\n  width: 100%;\n}\n\ndt-article figure svg text,\ndt-article figure svg tspan {\n}\n\ndt-article figure figcaption {\n  color: rgba(0, 0, 0, 0.6);\n  font-size: 12px;\n  line-height: 1.5em;\n}\n@media(min-width: 1024px) {\n  dt-article figure figcaption {\n    font-size: 13px;\n  }\n}\n\ndt-article figure.external img {\n  background: white;\n  border: 1px solid rgba(0, 0, 0, 0.1);\n  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.1);\n  padding: 18px;\n  box-sizing: border-box;\n}\n\ndt-article figure figcaption a {\n  color: rgba(0, 0, 0, 0.6);\n}\n\n/*dt-article figure figcaption::before {\n  position: relative;\n  display: block;\n  top: -20px;\n  content: \"\";\n  width: 25px;\n  border-top: 1px solid rgba(0, 0, 0, 0.3);\n}*/\n\ndt-article span.equation-mimic {\n  font-family: georgia;\n  font-size: 115%;\n  font-style: italic;\n}\n\ndt-article figure figcaption b {\n  font-weight: 600;\n  color: rgba(0, 0, 0, 1.0);\n}\n\ndt-article > dt-code,\ndt-article section > dt-code  {\n  display: block;\n}\n\ndt-article .citation {\n  color: #668;\n  cursor: pointer;\n}\n\ndt-include {\n  width: auto;\n  display: block;\n}\n";

var code = "/**\n * prism.js default theme for JavaScript, CSS and HTML\n * Based on dabblet (http://dabblet.com)\n * @author Lea Verou\n */\n\ncode {\n  white-space: nowrap;\n  background: rgba(0, 0, 0, 0.04);\n  border-radius: 2px;\n  padding: 4px 7px;\n  font-size: 15px;\n  color: rgba(0, 0, 0, 0.6);\n}\n\npre code {\n  display: block;\n  background: white;\n  border-left: 3px solid rgba(0, 0, 0, 0.05);\n  padding: 0 0 0 24px;\n}\n\n\ncode[class*=\"language-\"],\npre[class*=\"language-\"] {\n  text-shadow: 0 1px white;\n  font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;\n  text-align: left;\n  white-space: pre;\n  word-spacing: normal;\n  word-break: normal;\n  word-wrap: normal;\n  line-height: 1.5;\n\n  -moz-tab-size: 4;\n  -o-tab-size: 4;\n  tab-size: 4;\n\n  -webkit-hyphens: none;\n  -moz-hyphens: none;\n  -ms-hyphens: none;\n  hyphens: none;\n}\n\npre[class*=\"language-\"]::-moz-selection, pre[class*=\"language-\"] ::-moz-selection,\ncode[class*=\"language-\"]::-moz-selection, code[class*=\"language-\"] ::-moz-selection {\n  text-shadow: none;\n  background: #b3d4fc;\n}\n\npre[class*=\"language-\"]::selection, pre[class*=\"language-\"] ::selection,\ncode[class*=\"language-\"]::selection, code[class*=\"language-\"] ::selection {\n  text-shadow: none;\n  background: #b3d4fc;\n}\n\n@media print {\n  code[class*=\"language-\"],\n  pre[class*=\"language-\"] {\n  text-shadow: none;\n  }\n}\n\n/* Code blocks */\npre[class*=\"language-\"] {\n  overflow: auto;\n}\n\n:not(pre) > code[class*=\"language-\"],\npre[class*=\"language-\"] {\n}\n\n/* Inline code */\n:not(pre) > code[class*=\"language-\"] {\n  white-space: normal;\n}\n\n.token.comment,\n.token.prolog,\n.token.doctype,\n.token.cdata {\n  color: slategray;\n}\n\n.token.punctuation {\n  color: #999;\n}\n\n.namespace {\n  opacity: .7;\n}\n\n.token.property,\n.token.tag,\n.token.boolean,\n.token.number,\n.token.constant,\n.token.symbol,\n.token.deleted {\n  color: #905;\n}\n\n.token.selector,\n.token.attr-name,\n.token.string,\n.token.char,\n.token.builtin,\n.token.inserted {\n  color: #690;\n}\n\n.token.operator,\n.token.entity,\n.token.url,\n.language-css .token.string,\n.style .token.string {\n  color: #a67f59;\n  background: hsla(0, 0%, 100%, .5);\n}\n\n.token.atrule,\n.token.attr-value,\n.token.keyword {\n  color: #07a;\n}\n\n.token.function {\n  color: #DD4A68;\n}\n\n.token.regex,\n.token.important,\n.token.variable {\n  color: #e90;\n}\n\n.token.important,\n.token.bold {\n  font-weight: bold;\n}\n.token.italic {\n  font-style: italic;\n}\n\n.token.entity {\n  cursor: help;\n}\n";

var print = "\n@media print {\n  @page {\n    size: 8in 11in;\n  }\n  html {\n  }\n  p, code {\n    page-break-inside: avoid;\n  }\n  h2, h3 {\n    page-break-after: avoid;\n  }\n  dt-header {\n    visibility: hidden;\n  }\n  dt-footer {\n    display: none!important;\n  }\n}\n";

var styles = function(dom) {
  var s = dom.createElement("style");
  s.textContent = base + layout + article + code + print;
  dom.querySelector("head").appendChild(s);
};

function isNothing(subject) {
  return (typeof subject === 'undefined') || (subject === null);
}


function isObject(subject) {
  return (typeof subject === 'object') && (subject !== null);
}


function toArray(sequence) {
  if (Array.isArray(sequence)) { return sequence; }
  else if (isNothing(sequence)) { return []; }

  return [ sequence ];
}


function extend(target, source) {
  var index, length, key, sourceKeys;

  if (source) {
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    for (index = 0, length = sourceKeys.length; index < length; index += 1) {
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  return target;
}


function repeat(string, count) {
  var result = '', cycle;

  for (cycle = 0; cycle < count; cycle += 1) {
    result += string;
  }

  return result;
}


function isNegativeZero(number) {
  return (number === 0) && (Number.NEGATIVE_INFINITY === 1 / number);
}


var isNothing_1 = isNothing;
var isObject_1 = isObject;
var toArray_1 = toArray;
var repeat_1 = repeat;
var isNegativeZero_1 = isNegativeZero;
var extend_1 = extend;

var common$1 = {
	isNothing: isNothing_1,
	isObject: isObject_1,
	toArray: toArray_1,
	repeat: repeat_1,
	isNegativeZero: isNegativeZero_1,
	extend: extend_1
};

// YAML error class. http://stackoverflow.com/questions/8458984
//
function YAMLException$2(reason, mark) {
  // Super constructor
  Error.call(this);

  // Include stack trace in error object
  if (Error.captureStackTrace) {
    // Chrome and NodeJS
    Error.captureStackTrace(this, this.constructor);
  } else {
    // FF, IE 10+ and Safari 6+. Fallback for others
    this.stack = (new Error()).stack || '';
  }

  this.name = 'YAMLException';
  this.reason = reason;
  this.mark = mark;
  this.message = (this.reason || '(unknown reason)') + (this.mark ? ' ' + this.mark.toString() : '');
}


// Inherit from Error
YAMLException$2.prototype = Object.create(Error.prototype);
YAMLException$2.prototype.constructor = YAMLException$2;


YAMLException$2.prototype.toString = function toString(compact) {
  var result = this.name + ': ';

  result += this.reason || '(unknown reason)';

  if (!compact && this.mark) {
    result += ' ' + this.mark.toString();
  }

  return result;
};


var exception = YAMLException$2;

var common$3 = common$1;


function Mark$1(name, buffer, position, line, column) {
  this.name     = name;
  this.buffer   = buffer;
  this.position = position;
  this.line     = line;
  this.column   = column;
}


Mark$1.prototype.getSnippet = function getSnippet(indent, maxLength) {
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  tail = '';
  end = this.position;

  while (end < this.buffer.length && '\x00\r\n\x85\u2028\u2029'.indexOf(this.buffer.charAt(end)) === -1) {
    end += 1;
    if (end - this$1.position > (maxLength / 2 - 1)) {
      tail = ' ... ';
      end -= 5;
      break;
    }
  }

  snippet = this.buffer.slice(start, end);

  return common$3.repeat(' ', indent) + head + snippet + tail + '\n' +
         common$3.repeat(' ', indent + this.position - start + head.length) + '^';
};


Mark$1.prototype.toString = function toString(compact) {
  var snippet, where = '';

  if (this.name) {
    where += 'in "' + this.name + '" ';
  }

  where += 'at line ' + (this.line + 1) + ', column ' + (this.column + 1);

  if (!compact) {
    snippet = this.getSnippet();

    if (snippet) {
      where += ':\n' + snippet;
    }
  }

  return where;
};


var mark = Mark$1;

var YAMLException$4 = exception;

var TYPE_CONSTRUCTOR_OPTIONS = [
  'kind',
  'resolve',
  'construct',
  'instanceOf',
  'predicate',
  'represent',
  'defaultStyle',
  'styleAliases'
];

var YAML_NODE_KINDS = [
  'scalar',
  'sequence',
  'mapping'
];

function compileStyleAliases(map) {
  var result = {};

  if (map !== null) {
    Object.keys(map).forEach(function (style) {
      map[style].forEach(function (alias) {
        result[String(alias)] = style;
      });
    });
  }

  return result;
}

function Type$2(tag, options) {
  options = options || {};

  Object.keys(options).forEach(function (name) {
    if (TYPE_CONSTRUCTOR_OPTIONS.indexOf(name) === -1) {
      throw new YAMLException$4('Unknown option "' + name + '" is met in definition of "' + tag + '" YAML type.');
    }
  });

  // TODO: Add tag format check.
  this.tag          = tag;
  this.kind         = options['kind']         || null;
  this.resolve      = options['resolve']      || function () { return true; };
  this.construct    = options['construct']    || function (data) { return data; };
  this.instanceOf   = options['instanceOf']   || null;
  this.predicate    = options['predicate']    || null;
  this.represent    = options['represent']    || null;
  this.defaultStyle = options['defaultStyle'] || null;
  this.styleAliases = compileStyleAliases(options['styleAliases'] || null);

  if (YAML_NODE_KINDS.indexOf(this.kind) === -1) {
    throw new YAMLException$4('Unknown kind "' + this.kind + '" is specified for "' + tag + '" YAML type.');
  }
}

var type = Type$2;

/*eslint-disable max-len*/

var common$4        = common$1;
var YAMLException$3 = exception;
var Type$1          = type;


function compileList(schema, name, result) {
  var exclude = [];

  schema.include.forEach(function (includedSchema) {
    result = compileList(includedSchema, name, result);
  });

  schema[name].forEach(function (currentType) {
    result.forEach(function (previousType, previousIndex) {
      if (previousType.tag === currentType.tag && previousType.kind === currentType.kind) {
        exclude.push(previousIndex);
      }
    });

    result.push(currentType);
  });

  return result.filter(function (type$$1, index) {
    return exclude.indexOf(index) === -1;
  });
}


function compileMap(/* lists... */) {
  var arguments$1 = arguments;

  var result = {
        scalar: {},
        sequence: {},
        mapping: {},
        fallback: {}
      }, index, length;

  function collectType(type$$1) {
    result[type$$1.kind][type$$1.tag] = result['fallback'][type$$1.tag] = type$$1;
  }

  for (index = 0, length = arguments.length; index < length; index += 1) {
    arguments$1[index].forEach(collectType);
  }
  return result;
}


function Schema$2(definition) {
  this.include  = definition.include  || [];
  this.implicit = definition.implicit || [];
  this.explicit = definition.explicit || [];

  this.implicit.forEach(function (type$$1) {
    if (type$$1.loadKind && type$$1.loadKind !== 'scalar') {
      throw new YAMLException$3('There is a non-scalar type in the implicit list of a schema. Implicit resolving of such types is not supported.');
    }
  });

  this.compiledImplicit = compileList(this, 'implicit', []);
  this.compiledExplicit = compileList(this, 'explicit', []);
  this.compiledTypeMap  = compileMap(this.compiledImplicit, this.compiledExplicit);
}


Schema$2.DEFAULT = null;


Schema$2.create = function createSchema() {
  var schemas, types;

  switch (arguments.length) {
    case 1:
      schemas = Schema$2.DEFAULT;
      types = arguments[0];
      break;

    case 2:
      schemas = arguments[0];
      types = arguments[1];
      break;

    default:
      throw new YAMLException$3('Wrong number of arguments for Schema.create function');
  }

  schemas = common$4.toArray(schemas);
  types = common$4.toArray(types);

  if (!schemas.every(function (schema) { return schema instanceof Schema$2; })) {
    throw new YAMLException$3('Specified list of super schemas (or a single Schema object) contains a non-Schema object.');
  }

  if (!types.every(function (type$$1) { return type$$1 instanceof Type$1; })) {
    throw new YAMLException$3('Specified list of YAML types (or a single Type object) contains a non-Type object.');
  }

  return new Schema$2({
    include: schemas,
    explicit: types
  });
};


var schema = Schema$2;

var Type$3 = type;

var str = new Type$3('tag:yaml.org,2002:str', {
  kind: 'scalar',
  construct: function (data) { return data !== null ? data : ''; }
});

var Type$4 = type;

var seq = new Type$4('tag:yaml.org,2002:seq', {
  kind: 'sequence',
  construct: function (data) { return data !== null ? data : []; }
});

var Type$5 = type;

var map = new Type$5('tag:yaml.org,2002:map', {
  kind: 'mapping',
  construct: function (data) { return data !== null ? data : {}; }
});

var Schema$5 = schema;


var failsafe = new Schema$5({
  explicit: [
    str,
    seq,
    map
  ]
});

var Type$6 = type;

function resolveYamlNull(data) {
  if (data === null) { return true; }

  var max = data.length;

  return (max === 1 && data === '~') ||
         (max === 4 && (data === 'null' || data === 'Null' || data === 'NULL'));
}

function constructYamlNull() {
  return null;
}

function isNull(object) {
  return object === null;
}

var _null = new Type$6('tag:yaml.org,2002:null', {
  kind: 'scalar',
  resolve: resolveYamlNull,
  construct: constructYamlNull,
  predicate: isNull,
  represent: {
    canonical: function () { return '~';    },
    lowercase: function () { return 'null'; },
    uppercase: function () { return 'NULL'; },
    camelcase: function () { return 'Null'; }
  },
  defaultStyle: 'lowercase'
});

var Type$7 = type;

function resolveYamlBoolean(data) {
  if (data === null) { return false; }

  var max = data.length;

  return (max === 4 && (data === 'true' || data === 'True' || data === 'TRUE')) ||
         (max === 5 && (data === 'false' || data === 'False' || data === 'FALSE'));
}

function constructYamlBoolean(data) {
  return data === 'true' ||
         data === 'True' ||
         data === 'TRUE';
}

function isBoolean(object) {
  return Object.prototype.toString.call(object) === '[object Boolean]';
}

var bool = new Type$7('tag:yaml.org,2002:bool', {
  kind: 'scalar',
  resolve: resolveYamlBoolean,
  construct: constructYamlBoolean,
  predicate: isBoolean,
  represent: {
    lowercase: function (object) { return object ? 'true' : 'false'; },
    uppercase: function (object) { return object ? 'TRUE' : 'FALSE'; },
    camelcase: function (object) { return object ? 'True' : 'False'; }
  },
  defaultStyle: 'lowercase'
});

var common$5 = common$1;
var Type$8   = type;

function isHexCode(c) {
  return ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) ||
         ((0x41/* A */ <= c) && (c <= 0x46/* F */)) ||
         ((0x61/* a */ <= c) && (c <= 0x66/* f */));
}

function isOctCode(c) {
  return ((0x30/* 0 */ <= c) && (c <= 0x37/* 7 */));
}

function isDecCode(c) {
  return ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */));
}

function resolveYamlInteger(data) {
  if (data === null) { return false; }

  var max = data.length,
      index = 0,
      hasDigits = false,
      ch;

  if (!max) { return false; }

  ch = data[index];

  // sign
  if (ch === '-' || ch === '+') {
    ch = data[++index];
  }

  if (ch === '0') {
    // 0
    if (index + 1 === max) { return true; }
    ch = data[++index];

    // base 2, base 8, base 16

    if (ch === 'b') {
      // base 2
      index++;

      for (; index < max; index++) {
        ch = data[index];
        if (ch === '_') { continue; }
        if (ch !== '0' && ch !== '1') { return false; }
        hasDigits = true;
      }
      return hasDigits;
    }


    if (ch === 'x') {
      // base 16
      index++;

      for (; index < max; index++) {
        ch = data[index];
        if (ch === '_') { continue; }
        if (!isHexCode(data.charCodeAt(index))) { return false; }
        hasDigits = true;
      }
      return hasDigits;
    }

    // base 8
    for (; index < max; index++) {
      ch = data[index];
      if (ch === '_') { continue; }
      if (!isOctCode(data.charCodeAt(index))) { return false; }
      hasDigits = true;
    }
    return hasDigits;
  }

  // base 10 (except 0) or base 60

  for (; index < max; index++) {
    ch = data[index];
    if (ch === '_') { continue; }
    if (ch === ':') { break; }
    if (!isDecCode(data.charCodeAt(index))) {
      return false;
    }
    hasDigits = true;
  }

  if (!hasDigits) { return false; }

  // if !base60 - done;
  if (ch !== ':') { return true; }

  // base60 almost not used, no needs to optimize
  return /^(:[0-5]?[0-9])+$/.test(data.slice(index));
}

function constructYamlInteger(data) {
  var value = data, sign = 1, ch, base, digits = [];

  if (value.indexOf('_') !== -1) {
    value = value.replace(/_/g, '');
  }

  ch = value[0];

  if (ch === '-' || ch === '+') {
    if (ch === '-') { sign = -1; }
    value = value.slice(1);
    ch = value[0];
  }

  if (value === '0') { return 0; }

  if (ch === '0') {
    if (value[1] === 'b') { return sign * parseInt(value.slice(2), 2); }
    if (value[1] === 'x') { return sign * parseInt(value, 16); }
    return sign * parseInt(value, 8);
  }

  if (value.indexOf(':') !== -1) {
    value.split(':').forEach(function (v) {
      digits.unshift(parseInt(v, 10));
    });

    value = 0;
    base = 1;

    digits.forEach(function (d) {
      value += (d * base);
      base *= 60;
    });

    return sign * value;

  }

  return sign * parseInt(value, 10);
}

function isInteger(object) {
  return (Object.prototype.toString.call(object)) === '[object Number]' &&
         (object % 1 === 0 && !common$5.isNegativeZero(object));
}

var int_1 = new Type$8('tag:yaml.org,2002:int', {
  kind: 'scalar',
  resolve: resolveYamlInteger,
  construct: constructYamlInteger,
  predicate: isInteger,
  represent: {
    binary:      function (object) { return '0b' + object.toString(2); },
    octal:       function (object) { return '0'  + object.toString(8); },
    decimal:     function (object) { return        object.toString(10); },
    hexadecimal: function (object) { return '0x' + object.toString(16).toUpperCase(); }
  },
  defaultStyle: 'decimal',
  styleAliases: {
    binary:      [ 2,  'bin' ],
    octal:       [ 8,  'oct' ],
    decimal:     [ 10, 'dec' ],
    hexadecimal: [ 16, 'hex' ]
  }
});

var common$6 = common$1;
var Type$9   = type;

var YAML_FLOAT_PATTERN = new RegExp(
  '^(?:[-+]?(?:[0-9][0-9_]*)\\.[0-9_]*(?:[eE][-+][0-9]+)?' +
  '|\\.[0-9_]+(?:[eE][-+][0-9]+)?' +
  '|[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\\.[0-9_]*' +
  '|[-+]?\\.(?:inf|Inf|INF)' +
  '|\\.(?:nan|NaN|NAN))$');

function resolveYamlFloat(data) {
  if (data === null) { return false; }

  if (!YAML_FLOAT_PATTERN.test(data)) { return false; }

  return true;
}

function constructYamlFloat(data) {
  var value, sign, base, digits;

  value  = data.replace(/_/g, '').toLowerCase();
  sign   = value[0] === '-' ? -1 : 1;
  digits = [];

  if ('+-'.indexOf(value[0]) >= 0) {
    value = value.slice(1);
  }

  if (value === '.inf') {
    return (sign === 1) ? Number.POSITIVE_INFINITY : Number.NEGATIVE_INFINITY;

  } else if (value === '.nan') {
    return NaN;

  } else if (value.indexOf(':') >= 0) {
    value.split(':').forEach(function (v) {
      digits.unshift(parseFloat(v, 10));
    });

    value = 0.0;
    base = 1;

    digits.forEach(function (d) {
      value += d * base;
      base *= 60;
    });

    return sign * value;

  }
  return sign * parseFloat(value, 10);
}


var SCIENTIFIC_WITHOUT_DOT = /^[-+]?[0-9]+e/;

function representYamlFloat(object, style) {
  var res;

  if (isNaN(object)) {
    switch (style) {
      case 'lowercase': return '.nan';
      case 'uppercase': return '.NAN';
      case 'camelcase': return '.NaN';
    }
  } else if (Number.POSITIVE_INFINITY === object) {
    switch (style) {
      case 'lowercase': return '.inf';
      case 'uppercase': return '.INF';
      case 'camelcase': return '.Inf';
    }
  } else if (Number.NEGATIVE_INFINITY === object) {
    switch (style) {
      case 'lowercase': return '-.inf';
      case 'uppercase': return '-.INF';
      case 'camelcase': return '-.Inf';
    }
  } else if (common$6.isNegativeZero(object)) {
    return '-0.0';
  }

  res = object.toString(10);

  // JS stringifier can build scientific format without dots: 5e-100,
  // while YAML requres dot: 5.e-100. Fix it with simple hack

  return SCIENTIFIC_WITHOUT_DOT.test(res) ? res.replace('e', '.e') : res;
}

function isFloat(object) {
  return (Object.prototype.toString.call(object) === '[object Number]') &&
         (object % 1 !== 0 || common$6.isNegativeZero(object));
}

var float_1 = new Type$9('tag:yaml.org,2002:float', {
  kind: 'scalar',
  resolve: resolveYamlFloat,
  construct: constructYamlFloat,
  predicate: isFloat,
  represent: representYamlFloat,
  defaultStyle: 'lowercase'
});

var Schema$4 = schema;


var json = new Schema$4({
  include: [
    failsafe
  ],
  implicit: [
    _null,
    bool,
    int_1,
    float_1
  ]
});

var Schema$3 = schema;


var core = new Schema$3({
  include: [
    json
  ]
});

var Type$10 = type;

var YAML_DATE_REGEXP = new RegExp(
  '^([0-9][0-9][0-9][0-9])'          + // [1] year
  '-([0-9][0-9])'                    + // [2] month
  '-([0-9][0-9])$');                   // [3] day

var YAML_TIMESTAMP_REGEXP = new RegExp(
  '^([0-9][0-9][0-9][0-9])'          + // [1] year
  '-([0-9][0-9]?)'                   + // [2] month
  '-([0-9][0-9]?)'                   + // [3] day
  '(?:[Tt]|[ \\t]+)'                 + // ...
  '([0-9][0-9]?)'                    + // [4] hour
  ':([0-9][0-9])'                    + // [5] minute
  ':([0-9][0-9])'                    + // [6] second
  '(?:\\.([0-9]*))?'                 + // [7] fraction
  '(?:[ \\t]*(Z|([-+])([0-9][0-9]?)' + // [8] tz [9] tz_sign [10] tz_hour
  '(?::([0-9][0-9]))?))?$');           // [11] tz_minute

function resolveYamlTimestamp(data) {
  if (data === null) { return false; }
  if (YAML_DATE_REGEXP.exec(data) !== null) { return true; }
  if (YAML_TIMESTAMP_REGEXP.exec(data) !== null) { return true; }
  return false;
}

function constructYamlTimestamp(data) {
  var match, year, month, day, hour, minute, second, fraction = 0,
      delta = null, tz_hour, tz_minute, date;

  match = YAML_DATE_REGEXP.exec(data);
  if (match === null) { match = YAML_TIMESTAMP_REGEXP.exec(data); }

  if (match === null) { throw new Error('Date resolve error'); }

  // match: [1] year [2] month [3] day

  year = +(match[1]);
  month = +(match[2]) - 1; // JS month starts with 0
  day = +(match[3]);

  if (!match[4]) { // no hour
    return new Date(Date.UTC(year, month, day));
  }

  // match: [4] hour [5] minute [6] second [7] fraction

  hour = +(match[4]);
  minute = +(match[5]);
  second = +(match[6]);

  if (match[7]) {
    fraction = match[7].slice(0, 3);
    while (fraction.length < 3) { // milli-seconds
      fraction += '0';
    }
    fraction = +fraction;
  }

  // match: [8] tz [9] tz_sign [10] tz_hour [11] tz_minute

  if (match[9]) {
    tz_hour = +(match[10]);
    tz_minute = +(match[11] || 0);
    delta = (tz_hour * 60 + tz_minute) * 60000; // delta in mili-seconds
    if (match[9] === '-') { delta = -delta; }
  }

  date = new Date(Date.UTC(year, month, day, hour, minute, second, fraction));

  if (delta) { date.setTime(date.getTime() - delta); }

  return date;
}

function representYamlTimestamp(object /*, style*/) {
  return object.toISOString();
}

var timestamp = new Type$10('tag:yaml.org,2002:timestamp', {
  kind: 'scalar',
  resolve: resolveYamlTimestamp,
  construct: constructYamlTimestamp,
  instanceOf: Date,
  represent: representYamlTimestamp
});

var Type$11 = type;

function resolveYamlMerge(data) {
  return data === '<<' || data === null;
}

var merge = new Type$11('tag:yaml.org,2002:merge', {
  kind: 'scalar',
  resolve: resolveYamlMerge
});

var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};

function commonjsRequire () {
	throw new Error('Dynamic requires are not currently supported by rollup-plugin-commonjs');
}



function createCommonjsModule(fn, module) {
	return module = { exports: {} }, fn(module, module.exports), module.exports;
}

/*eslint-disable no-bitwise*/

var NodeBuffer;

try {
  // A trick for browserified version, to not include `Buffer` shim
  var _require = commonjsRequire;
  NodeBuffer = _require('buffer').Buffer;
} catch (__) {}

var Type$12       = type;


// [ 64, 65, 66 ] -> [ padding, CR, LF ]
var BASE64_MAP = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n\r';


function resolveYamlBinary(data) {
  if (data === null) { return false; }

  var code, idx, bitlen = 0, max = data.length, map = BASE64_MAP;

  // Convert one by one.
  for (idx = 0; idx < max; idx++) {
    code = map.indexOf(data.charAt(idx));

    // Skip CR/LF
    if (code > 64) { continue; }

    // Fail on illegal characters
    if (code < 0) { return false; }

    bitlen += 6;
  }

  // If there are any bits left, source was corrupted
  return (bitlen % 8) === 0;
}

function constructYamlBinary(data) {
  var idx, tailbits,
      input = data.replace(/[\r\n=]/g, ''), // remove CR/LF & padding to simplify scan
      max = input.length,
      map = BASE64_MAP,
      bits = 0,
      result = [];

  // Collect by 6*4 bits (3 bytes)

  for (idx = 0; idx < max; idx++) {
    if ((idx % 4 === 0) && idx) {
      result.push((bits >> 16) & 0xFF);
      result.push((bits >> 8) & 0xFF);
      result.push(bits & 0xFF);
    }

    bits = (bits << 6) | map.indexOf(input.charAt(idx));
  }

  // Dump tail

  tailbits = (max % 4) * 6;

  if (tailbits === 0) {
    result.push((bits >> 16) & 0xFF);
    result.push((bits >> 8) & 0xFF);
    result.push(bits & 0xFF);
  } else if (tailbits === 18) {
    result.push((bits >> 10) & 0xFF);
    result.push((bits >> 2) & 0xFF);
  } else if (tailbits === 12) {
    result.push((bits >> 4) & 0xFF);
  }

  // Wrap into Buffer for NodeJS and leave Array for browser
  if (NodeBuffer) { return new NodeBuffer(result); }

  return result;
}

function representYamlBinary(object /*, style*/) {
  var result = '', bits = 0, idx, tail,
      max = object.length,
      map = BASE64_MAP;

  // Convert every three bytes to 4 ASCII characters.

  for (idx = 0; idx < max; idx++) {
    if ((idx % 3 === 0) && idx) {
      result += map[(bits >> 18) & 0x3F];
      result += map[(bits >> 12) & 0x3F];
      result += map[(bits >> 6) & 0x3F];
      result += map[bits & 0x3F];
    }

    bits = (bits << 8) + object[idx];
  }

  // Dump tail

  tail = max % 3;

  if (tail === 0) {
    result += map[(bits >> 18) & 0x3F];
    result += map[(bits >> 12) & 0x3F];
    result += map[(bits >> 6) & 0x3F];
    result += map[bits & 0x3F];
  } else if (tail === 2) {
    result += map[(bits >> 10) & 0x3F];
    result += map[(bits >> 4) & 0x3F];
    result += map[(bits << 2) & 0x3F];
    result += map[64];
  } else if (tail === 1) {
    result += map[(bits >> 2) & 0x3F];
    result += map[(bits << 4) & 0x3F];
    result += map[64];
    result += map[64];
  }

  return result;
}

function isBinary(object) {
  return NodeBuffer && NodeBuffer.isBuffer(object);
}

var binary = new Type$12('tag:yaml.org,2002:binary', {
  kind: 'scalar',
  resolve: resolveYamlBinary,
  construct: constructYamlBinary,
  predicate: isBinary,
  represent: representYamlBinary
});

var Type$13 = type;

var _hasOwnProperty$1 = Object.prototype.hasOwnProperty;
var _toString       = Object.prototype.toString;

function resolveYamlOmap(data) {
  if (data === null) { return true; }

  var objectKeys = [], index, length, pair, pairKey, pairHasKey,
      object = data;

  for (index = 0, length = object.length; index < length; index += 1) {
    pair = object[index];
    pairHasKey = false;

    if (_toString.call(pair) !== '[object Object]') { return false; }

    for (pairKey in pair) {
      if (_hasOwnProperty$1.call(pair, pairKey)) {
        if (!pairHasKey) { pairHasKey = true; }
        else { return false; }
      }
    }

    if (!pairHasKey) { return false; }

    if (objectKeys.indexOf(pairKey) === -1) { objectKeys.push(pairKey); }
    else { return false; }
  }

  return true;
}

function constructYamlOmap(data) {
  return data !== null ? data : [];
}

var omap = new Type$13('tag:yaml.org,2002:omap', {
  kind: 'sequence',
  resolve: resolveYamlOmap,
  construct: constructYamlOmap
});

var Type$14 = type;

var _toString$1 = Object.prototype.toString;

function resolveYamlPairs(data) {
  if (data === null) { return true; }

  var index, length, pair, keys, result,
      object = data;

  result = new Array(object.length);

  for (index = 0, length = object.length; index < length; index += 1) {
    pair = object[index];

    if (_toString$1.call(pair) !== '[object Object]') { return false; }

    keys = Object.keys(pair);

    if (keys.length !== 1) { return false; }

    result[index] = [ keys[0], pair[keys[0]] ];
  }

  return true;
}

function constructYamlPairs(data) {
  if (data === null) { return []; }

  var index, length, pair, keys, result,
      object = data;

  result = new Array(object.length);

  for (index = 0, length = object.length; index < length; index += 1) {
    pair = object[index];

    keys = Object.keys(pair);

    result[index] = [ keys[0], pair[keys[0]] ];
  }

  return result;
}

var pairs = new Type$14('tag:yaml.org,2002:pairs', {
  kind: 'sequence',
  resolve: resolveYamlPairs,
  construct: constructYamlPairs
});

var Type$15 = type;

var _hasOwnProperty$2 = Object.prototype.hasOwnProperty;

function resolveYamlSet(data) {
  if (data === null) { return true; }

  var key, object = data;

  for (key in object) {
    if (_hasOwnProperty$2.call(object, key)) {
      if (object[key] !== null) { return false; }
    }
  }

  return true;
}

function constructYamlSet(data) {
  return data !== null ? data : {};
}

var set = new Type$15('tag:yaml.org,2002:set', {
  kind: 'mapping',
  resolve: resolveYamlSet,
  construct: constructYamlSet
});

var Schema$1 = schema;


var default_safe = new Schema$1({
  include: [
    core
  ],
  implicit: [
    timestamp,
    merge
  ],
  explicit: [
    binary,
    omap,
    pairs,
    set
  ]
});

var Type$16 = type;

function resolveJavascriptUndefined() {
  return true;
}

function constructJavascriptUndefined() {
  /*eslint-disable no-undefined*/
  return undefined;
}

function representJavascriptUndefined() {
  return '';
}

function isUndefined(object) {
  return typeof object === 'undefined';
}

var _undefined = new Type$16('tag:yaml.org,2002:js/undefined', {
  kind: 'scalar',
  resolve: resolveJavascriptUndefined,
  construct: constructJavascriptUndefined,
  predicate: isUndefined,
  represent: representJavascriptUndefined
});

var Type$17 = type;

function resolveJavascriptRegExp(data) {
  if (data === null) { return false; }
  if (data.length === 0) { return false; }

  var regexp = data,
      tail   = /\/([gim]*)$/.exec(data),
      modifiers = '';

  // if regexp starts with '/' it can have modifiers and must be properly closed
  // `/foo/gim` - modifiers tail can be maximum 3 chars
  if (regexp[0] === '/') {
    if (tail) { modifiers = tail[1]; }

    if (modifiers.length > 3) { return false; }
    // if expression starts with /, is should be properly terminated
    if (regexp[regexp.length - modifiers.length - 1] !== '/') { return false; }
  }

  return true;
}

function constructJavascriptRegExp(data) {
  var regexp = data,
      tail   = /\/([gim]*)$/.exec(data),
      modifiers = '';

  // `/foo/gim` - tail can be maximum 4 chars
  if (regexp[0] === '/') {
    if (tail) { modifiers = tail[1]; }
    regexp = regexp.slice(1, regexp.length - modifiers.length - 1);
  }

  return new RegExp(regexp, modifiers);
}

function representJavascriptRegExp(object /*, style*/) {
  var result = '/' + object.source + '/';

  if (object.global) { result += 'g'; }
  if (object.multiline) { result += 'm'; }
  if (object.ignoreCase) { result += 'i'; }

  return result;
}

function isRegExp(object) {
  return Object.prototype.toString.call(object) === '[object RegExp]';
}

var regexp = new Type$17('tag:yaml.org,2002:js/regexp', {
  kind: 'scalar',
  resolve: resolveJavascriptRegExp,
  construct: constructJavascriptRegExp,
  predicate: isRegExp,
  represent: representJavascriptRegExp
});

var esprima;

// Browserified version does not have esprima
//
// 1. For node.js just require module as deps
// 2. For browser try to require mudule via external AMD system.
//    If not found - try to fallback to window.esprima. If not
//    found too - then fail to parse.
//
try {
  // workaround to exclude package from browserify list.
  var _require$1 = commonjsRequire;
  esprima = _require$1('esprima');
} catch (_) {
  /*global window */
  if (typeof window !== 'undefined') { esprima = window.esprima; }
}

var Type$18 = type;

function resolveJavascriptFunction(data) {
  if (data === null) { return false; }

  try {
    var source = '(' + data + ')',
        ast    = esprima.parse(source, { range: true });

    if (ast.type                    !== 'Program'             ||
        ast.body.length             !== 1                     ||
        ast.body[0].type            !== 'ExpressionStatement' ||
        ast.body[0].expression.type !== 'FunctionExpression') {
      return false;
    }

    return true;
  } catch (err) {
    return false;
  }
}

function constructJavascriptFunction(data) {
  /*jslint evil:true*/

  var source = '(' + data + ')',
      ast    = esprima.parse(source, { range: true }),
      params = [],
      body;

  if (ast.type                    !== 'Program'             ||
      ast.body.length             !== 1                     ||
      ast.body[0].type            !== 'ExpressionStatement' ||
      ast.body[0].expression.type !== 'FunctionExpression') {
    throw new Error('Failed to resolve function');
  }

  ast.body[0].expression.params.forEach(function (param) {
    params.push(param.name);
  });

  body = ast.body[0].expression.body.range;

  // Esprima's ranges include the first '{' and the last '}' characters on
  // function expressions. So cut them out.
  /*eslint-disable no-new-func*/
  return new Function(params, source.slice(body[0] + 1, body[1] - 1));
}

function representJavascriptFunction(object /*, style*/) {
  return object.toString();
}

function isFunction(object) {
  return Object.prototype.toString.call(object) === '[object Function]';
}

var _function = new Type$18('tag:yaml.org,2002:js/function', {
  kind: 'scalar',
  resolve: resolveJavascriptFunction,
  construct: constructJavascriptFunction,
  predicate: isFunction,
  represent: representJavascriptFunction
});

var Schema$6 = schema;


var default_full = Schema$6.DEFAULT = new Schema$6({
  include: [
    default_safe
  ],
  explicit: [
    _undefined,
    regexp,
    _function
  ]
});

/*eslint-disable max-len,no-use-before-define*/

var common              = common$1;
var YAMLException$1       = exception;
var Mark                = mark;
var DEFAULT_SAFE_SCHEMA$1 = default_safe;
var DEFAULT_FULL_SCHEMA$1 = default_full;


var _hasOwnProperty = Object.prototype.hasOwnProperty;


var CONTEXT_FLOW_IN   = 1;
var CONTEXT_FLOW_OUT  = 2;
var CONTEXT_BLOCK_IN  = 3;
var CONTEXT_BLOCK_OUT = 4;


var CHOMPING_CLIP  = 1;
var CHOMPING_STRIP = 2;
var CHOMPING_KEEP  = 3;


var PATTERN_NON_PRINTABLE         = /[\x00-\x08\x0B\x0C\x0E-\x1F\x7F-\x84\x86-\x9F\uFFFE\uFFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]/;
var PATTERN_NON_ASCII_LINE_BREAKS = /[\x85\u2028\u2029]/;
var PATTERN_FLOW_INDICATORS       = /[,\[\]\{\}]/;
var PATTERN_TAG_HANDLE            = /^(?:!|!!|![a-z\-]+!)$/i;
var PATTERN_TAG_URI               = /^(?:!|[^,\[\]\{\}])(?:%[0-9a-f]{2}|[0-9a-z\-#;\/\?:@&=\+\$,_\.!~\*'\(\)\[\]])*$/i;


function is_EOL(c) {
  return (c === 0x0A/* LF */) || (c === 0x0D/* CR */);
}

function is_WHITE_SPACE(c) {
  return (c === 0x09/* Tab */) || (c === 0x20/* Space */);
}

function is_WS_OR_EOL(c) {
  return (c === 0x09/* Tab */) ||
         (c === 0x20/* Space */) ||
         (c === 0x0A/* LF */) ||
         (c === 0x0D/* CR */);
}

function is_FLOW_INDICATOR(c) {
  return c === 0x2C/* , */ ||
         c === 0x5B/* [ */ ||
         c === 0x5D/* ] */ ||
         c === 0x7B/* { */ ||
         c === 0x7D/* } */;
}

function fromHexCode(c) {
  var lc;

  if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {
    return c - 0x30;
  }

  /*eslint-disable no-bitwise*/
  lc = c | 0x20;

  if ((0x61/* a */ <= lc) && (lc <= 0x66/* f */)) {
    return lc - 0x61 + 10;
  }

  return -1;
}

function escapedHexLen(c) {
  if (c === 0x78/* x */) { return 2; }
  if (c === 0x75/* u */) { return 4; }
  if (c === 0x55/* U */) { return 8; }
  return 0;
}

function fromDecimalCode(c) {
  if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {
    return c - 0x30;
  }

  return -1;
}

function simpleEscapeSequence(c) {
  return (c === 0x30/* 0 */) ? '\x00' :
        (c === 0x61/* a */) ? '\x07' :
        (c === 0x62/* b */) ? '\x08' :
        (c === 0x74/* t */) ? '\x09' :
        (c === 0x09/* Tab */) ? '\x09' :
        (c === 0x6E/* n */) ? '\x0A' :
        (c === 0x76/* v */) ? '\x0B' :
        (c === 0x66/* f */) ? '\x0C' :
        (c === 0x72/* r */) ? '\x0D' :
        (c === 0x65/* e */) ? '\x1B' :
        (c === 0x20/* Space */) ? ' ' :
        (c === 0x22/* " */) ? '\x22' :
        (c === 0x2F/* / */) ? '/' :
        (c === 0x5C/* \ */) ? '\x5C' :
        (c === 0x4E/* N */) ? '\x85' :
        (c === 0x5F/* _ */) ? '\xA0' :
        (c === 0x4C/* L */) ? '\u2028' :
        (c === 0x50/* P */) ? '\u2029' : '';
}

function charFromCodepoint(c) {
  if (c <= 0xFFFF) {
    return String.fromCharCode(c);
  }
  // Encode UTF-16 surrogate pair
  // https://en.wikipedia.org/wiki/UTF-16#Code_points_U.2B010000_to_U.2B10FFFF
  return String.fromCharCode(((c - 0x010000) >> 10) + 0xD800,
                             ((c - 0x010000) & 0x03FF) + 0xDC00);
}

var simpleEscapeCheck = new Array(256); // integer, for fast access
var simpleEscapeMap = new Array(256);
for (var i = 0; i < 256; i++) {
  simpleEscapeCheck[i] = simpleEscapeSequence(i) ? 1 : 0;
  simpleEscapeMap[i] = simpleEscapeSequence(i);
}


function State(input, options) {
  this.input = input;

  this.filename  = options['filename']  || null;
  this.schema    = options['schema']    || DEFAULT_FULL_SCHEMA$1;
  this.onWarning = options['onWarning'] || null;
  this.legacy    = options['legacy']    || false;
  this.json      = options['json']      || false;
  this.listener  = options['listener']  || null;

  this.implicitTypes = this.schema.compiledImplicit;
  this.typeMap       = this.schema.compiledTypeMap;

  this.length     = input.length;
  this.position   = 0;
  this.line       = 0;
  this.lineStart  = 0;
  this.lineIndent = 0;

  this.documents = [];

  /*
  this.version;
  this.checkLineBreaks;
  this.tagMap;
  this.anchorMap;
  this.tag;
  this.anchor;
  this.kind;
  this.result;*/

}


function generateError(state, message) {
  return new YAMLException$1(
    message,
    new Mark(state.filename, state.input, state.position, state.line, (state.position - state.lineStart)));
}

function throwError(state, message) {
  throw generateError(state, message);
}

function throwWarning(state, message) {
  if (state.onWarning) {
    state.onWarning.call(null, generateError(state, message));
  }
}


var directiveHandlers = {

  YAML: function handleYamlDirective(state, name, args) {

    var match, major, minor;

    if (state.version !== null) {
      throwError(state, 'duplication of %YAML directive');
    }

    if (args.length !== 1) {
      throwError(state, 'YAML directive accepts exactly one argument');
    }

    match = /^([0-9]+)\.([0-9]+)$/.exec(args[0]);

    if (match === null) {
      throwError(state, 'ill-formed argument of the YAML directive');
    }

    major = parseInt(match[1], 10);
    minor = parseInt(match[2], 10);

    if (major !== 1) {
      throwError(state, 'unacceptable YAML version of the document');
    }

    state.version = args[0];
    state.checkLineBreaks = (minor < 2);

    if (minor !== 1 && minor !== 2) {
      throwWarning(state, 'unsupported YAML version of the document');
    }
  },

  TAG: function handleTagDirective(state, name, args) {

    var handle, prefix;

    if (args.length !== 2) {
      throwError(state, 'TAG directive accepts exactly two arguments');
    }

    handle = args[0];
    prefix = args[1];

    if (!PATTERN_TAG_HANDLE.test(handle)) {
      throwError(state, 'ill-formed tag handle (first argument) of the TAG directive');
    }

    if (_hasOwnProperty.call(state.tagMap, handle)) {
      throwError(state, 'there is a previously declared suffix for "' + handle + '" tag handle');
    }

    if (!PATTERN_TAG_URI.test(prefix)) {
      throwError(state, 'ill-formed tag prefix (second argument) of the TAG directive');
    }

    state.tagMap[handle] = prefix;
  }
};


function captureSegment(state, start, end, checkJson) {
  var _position, _length, _character, _result;

  if (start < end) {
    _result = state.input.slice(start, end);

    if (checkJson) {
      for (_position = 0, _length = _result.length;
           _position < _length;
           _position += 1) {
        _character = _result.charCodeAt(_position);
        if (!(_character === 0x09 ||
              (0x20 <= _character && _character <= 0x10FFFF))) {
          throwError(state, 'expected valid JSON character');
        }
      }
    } else if (PATTERN_NON_PRINTABLE.test(_result)) {
      throwError(state, 'the stream contains non-printable characters');
    }

    state.result += _result;
  }
}

function mergeMappings(state, destination, source, overridableKeys) {
  var sourceKeys, key, index, quantity;

  if (!common.isObject(source)) {
    throwError(state, 'cannot merge mappings; the provided source object is unacceptable');
  }

  sourceKeys = Object.keys(source);

  for (index = 0, quantity = sourceKeys.length; index < quantity; index += 1) {
    key = sourceKeys[index];

    if (!_hasOwnProperty.call(destination, key)) {
      destination[key] = source[key];
      overridableKeys[key] = true;
    }
  }
}

function storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode) {
  var index, quantity;

  keyNode = String(keyNode);

  if (_result === null) {
    _result = {};
  }

  if (keyTag === 'tag:yaml.org,2002:merge') {
    if (Array.isArray(valueNode)) {
      for (index = 0, quantity = valueNode.length; index < quantity; index += 1) {
        mergeMappings(state, _result, valueNode[index], overridableKeys);
      }
    } else {
      mergeMappings(state, _result, valueNode, overridableKeys);
    }
  } else {
    if (!state.json &&
        !_hasOwnProperty.call(overridableKeys, keyNode) &&
        _hasOwnProperty.call(_result, keyNode)) {
      throwError(state, 'duplicated mapping key');
    }
    _result[keyNode] = valueNode;
    delete overridableKeys[keyNode];
  }

  return _result;
}

function readLineBreak(state) {
  var ch;

  ch = state.input.charCodeAt(state.position);

  if (ch === 0x0A/* LF */) {
    state.position++;
  } else if (ch === 0x0D/* CR */) {
    state.position++;
    if (state.input.charCodeAt(state.position) === 0x0A/* LF */) {
      state.position++;
    }
  } else {
    throwError(state, 'a line break is expected');
  }

  state.line += 1;
  state.lineStart = state.position;
}

function skipSeparationSpace(state, allowComments, checkIndent) {
  var lineBreaks = 0,
      ch = state.input.charCodeAt(state.position);

  while (ch !== 0) {
    while (is_WHITE_SPACE(ch)) {
      ch = state.input.charCodeAt(++state.position);
    }

    if (allowComments && ch === 0x23/* # */) {
      do {
        ch = state.input.charCodeAt(++state.position);
      } while (ch !== 0x0A/* LF */ && ch !== 0x0D/* CR */ && ch !== 0);
    }

    if (is_EOL(ch)) {
      readLineBreak(state);

      ch = state.input.charCodeAt(state.position);
      lineBreaks++;
      state.lineIndent = 0;

      while (ch === 0x20/* Space */) {
        state.lineIndent++;
        ch = state.input.charCodeAt(++state.position);
      }
    } else {
      break;
    }
  }

  if (checkIndent !== -1 && lineBreaks !== 0 && state.lineIndent < checkIndent) {
    throwWarning(state, 'deficient indentation');
  }

  return lineBreaks;
}

function testDocumentSeparator(state) {
  var _position = state.position,
      ch;

  ch = state.input.charCodeAt(_position);

  // Condition state.position === state.lineStart is tested
  // in parent on each call, for efficiency. No needs to test here again.
  if ((ch === 0x2D/* - */ || ch === 0x2E/* . */) &&
      ch === state.input.charCodeAt(_position + 1) &&
      ch === state.input.charCodeAt(_position + 2)) {

    _position += 3;

    ch = state.input.charCodeAt(_position);

    if (ch === 0 || is_WS_OR_EOL(ch)) {
      return true;
    }
  }

  return false;
}

function writeFoldedLines(state, count) {
  if (count === 1) {
    state.result += ' ';
  } else if (count > 1) {
    state.result += common.repeat('\n', count - 1);
  }
}


function readPlainScalar(state, nodeIndent, withinFlowCollection) {
  var preceding,
      following,
      captureStart,
      captureEnd,
      hasPendingContent,
      _line,
      _lineStart,
      _lineIndent,
      _kind = state.kind,
      _result = state.result,
      ch;

  ch = state.input.charCodeAt(state.position);

  if (is_WS_OR_EOL(ch)      ||
      is_FLOW_INDICATOR(ch) ||
      ch === 0x23/* # */    ||
      ch === 0x26/* & */    ||
      ch === 0x2A/* * */    ||
      ch === 0x21/* ! */    ||
      ch === 0x7C/* | */    ||
      ch === 0x3E/* > */    ||
      ch === 0x27/* ' */    ||
      ch === 0x22/* " */    ||
      ch === 0x25/* % */    ||
      ch === 0x40/* @ */    ||
      ch === 0x60/* ` */) {
    return false;
  }

  if (ch === 0x3F/* ? */ || ch === 0x2D/* - */) {
    following = state.input.charCodeAt(state.position + 1);

    if (is_WS_OR_EOL(following) ||
        withinFlowCollection && is_FLOW_INDICATOR(following)) {
      return false;
    }
  }

  state.kind = 'scalar';
  state.result = '';
  captureStart = captureEnd = state.position;
  hasPendingContent = false;

  while (ch !== 0) {
    if (ch === 0x3A/* : */) {
      following = state.input.charCodeAt(state.position + 1);

      if (is_WS_OR_EOL(following) ||
          withinFlowCollection && is_FLOW_INDICATOR(following)) {
        break;
      }

    } else if (ch === 0x23/* # */) {
      preceding = state.input.charCodeAt(state.position - 1);

      if (is_WS_OR_EOL(preceding)) {
        break;
      }

    } else if ((state.position === state.lineStart && testDocumentSeparator(state)) ||
               withinFlowCollection && is_FLOW_INDICATOR(ch)) {
      break;

    } else if (is_EOL(ch)) {
      _line = state.line;
      _lineStart = state.lineStart;
      _lineIndent = state.lineIndent;
      skipSeparationSpace(state, false, -1);

      if (state.lineIndent >= nodeIndent) {
        hasPendingContent = true;
        ch = state.input.charCodeAt(state.position);
        continue;
      } else {
        state.position = captureEnd;
        state.line = _line;
        state.lineStart = _lineStart;
        state.lineIndent = _lineIndent;
        break;
      }
    }

    if (hasPendingContent) {
      captureSegment(state, captureStart, captureEnd, false);
      writeFoldedLines(state, state.line - _line);
      captureStart = captureEnd = state.position;
      hasPendingContent = false;
    }

    if (!is_WHITE_SPACE(ch)) {
      captureEnd = state.position + 1;
    }

    ch = state.input.charCodeAt(++state.position);
  }

  captureSegment(state, captureStart, captureEnd, false);

  if (state.result) {
    return true;
  }

  state.kind = _kind;
  state.result = _result;
  return false;
}

function readSingleQuotedScalar(state, nodeIndent) {
  var ch,
      captureStart, captureEnd;

  ch = state.input.charCodeAt(state.position);

  if (ch !== 0x27/* ' */) {
    return false;
  }

  state.kind = 'scalar';
  state.result = '';
  state.position++;
  captureStart = captureEnd = state.position;

  while ((ch = state.input.charCodeAt(state.position)) !== 0) {
    if (ch === 0x27/* ' */) {
      captureSegment(state, captureStart, state.position, true);
      ch = state.input.charCodeAt(++state.position);

      if (ch === 0x27/* ' */) {
        captureStart = state.position;
        state.position++;
        captureEnd = state.position;
      } else {
        return true;
      }

    } else if (is_EOL(ch)) {
      captureSegment(state, captureStart, captureEnd, true);
      writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));
      captureStart = captureEnd = state.position;

    } else if (state.position === state.lineStart && testDocumentSeparator(state)) {
      throwError(state, 'unexpected end of the document within a single quoted scalar');

    } else {
      state.position++;
      captureEnd = state.position;
    }
  }

  throwError(state, 'unexpected end of the stream within a single quoted scalar');
}

function readDoubleQuotedScalar(state, nodeIndent) {
  var captureStart,
      captureEnd,
      hexLength,
      hexResult,
      tmp,
      ch;

  ch = state.input.charCodeAt(state.position);

  if (ch !== 0x22/* " */) {
    return false;
  }

  state.kind = 'scalar';
  state.result = '';
  state.position++;
  captureStart = captureEnd = state.position;

  while ((ch = state.input.charCodeAt(state.position)) !== 0) {
    if (ch === 0x22/* " */) {
      captureSegment(state, captureStart, state.position, true);
      state.position++;
      return true;

    } else if (ch === 0x5C/* \ */) {
      captureSegment(state, captureStart, state.position, true);
      ch = state.input.charCodeAt(++state.position);

      if (is_EOL(ch)) {
        skipSeparationSpace(state, false, nodeIndent);

        // TODO: rework to inline fn with no type cast?
      } else if (ch < 256 && simpleEscapeCheck[ch]) {
        state.result += simpleEscapeMap[ch];
        state.position++;

      } else if ((tmp = escapedHexLen(ch)) > 0) {
        hexLength = tmp;
        hexResult = 0;

        for (; hexLength > 0; hexLength--) {
          ch = state.input.charCodeAt(++state.position);

          if ((tmp = fromHexCode(ch)) >= 0) {
            hexResult = (hexResult << 4) + tmp;

          } else {
            throwError(state, 'expected hexadecimal character');
          }
        }

        state.result += charFromCodepoint(hexResult);

        state.position++;

      } else {
        throwError(state, 'unknown escape sequence');
      }

      captureStart = captureEnd = state.position;

    } else if (is_EOL(ch)) {
      captureSegment(state, captureStart, captureEnd, true);
      writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));
      captureStart = captureEnd = state.position;

    } else if (state.position === state.lineStart && testDocumentSeparator(state)) {
      throwError(state, 'unexpected end of the document within a double quoted scalar');

    } else {
      state.position++;
      captureEnd = state.position;
    }
  }

  throwError(state, 'unexpected end of the stream within a double quoted scalar');
}

function readFlowCollection(state, nodeIndent) {
  var readNext = true,
      _line,
      _tag     = state.tag,
      _result,
      _anchor  = state.anchor,
      following,
      terminator,
      isPair,
      isExplicitPair,
      isMapping,
      overridableKeys = {},
      keyNode,
      keyTag,
      valueNode,
      ch;

  ch = state.input.charCodeAt(state.position);

  if (ch === 0x5B/* [ */) {
    terminator = 0x5D;/* ] */
    isMapping = false;
    _result = [];
  } else if (ch === 0x7B/* { */) {
    terminator = 0x7D;/* } */
    isMapping = true;
    _result = {};
  } else {
    return false;
  }

  if (state.anchor !== null) {
    state.anchorMap[state.anchor] = _result;
  }

  ch = state.input.charCodeAt(++state.position);

  while (ch !== 0) {
    skipSeparationSpace(state, true, nodeIndent);

    ch = state.input.charCodeAt(state.position);

    if (ch === terminator) {
      state.position++;
      state.tag = _tag;
      state.anchor = _anchor;
      state.kind = isMapping ? 'mapping' : 'sequence';
      state.result = _result;
      return true;
    } else if (!readNext) {
      throwError(state, 'missed comma between flow collection entries');
    }

    keyTag = keyNode = valueNode = null;
    isPair = isExplicitPair = false;

    if (ch === 0x3F/* ? */) {
      following = state.input.charCodeAt(state.position + 1);

      if (is_WS_OR_EOL(following)) {
        isPair = isExplicitPair = true;
        state.position++;
        skipSeparationSpace(state, true, nodeIndent);
      }
    }

    _line = state.line;
    composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);
    keyTag = state.tag;
    keyNode = state.result;
    skipSeparationSpace(state, true, nodeIndent);

    ch = state.input.charCodeAt(state.position);

    if ((isExplicitPair || state.line === _line) && ch === 0x3A/* : */) {
      isPair = true;
      ch = state.input.charCodeAt(++state.position);
      skipSeparationSpace(state, true, nodeIndent);
      composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);
      valueNode = state.result;
    }

    if (isMapping) {
      storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode);
    } else if (isPair) {
      _result.push(storeMappingPair(state, null, overridableKeys, keyTag, keyNode, valueNode));
    } else {
      _result.push(keyNode);
    }

    skipSeparationSpace(state, true, nodeIndent);

    ch = state.input.charCodeAt(state.position);

    if (ch === 0x2C/* , */) {
      readNext = true;
      ch = state.input.charCodeAt(++state.position);
    } else {
      readNext = false;
    }
  }

  throwError(state, 'unexpected end of the stream within a flow collection');
}

function readBlockScalar(state, nodeIndent) {
  var captureStart,
      folding,
      chomping       = CHOMPING_CLIP,
      didReadContent = false,
      detectedIndent = false,
      textIndent     = nodeIndent,
      emptyLines     = 0,
      atMoreIndented = false,
      tmp,
      ch;

  ch = state.input.charCodeAt(state.position);

  if (ch === 0x7C/* | */) {
    folding = false;
  } else if (ch === 0x3E/* > */) {
    folding = true;
  } else {
    return false;
  }

  state.kind = 'scalar';
  state.result = '';

  while (ch !== 0) {
    ch = state.input.charCodeAt(++state.position);

    if (ch === 0x2B/* + */ || ch === 0x2D/* - */) {
      if (CHOMPING_CLIP === chomping) {
        chomping = (ch === 0x2B/* + */) ? CHOMPING_KEEP : CHOMPING_STRIP;
      } else {
        throwError(state, 'repeat of a chomping mode identifier');
      }

    } else if ((tmp = fromDecimalCode(ch)) >= 0) {
      if (tmp === 0) {
        throwError(state, 'bad explicit indentation width of a block scalar; it cannot be less than one');
      } else if (!detectedIndent) {
        textIndent = nodeIndent + tmp - 1;
        detectedIndent = true;
      } else {
        throwError(state, 'repeat of an indentation width identifier');
      }

    } else {
      break;
    }
  }

  if (is_WHITE_SPACE(ch)) {
    do { ch = state.input.charCodeAt(++state.position); }
    while (is_WHITE_SPACE(ch));

    if (ch === 0x23/* # */) {
      do { ch = state.input.charCodeAt(++state.position); }
      while (!is_EOL(ch) && (ch !== 0));
    }
  }

  while (ch !== 0) {
    readLineBreak(state);
    state.lineIndent = 0;

    ch = state.input.charCodeAt(state.position);

    while ((!detectedIndent || state.lineIndent < textIndent) &&
           (ch === 0x20/* Space */)) {
      state.lineIndent++;
      ch = state.input.charCodeAt(++state.position);
    }

    if (!detectedIndent && state.lineIndent > textIndent) {
      textIndent = state.lineIndent;
    }

    if (is_EOL(ch)) {
      emptyLines++;
      continue;
    }

    // End of the scalar.
    if (state.lineIndent < textIndent) {

      // Perform the chomping.
      if (chomping === CHOMPING_KEEP) {
        state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines);
      } else if (chomping === CHOMPING_CLIP) {
        if (didReadContent) { // i.e. only if the scalar is not empty.
          state.result += '\n';
        }
      }

      // Break this `while` cycle and go to the funciton's epilogue.
      break;
    }

    // Folded style: use fancy rules to handle line breaks.
    if (folding) {

      // Lines starting with white space characters (more-indented lines) are not folded.
      if (is_WHITE_SPACE(ch)) {
        atMoreIndented = true;
        // except for the first content line (cf. Example 8.1)
        state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines);

      // End of more-indented block.
      } else if (atMoreIndented) {
        atMoreIndented = false;
        state.result += common.repeat('\n', emptyLines + 1);

      // Just one line break - perceive as the same line.
      } else if (emptyLines === 0) {
        if (didReadContent) { // i.e. only if we have already read some scalar content.
          state.result += ' ';
        }

      // Several line breaks - perceive as different lines.
      } else {
        state.result += common.repeat('\n', emptyLines);
      }

    // Literal style: just add exact number of line breaks between content lines.
    } else {
      // Keep all line breaks except the header line break.
      state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines);
    }

    didReadContent = true;
    detectedIndent = true;
    emptyLines = 0;
    captureStart = state.position;

    while (!is_EOL(ch) && (ch !== 0)) {
      ch = state.input.charCodeAt(++state.position);
    }

    captureSegment(state, captureStart, state.position, false);
  }

  return true;
}

function readBlockSequence(state, nodeIndent) {
  var _line,
      _tag      = state.tag,
      _anchor   = state.anchor,
      _result   = [],
      following,
      detected  = false,
      ch;

  if (state.anchor !== null) {
    state.anchorMap[state.anchor] = _result;
  }

  ch = state.input.charCodeAt(state.position);

  while (ch !== 0) {

    if (ch !== 0x2D/* - */) {
      break;
    }

    following = state.input.charCodeAt(state.position + 1);

    if (!is_WS_OR_EOL(following)) {
      break;
    }

    detected = true;
    state.position++;

    if (skipSeparationSpace(state, true, -1)) {
      if (state.lineIndent <= nodeIndent) {
        _result.push(null);
        ch = state.input.charCodeAt(state.position);
        continue;
      }
    }

    _line = state.line;
    composeNode(state, nodeIndent, CONTEXT_BLOCK_IN, false, true);
    _result.push(state.result);
    skipSeparationSpace(state, true, -1);

    ch = state.input.charCodeAt(state.position);

    if ((state.line === _line || state.lineIndent > nodeIndent) && (ch !== 0)) {
      throwError(state, 'bad indentation of a sequence entry');
    } else if (state.lineIndent < nodeIndent) {
      break;
    }
  }

  if (detected) {
    state.tag = _tag;
    state.anchor = _anchor;
    state.kind = 'sequence';
    state.result = _result;
    return true;
  }
  return false;
}

function readBlockMapping(state, nodeIndent, flowIndent) {
  var following,
      allowCompact,
      _line,
      _tag          = state.tag,
      _anchor       = state.anchor,
      _result       = {},
      overridableKeys = {},
      keyTag        = null,
      keyNode       = null,
      valueNode     = null,
      atExplicitKey = false,
      detected      = false,
      ch;

  if (state.anchor !== null) {
    state.anchorMap[state.anchor] = _result;
  }

  ch = state.input.charCodeAt(state.position);

  while (ch !== 0) {
    following = state.input.charCodeAt(state.position + 1);
    _line = state.line; // Save the current line.

    //
    // Explicit notation case. There are two separate blocks:
    // first for the key (denoted by "?") and second for the value (denoted by ":")
    //
    if ((ch === 0x3F/* ? */ || ch === 0x3A/* : */) && is_WS_OR_EOL(following)) {

      if (ch === 0x3F/* ? */) {
        if (atExplicitKey) {
          storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null);
          keyTag = keyNode = valueNode = null;
        }

        detected = true;
        atExplicitKey = true;
        allowCompact = true;

      } else if (atExplicitKey) {
        // i.e. 0x3A/* : */ === character after the explicit key.
        atExplicitKey = false;
        allowCompact = true;

      } else {
        throwError(state, 'incomplete explicit mapping pair; a key node is missed');
      }

      state.position += 1;
      ch = following;

    //
    // Implicit notation case. Flow-style node as the key first, then ":", and the value.
    //
    } else if (composeNode(state, flowIndent, CONTEXT_FLOW_OUT, false, true)) {

      if (state.line === _line) {
        ch = state.input.charCodeAt(state.position);

        while (is_WHITE_SPACE(ch)) {
          ch = state.input.charCodeAt(++state.position);
        }

        if (ch === 0x3A/* : */) {
          ch = state.input.charCodeAt(++state.position);

          if (!is_WS_OR_EOL(ch)) {
            throwError(state, 'a whitespace character is expected after the key-value separator within a block mapping');
          }

          if (atExplicitKey) {
            storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null);
            keyTag = keyNode = valueNode = null;
          }

          detected = true;
          atExplicitKey = false;
          allowCompact = false;
          keyTag = state.tag;
          keyNode = state.result;

        } else if (detected) {
          throwError(state, 'can not read an implicit mapping pair; a colon is missed');

        } else {
          state.tag = _tag;
          state.anchor = _anchor;
          return true; // Keep the result of `composeNode`.
        }

      } else if (detected) {
        throwError(state, 'can not read a block mapping entry; a multiline key may not be an implicit key');

      } else {
        state.tag = _tag;
        state.anchor = _anchor;
        return true; // Keep the result of `composeNode`.
      }

    } else {
      break; // Reading is done. Go to the epilogue.
    }

    //
    // Common reading code for both explicit and implicit notations.
    //
    if (state.line === _line || state.lineIndent > nodeIndent) {
      if (composeNode(state, nodeIndent, CONTEXT_BLOCK_OUT, true, allowCompact)) {
        if (atExplicitKey) {
          keyNode = state.result;
        } else {
          valueNode = state.result;
        }
      }

      if (!atExplicitKey) {
        storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode);
        keyTag = keyNode = valueNode = null;
      }

      skipSeparationSpace(state, true, -1);
      ch = state.input.charCodeAt(state.position);
    }

    if (state.lineIndent > nodeIndent && (ch !== 0)) {
      throwError(state, 'bad indentation of a mapping entry');
    } else if (state.lineIndent < nodeIndent) {
      break;
    }
  }

  //
  // Epilogue.
  //

  // Special case: last mapping's node contains only the key in explicit notation.
  if (atExplicitKey) {
    storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null);
  }

  // Expose the resulting mapping.
  if (detected) {
    state.tag = _tag;
    state.anchor = _anchor;
    state.kind = 'mapping';
    state.result = _result;
  }

  return detected;
}

function readTagProperty(state) {
  var _position,
      isVerbatim = false,
      isNamed    = false,
      tagHandle,
      tagName,
      ch;

  ch = state.input.charCodeAt(state.position);

  if (ch !== 0x21/* ! */) { return false; }

  if (state.tag !== null) {
    throwError(state, 'duplication of a tag property');
  }

  ch = state.input.charCodeAt(++state.position);

  if (ch === 0x3C/* < */) {
    isVerbatim = true;
    ch = state.input.charCodeAt(++state.position);

  } else if (ch === 0x21/* ! */) {
    isNamed = true;
    tagHandle = '!!';
    ch = state.input.charCodeAt(++state.position);

  } else {
    tagHandle = '!';
  }

  _position = state.position;

  if (isVerbatim) {
    do { ch = state.input.charCodeAt(++state.position); }
    while (ch !== 0 && ch !== 0x3E/* > */);

    if (state.position < state.length) {
      tagName = state.input.slice(_position, state.position);
      ch = state.input.charCodeAt(++state.position);
    } else {
      throwError(state, 'unexpected end of the stream within a verbatim tag');
    }
  } else {
    while (ch !== 0 && !is_WS_OR_EOL(ch)) {

      if (ch === 0x21/* ! */) {
        if (!isNamed) {
          tagHandle = state.input.slice(_position - 1, state.position + 1);

          if (!PATTERN_TAG_HANDLE.test(tagHandle)) {
            throwError(state, 'named tag handle cannot contain such characters');
          }

          isNamed = true;
          _position = state.position + 1;
        } else {
          throwError(state, 'tag suffix cannot contain exclamation marks');
        }
      }

      ch = state.input.charCodeAt(++state.position);
    }

    tagName = state.input.slice(_position, state.position);

    if (PATTERN_FLOW_INDICATORS.test(tagName)) {
      throwError(state, 'tag suffix cannot contain flow indicator characters');
    }
  }

  if (tagName && !PATTERN_TAG_URI.test(tagName)) {
    throwError(state, 'tag name cannot contain such characters: ' + tagName);
  }

  if (isVerbatim) {
    state.tag = tagName;

  } else if (_hasOwnProperty.call(state.tagMap, tagHandle)) {
    state.tag = state.tagMap[tagHandle] + tagName;

  } else if (tagHandle === '!') {
    state.tag = '!' + tagName;

  } else if (tagHandle === '!!') {
    state.tag = 'tag:yaml.org,2002:' + tagName;

  } else {
    throwError(state, 'undeclared tag handle "' + tagHandle + '"');
  }

  return true;
}

function readAnchorProperty(state) {
  var _position,
      ch;

  ch = state.input.charCodeAt(state.position);

  if (ch !== 0x26/* & */) { return false; }

  if (state.anchor !== null) {
    throwError(state, 'duplication of an anchor property');
  }

  ch = state.input.charCodeAt(++state.position);
  _position = state.position;

  while (ch !== 0 && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {
    ch = state.input.charCodeAt(++state.position);
  }

  if (state.position === _position) {
    throwError(state, 'name of an anchor node must contain at least one character');
  }

  state.anchor = state.input.slice(_position, state.position);
  return true;
}

function readAlias(state) {
  var _position, alias,
      ch;

  ch = state.input.charCodeAt(state.position);

  if (ch !== 0x2A/* * */) { return false; }

  ch = state.input.charCodeAt(++state.position);
  _position = state.position;

  while (ch !== 0 && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {
    ch = state.input.charCodeAt(++state.position);
  }

  if (state.position === _position) {
    throwError(state, 'name of an alias node must contain at least one character');
  }

  alias = state.input.slice(_position, state.position);

  if (!state.anchorMap.hasOwnProperty(alias)) {
    throwError(state, 'unidentified alias "' + alias + '"');
  }

  state.result = state.anchorMap[alias];
  skipSeparationSpace(state, true, -1);
  return true;
}

function composeNode(state, parentIndent, nodeContext, allowToSeek, allowCompact) {
  var allowBlockStyles,
      allowBlockScalars,
      allowBlockCollections,
      indentStatus = 1, // 1: this>parent, 0: this=parent, -1: this<parent
      atNewLine  = false,
      hasContent = false,
      typeIndex,
      typeQuantity,
      type,
      flowIndent,
      blockIndent;

  if (state.listener !== null) {
    state.listener('open', state);
  }

  state.tag    = null;
  state.anchor = null;
  state.kind   = null;
  state.result = null;

  allowBlockStyles = allowBlockScalars = allowBlockCollections =
    CONTEXT_BLOCK_OUT === nodeContext ||
    CONTEXT_BLOCK_IN  === nodeContext;

  if (allowToSeek) {
    if (skipSeparationSpace(state, true, -1)) {
      atNewLine = true;

      if (state.lineIndent > parentIndent) {
        indentStatus = 1;
      } else if (state.lineIndent === parentIndent) {
        indentStatus = 0;
      } else if (state.lineIndent < parentIndent) {
        indentStatus = -1;
      }
    }
  }

  if (indentStatus === 1) {
    while (readTagProperty(state) || readAnchorProperty(state)) {
      if (skipSeparationSpace(state, true, -1)) {
        atNewLine = true;
        allowBlockCollections = allowBlockStyles;

        if (state.lineIndent > parentIndent) {
          indentStatus = 1;
        } else if (state.lineIndent === parentIndent) {
          indentStatus = 0;
        } else if (state.lineIndent < parentIndent) {
          indentStatus = -1;
        }
      } else {
        allowBlockCollections = false;
      }
    }
  }

  if (allowBlockCollections) {
    allowBlockCollections = atNewLine || allowCompact;
  }

  if (indentStatus === 1 || CONTEXT_BLOCK_OUT === nodeContext) {
    if (CONTEXT_FLOW_IN === nodeContext || CONTEXT_FLOW_OUT === nodeContext) {
      flowIndent = parentIndent;
    } else {
      flowIndent = parentIndent + 1;
    }

    blockIndent = state.position - state.lineStart;

    if (indentStatus === 1) {
      if (allowBlockCollections &&
          (readBlockSequence(state, blockIndent) ||
           readBlockMapping(state, blockIndent, flowIndent)) ||
          readFlowCollection(state, flowIndent)) {
        hasContent = true;
      } else {
        if ((allowBlockScalars && readBlockScalar(state, flowIndent)) ||
            readSingleQuotedScalar(state, flowIndent) ||
            readDoubleQuotedScalar(state, flowIndent)) {
          hasContent = true;

        } else if (readAlias(state)) {
          hasContent = true;

          if (state.tag !== null || state.anchor !== null) {
            throwError(state, 'alias node should not have any properties');
          }

        } else if (readPlainScalar(state, flowIndent, CONTEXT_FLOW_IN === nodeContext)) {
          hasContent = true;

          if (state.tag === null) {
            state.tag = '?';
          }
        }

        if (state.anchor !== null) {
          state.anchorMap[state.anchor] = state.result;
        }
      }
    } else if (indentStatus === 0) {
      // Special case: block sequences are allowed to have same indentation level as the parent.
      // http://www.yaml.org/spec/1.2/spec.html#id2799784
      hasContent = allowBlockCollections && readBlockSequence(state, blockIndent);
    }
  }

  if (state.tag !== null && state.tag !== '!') {
    if (state.tag === '?') {
      for (typeIndex = 0, typeQuantity = state.implicitTypes.length;
           typeIndex < typeQuantity;
           typeIndex += 1) {
        type = state.implicitTypes[typeIndex];

        // Implicit resolving is not allowed for non-scalar types, and '?'
        // non-specific tag is only assigned to plain scalars. So, it isn't
        // needed to check for 'kind' conformity.

        if (type.resolve(state.result)) { // `state.result` updated in resolver if matched
          state.result = type.construct(state.result);
          state.tag = type.tag;
          if (state.anchor !== null) {
            state.anchorMap[state.anchor] = state.result;
          }
          break;
        }
      }
    } else if (_hasOwnProperty.call(state.typeMap[state.kind || 'fallback'], state.tag)) {
      type = state.typeMap[state.kind || 'fallback'][state.tag];

      if (state.result !== null && type.kind !== state.kind) {
        throwError(state, 'unacceptable node kind for !<' + state.tag + '> tag; it should be "' + type.kind + '", not "' + state.kind + '"');
      }

      if (!type.resolve(state.result)) { // `state.result` updated in resolver if matched
        throwError(state, 'cannot resolve a node with !<' + state.tag + '> explicit tag');
      } else {
        state.result = type.construct(state.result);
        if (state.anchor !== null) {
          state.anchorMap[state.anchor] = state.result;
        }
      }
    } else {
      throwError(state, 'unknown tag !<' + state.tag + '>');
    }
  }

  if (state.listener !== null) {
    state.listener('close', state);
  }
  return state.tag !== null ||  state.anchor !== null || hasContent;
}

function readDocument(state) {
  var documentStart = state.position,
      _position,
      directiveName,
      directiveArgs,
      hasDirectives = false,
      ch;

  state.version = null;
  state.checkLineBreaks = state.legacy;
  state.tagMap = {};
  state.anchorMap = {};

  while ((ch = state.input.charCodeAt(state.position)) !== 0) {
    skipSeparationSpace(state, true, -1);

    ch = state.input.charCodeAt(state.position);

    if (state.lineIndent > 0 || ch !== 0x25/* % */) {
      break;
    }

    hasDirectives = true;
    ch = state.input.charCodeAt(++state.position);
    _position = state.position;

    while (ch !== 0 && !is_WS_OR_EOL(ch)) {
      ch = state.input.charCodeAt(++state.position);
    }

    directiveName = state.input.slice(_position, state.position);
    directiveArgs = [];

    if (directiveName.length < 1) {
      throwError(state, 'directive name must not be less than one character in length');
    }

    while (ch !== 0) {
      while (is_WHITE_SPACE(ch)) {
        ch = state.input.charCodeAt(++state.position);
      }

      if (ch === 0x23/* # */) {
        do { ch = state.input.charCodeAt(++state.position); }
        while (ch !== 0 && !is_EOL(ch));
        break;
      }

      if (is_EOL(ch)) { break; }

      _position = state.position;

      while (ch !== 0 && !is_WS_OR_EOL(ch)) {
        ch = state.input.charCodeAt(++state.position);
      }

      directiveArgs.push(state.input.slice(_position, state.position));
    }

    if (ch !== 0) { readLineBreak(state); }

    if (_hasOwnProperty.call(directiveHandlers, directiveName)) {
      directiveHandlers[directiveName](state, directiveName, directiveArgs);
    } else {
      throwWarning(state, 'unknown document directive "' + directiveName + '"');
    }
  }

  skipSeparationSpace(state, true, -1);

  if (state.lineIndent === 0 &&
      state.input.charCodeAt(state.position)     === 0x2D/* - */ &&
      state.input.charCodeAt(state.position + 1) === 0x2D/* - */ &&
      state.input.charCodeAt(state.position + 2) === 0x2D/* - */) {
    state.position += 3;
    skipSeparationSpace(state, true, -1);

  } else if (hasDirectives) {
    throwError(state, 'directives end mark is expected');
  }

  composeNode(state, state.lineIndent - 1, CONTEXT_BLOCK_OUT, false, true);
  skipSeparationSpace(state, true, -1);

  if (state.checkLineBreaks &&
      PATTERN_NON_ASCII_LINE_BREAKS.test(state.input.slice(documentStart, state.position))) {
    throwWarning(state, 'non-ASCII line breaks are interpreted as content');
  }

  state.documents.push(state.result);

  if (state.position === state.lineStart && testDocumentSeparator(state)) {

    if (state.input.charCodeAt(state.position) === 0x2E/* . */) {
      state.position += 3;
      skipSeparationSpace(state, true, -1);
    }
    return;
  }

  if (state.position < (state.length - 1)) {
    throwError(state, 'end of the stream or a document separator is expected');
  } else {
    return;
  }
}


function loadDocuments(input, options) {
  input = String(input);
  options = options || {};

  if (input.length !== 0) {

    // Add tailing `\n` if not exists
    if (input.charCodeAt(input.length - 1) !== 0x0A/* LF */ &&
        input.charCodeAt(input.length - 1) !== 0x0D/* CR */) {
      input += '\n';
    }

    // Strip BOM
    if (input.charCodeAt(0) === 0xFEFF) {
      input = input.slice(1);
    }
  }

  var state = new State(input, options);

  // Use 0 as string terminator. That significantly simplifies bounds check.
  state.input += '\0';

  while (state.input.charCodeAt(state.position) === 0x20/* Space */) {
    state.lineIndent += 1;
    state.position += 1;
  }

  while (state.position < (state.length - 1)) {
    readDocument(state);
  }

  return state.documents;
}


function loadAll$1(input, iterator, options) {
  var documents = loadDocuments(input, options), index, length;

  for (index = 0, length = documents.length; index < length; index += 1) {
    iterator(documents[index]);
  }
}


function load$1(input, options) {
  var documents = loadDocuments(input, options);

  if (documents.length === 0) {
    /*eslint-disable no-undefined*/
    return undefined;
  } else if (documents.length === 1) {
    return documents[0];
  }
  throw new YAMLException$1('expected a single document in the stream, but found more');
}


function safeLoadAll$1(input, output, options) {
  loadAll$1(input, output, common.extend({ schema: DEFAULT_SAFE_SCHEMA$1 }, options));
}


function safeLoad$1(input, options) {
  return load$1(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA$1 }, options));
}


var loadAll_1 = loadAll$1;
var load_1 = load$1;
var safeLoadAll_1 = safeLoadAll$1;
var safeLoad_1 = safeLoad$1;

var loader$1 = {
	loadAll: loadAll_1,
	load: load_1,
	safeLoadAll: safeLoadAll_1,
	safeLoad: safeLoad_1
};

/*eslint-disable no-use-before-define*/

var common$7              = common$1;
var YAMLException$5       = exception;
var DEFAULT_FULL_SCHEMA$2 = default_full;
var DEFAULT_SAFE_SCHEMA$2 = default_safe;

var _toString$2       = Object.prototype.toString;
var _hasOwnProperty$3 = Object.prototype.hasOwnProperty;

var CHAR_TAB                  = 0x09; /* Tab */
var CHAR_LINE_FEED            = 0x0A; /* LF */
var CHAR_SPACE                = 0x20; /* Space */
var CHAR_EXCLAMATION          = 0x21; /* ! */
var CHAR_DOUBLE_QUOTE         = 0x22; /* " */
var CHAR_SHARP                = 0x23; /* # */
var CHAR_PERCENT              = 0x25; /* % */
var CHAR_AMPERSAND            = 0x26; /* & */
var CHAR_SINGLE_QUOTE         = 0x27; /* ' */
var CHAR_ASTERISK             = 0x2A; /* * */
var CHAR_COMMA                = 0x2C; /* , */
var CHAR_MINUS                = 0x2D; /* - */
var CHAR_COLON                = 0x3A; /* : */
var CHAR_GREATER_THAN         = 0x3E; /* > */
var CHAR_QUESTION             = 0x3F; /* ? */
var CHAR_COMMERCIAL_AT        = 0x40; /* @ */
var CHAR_LEFT_SQUARE_BRACKET  = 0x5B; /* [ */
var CHAR_RIGHT_SQUARE_BRACKET = 0x5D; /* ] */
var CHAR_GRAVE_ACCENT         = 0x60; /* ` */
var CHAR_LEFT_CURLY_BRACKET   = 0x7B; /* { */
var CHAR_VERTICAL_LINE        = 0x7C; /* | */
var CHAR_RIGHT_CURLY_BRACKET  = 0x7D; /* } */

var ESCAPE_SEQUENCES = {};

ESCAPE_SEQUENCES[0x00]   = '\\0';
ESCAPE_SEQUENCES[0x07]   = '\\a';
ESCAPE_SEQUENCES[0x08]   = '\\b';
ESCAPE_SEQUENCES[0x09]   = '\\t';
ESCAPE_SEQUENCES[0x0A]   = '\\n';
ESCAPE_SEQUENCES[0x0B]   = '\\v';
ESCAPE_SEQUENCES[0x0C]   = '\\f';
ESCAPE_SEQUENCES[0x0D]   = '\\r';
ESCAPE_SEQUENCES[0x1B]   = '\\e';
ESCAPE_SEQUENCES[0x22]   = '\\"';
ESCAPE_SEQUENCES[0x5C]   = '\\\\';
ESCAPE_SEQUENCES[0x85]   = '\\N';
ESCAPE_SEQUENCES[0xA0]   = '\\_';
ESCAPE_SEQUENCES[0x2028] = '\\L';
ESCAPE_SEQUENCES[0x2029] = '\\P';

var DEPRECATED_BOOLEANS_SYNTAX = [
  'y', 'Y', 'yes', 'Yes', 'YES', 'on', 'On', 'ON',
  'n', 'N', 'no', 'No', 'NO', 'off', 'Off', 'OFF'
];

function compileStyleMap(schema, map) {
  var result, keys, index, length, tag, style, type;

  if (map === null) { return {}; }

  result = {};
  keys = Object.keys(map);

  for (index = 0, length = keys.length; index < length; index += 1) {
    tag = keys[index];
    style = String(map[tag]);

    if (tag.slice(0, 2) === '!!') {
      tag = 'tag:yaml.org,2002:' + tag.slice(2);
    }
    type = schema.compiledTypeMap['fallback'][tag];

    if (type && _hasOwnProperty$3.call(type.styleAliases, style)) {
      style = type.styleAliases[style];
    }

    result[tag] = style;
  }

  return result;
}

function encodeHex(character) {
  var string, handle, length;

  string = character.toString(16).toUpperCase();

  if (character <= 0xFF) {
    handle = 'x';
    length = 2;
  } else if (character <= 0xFFFF) {
    handle = 'u';
    length = 4;
  } else if (character <= 0xFFFFFFFF) {
    handle = 'U';
    length = 8;
  } else {
    throw new YAMLException$5('code point within a string may not be greater than 0xFFFFFFFF');
  }

  return '\\' + handle + common$7.repeat('0', length - string.length) + string;
}

function State$1(options) {
  this.schema       = options['schema'] || DEFAULT_FULL_SCHEMA$2;
  this.indent       = Math.max(1, (options['indent'] || 2));
  this.skipInvalid  = options['skipInvalid'] || false;
  this.flowLevel    = (common$7.isNothing(options['flowLevel']) ? -1 : options['flowLevel']);
  this.styleMap     = compileStyleMap(this.schema, options['styles'] || null);
  this.sortKeys     = options['sortKeys'] || false;
  this.lineWidth    = options['lineWidth'] || 80;
  this.noRefs       = options['noRefs'] || false;
  this.noCompatMode = options['noCompatMode'] || false;

  this.implicitTypes = this.schema.compiledImplicit;
  this.explicitTypes = this.schema.compiledExplicit;

  this.tag = null;
  this.result = '';

  this.duplicates = [];
  this.usedDuplicates = null;
}

// Indents every line in a string. Empty lines (\n only) are not indented.
function indentString(string, spaces) {
  var ind = common$7.repeat(' ', spaces),
      position = 0,
      next = -1,
      result = '',
      line,
      length = string.length;

  while (position < length) {
    next = string.indexOf('\n', position);
    if (next === -1) {
      line = string.slice(position);
      position = length;
    } else {
      line = string.slice(position, next + 1);
      position = next + 1;
    }

    if (line.length && line !== '\n') { result += ind; }

    result += line;
  }

  return result;
}

function generateNextLine(state, level) {
  return '\n' + common$7.repeat(' ', state.indent * level);
}

function testImplicitResolving(state, str) {
  var index, length, type;

  for (index = 0, length = state.implicitTypes.length; index < length; index += 1) {
    type = state.implicitTypes[index];

    if (type.resolve(str)) {
      return true;
    }
  }

  return false;
}

// [33] s-white ::= s-space | s-tab
function isWhitespace(c) {
  return c === CHAR_SPACE || c === CHAR_TAB;
}

// Returns true if the character can be printed without escaping.
// From YAML 1.2: "any allowed characters known to be non-printable
// should also be escaped. [However,] This isn’t mandatory"
// Derived from nb-char - \t - #x85 - #xA0 - #x2028 - #x2029.
function isPrintable(c) {
  return  (0x00020 <= c && c <= 0x00007E)
      || ((0x000A1 <= c && c <= 0x00D7FF) && c !== 0x2028 && c !== 0x2029)
      || ((0x0E000 <= c && c <= 0x00FFFD) && c !== 0xFEFF /* BOM */)
      ||  (0x10000 <= c && c <= 0x10FFFF);
}

// Simplified test for values allowed after the first character in plain style.
function isPlainSafe(c) {
  // Uses a subset of nb-char - c-flow-indicator - ":" - "#"
  // where nb-char ::= c-printable - b-char - c-byte-order-mark.
  return isPrintable(c) && c !== 0xFEFF
    // - c-flow-indicator
    && c !== CHAR_COMMA
    && c !== CHAR_LEFT_SQUARE_BRACKET
    && c !== CHAR_RIGHT_SQUARE_BRACKET
    && c !== CHAR_LEFT_CURLY_BRACKET
    && c !== CHAR_RIGHT_CURLY_BRACKET
    // - ":" - "#"
    && c !== CHAR_COLON
    && c !== CHAR_SHARP;
}

// Simplified test for values allowed as the first character in plain style.
function isPlainSafeFirst(c) {
  // Uses a subset of ns-char - c-indicator
  // where ns-char = nb-char - s-white.
  return isPrintable(c) && c !== 0xFEFF
    && !isWhitespace(c) // - s-white
    // - (c-indicator ::=
    // “-” | “?” | “:” | “,” | “[” | “]” | “{” | “}”
    && c !== CHAR_MINUS
    && c !== CHAR_QUESTION
    && c !== CHAR_COLON
    && c !== CHAR_COMMA
    && c !== CHAR_LEFT_SQUARE_BRACKET
    && c !== CHAR_RIGHT_SQUARE_BRACKET
    && c !== CHAR_LEFT_CURLY_BRACKET
    && c !== CHAR_RIGHT_CURLY_BRACKET
    // | “#” | “&” | “*” | “!” | “|” | “>” | “'” | “"”
    && c !== CHAR_SHARP
    && c !== CHAR_AMPERSAND
    && c !== CHAR_ASTERISK
    && c !== CHAR_EXCLAMATION
    && c !== CHAR_VERTICAL_LINE
    && c !== CHAR_GREATER_THAN
    && c !== CHAR_SINGLE_QUOTE
    && c !== CHAR_DOUBLE_QUOTE
    // | “%” | “@” | “`”)
    && c !== CHAR_PERCENT
    && c !== CHAR_COMMERCIAL_AT
    && c !== CHAR_GRAVE_ACCENT;
}

var STYLE_PLAIN   = 1;
var STYLE_SINGLE  = 2;
var STYLE_LITERAL = 3;
var STYLE_FOLDED  = 4;
var STYLE_DOUBLE  = 5;

// Determines which scalar styles are possible and returns the preferred style.
// lineWidth = -1 => no limit.
// Pre-conditions: str.length > 0.
// Post-conditions:
//    STYLE_PLAIN or STYLE_SINGLE => no \n are in the string.
//    STYLE_LITERAL => no lines are suitable for folding (or lineWidth is -1).
//    STYLE_FOLDED => a line > lineWidth and can be folded (and lineWidth != -1).
function chooseScalarStyle(string, singleLineOnly, indentPerLevel, lineWidth, testAmbiguousType) {
  var i;
  var char;
  var hasLineBreak = false;
  var hasFoldableLine = false; // only checked if shouldTrackWidth
  var shouldTrackWidth = lineWidth !== -1;
  var previousLineBreak = -1; // count the first line correctly
  var plain = isPlainSafeFirst(string.charCodeAt(0))
          && !isWhitespace(string.charCodeAt(string.length - 1));

  if (singleLineOnly) {
    // Case: no block styles.
    // Check for disallowed characters to rule out plain and single.
    for (i = 0; i < string.length; i++) {
      char = string.charCodeAt(i);
      if (!isPrintable(char)) {
        return STYLE_DOUBLE;
      }
      plain = plain && isPlainSafe(char);
    }
  } else {
    // Case: block styles permitted.
    for (i = 0; i < string.length; i++) {
      char = string.charCodeAt(i);
      if (char === CHAR_LINE_FEED) {
        hasLineBreak = true;
        // Check if any line can be folded.
        if (shouldTrackWidth) {
          hasFoldableLine = hasFoldableLine ||
            // Foldable line = too long, and not more-indented.
            (i - previousLineBreak - 1 > lineWidth &&
             string[previousLineBreak + 1] !== ' ');
          previousLineBreak = i;
        }
      } else if (!isPrintable(char)) {
        return STYLE_DOUBLE;
      }
      plain = plain && isPlainSafe(char);
    }
    // in case the end is missing a \n
    hasFoldableLine = hasFoldableLine || (shouldTrackWidth &&
      (i - previousLineBreak - 1 > lineWidth &&
       string[previousLineBreak + 1] !== ' '));
  }
  // Although every style can represent \n without escaping, prefer block styles
  // for multiline, since they're more readable and they don't add empty lines.
  // Also prefer folding a super-long line.
  if (!hasLineBreak && !hasFoldableLine) {
    // Strings interpretable as another type have to be quoted;
    // e.g. the string 'true' vs. the boolean true.
    return plain && !testAmbiguousType(string)
      ? STYLE_PLAIN : STYLE_SINGLE;
  }
  // Edge case: block indentation indicator can only have one digit.
  if (string[0] === ' ' && indentPerLevel > 9) {
    return STYLE_DOUBLE;
  }
  // At this point we know block styles are valid.
  // Prefer literal style unless we want to fold.
  return hasFoldableLine ? STYLE_FOLDED : STYLE_LITERAL;
}

// Note: line breaking/folding is implemented for only the folded style.
// NB. We drop the last trailing newline (if any) of a returned block scalar
//  since the dumper adds its own newline. This always works:
//    • No ending newline => unaffected; already using strip "-" chomping.
//    • Ending newline    => removed then restored.
//  Importantly, this keeps the "+" chomp indicator from gaining an extra line.
function writeScalar(state, string, level, iskey) {
  state.dump = (function () {
    if (string.length === 0) {
      return "''";
    }
    if (!state.noCompatMode &&
        DEPRECATED_BOOLEANS_SYNTAX.indexOf(string) !== -1) {
      return "'" + string + "'";
    }

    var indent = state.indent * Math.max(1, level); // no 0-indent scalars
    // As indentation gets deeper, let the width decrease monotonically
    // to the lower bound min(state.lineWidth, 40).
    // Note that this implies
    //  state.lineWidth ≤ 40 + state.indent: width is fixed at the lower bound.
    //  state.lineWidth > 40 + state.indent: width decreases until the lower bound.
    // This behaves better than a constant minimum width which disallows narrower options,
    // or an indent threshold which causes the width to suddenly increase.
    var lineWidth = state.lineWidth === -1
      ? -1 : Math.max(Math.min(state.lineWidth, 40), state.lineWidth - indent);

    // Without knowing if keys are implicit/explicit, assume implicit for safety.
    var singleLineOnly = iskey
      // No block styles in flow mode.
      || (state.flowLevel > -1 && level >= state.flowLevel);
    function testAmbiguity(string) {
      return testImplicitResolving(state, string);
    }

    switch (chooseScalarStyle(string, singleLineOnly, state.indent, lineWidth, testAmbiguity)) {
      case STYLE_PLAIN:
        return string;
      case STYLE_SINGLE:
        return "'" + string.replace(/'/g, "''") + "'";
      case STYLE_LITERAL:
        return '|' + blockHeader(string, state.indent)
          + dropEndingNewline(indentString(string, indent));
      case STYLE_FOLDED:
        return '>' + blockHeader(string, state.indent)
          + dropEndingNewline(indentString(foldString(string, lineWidth), indent));
      case STYLE_DOUBLE:
        return '"' + escapeString(string, lineWidth) + '"';
      default:
        throw new YAMLException$5('impossible error: invalid scalar style');
    }
  }());
}

// Pre-conditions: string is valid for a block scalar, 1 <= indentPerLevel <= 9.
function blockHeader(string, indentPerLevel) {
  var indentIndicator = (string[0] === ' ') ? String(indentPerLevel) : '';

  // note the special case: the string '\n' counts as a "trailing" empty line.
  var clip =          string[string.length - 1] === '\n';
  var keep = clip && (string[string.length - 2] === '\n' || string === '\n');
  var chomp = keep ? '+' : (clip ? '' : '-');

  return indentIndicator + chomp + '\n';
}

// (See the note for writeScalar.)
function dropEndingNewline(string) {
  return string[string.length - 1] === '\n' ? string.slice(0, -1) : string;
}

// Note: a long line without a suitable break point will exceed the width limit.
// Pre-conditions: every char in str isPrintable, str.length > 0, width > 0.
function foldString(string, width) {
  // In folded style, $k$ consecutive newlines output as $k+1$ newlines—
  // unless they're before or after a more-indented line, or at the very
  // beginning or end, in which case $k$ maps to $k$.
  // Therefore, parse each chunk as newline(s) followed by a content line.
  var lineRe = /(\n+)([^\n]*)/g;

  // first line (possibly an empty line)
  var result = (function () {
    var nextLF = string.indexOf('\n');
    nextLF = nextLF !== -1 ? nextLF : string.length;
    lineRe.lastIndex = nextLF;
    return foldLine(string.slice(0, nextLF), width);
  }());
  // If we haven't reached the first content line yet, don't add an extra \n.
  var prevMoreIndented = string[0] === '\n' || string[0] === ' ';
  var moreIndented;

  // rest of the lines
  var match;
  while ((match = lineRe.exec(string))) {
    var prefix = match[1], line = match[2];
    moreIndented = (line[0] === ' ');
    result += prefix
      + (!prevMoreIndented && !moreIndented && line !== ''
        ? '\n' : '')
      + foldLine(line, width);
    prevMoreIndented = moreIndented;
  }

  return result;
}

// Greedy line breaking.
// Picks the longest line under the limit each time,
// otherwise settles for the shortest line over the limit.
// NB. More-indented lines *cannot* be folded, as that would add an extra \n.
function foldLine(line, width) {
  if (line === '' || line[0] === ' ') { return line; }

  // Since a more-indented line adds a \n, breaks can't be followed by a space.
  var breakRe = / [^ ]/g; // note: the match index will always be <= length-2.
  var match;
  // start is an inclusive index. end, curr, and next are exclusive.
  var start = 0, end, curr = 0, next = 0;
  var result = '';

  // Invariants: 0 <= start <= length-1.
  //   0 <= curr <= next <= max(0, length-2). curr - start <= width.
  // Inside the loop:
  //   A match implies length >= 2, so curr and next are <= length-2.
  while ((match = breakRe.exec(line))) {
    next = match.index;
    // maintain invariant: curr - start <= width
    if (next - start > width) {
      end = (curr > start) ? curr : next; // derive end <= length-2
      result += '\n' + line.slice(start, end);
      // skip the space that was output as \n
      start = end + 1;                    // derive start <= length-1
    }
    curr = next;
  }

  // By the invariants, start <= length-1, so there is something left over.
  // It is either the whole string or a part starting from non-whitespace.
  result += '\n';
  // Insert a break if the remainder is too long and there is a break available.
  if (line.length - start > width && curr > start) {
    result += line.slice(start, curr) + '\n' + line.slice(curr + 1);
  } else {
    result += line.slice(start);
  }

  return result.slice(1); // drop extra \n joiner
}

// Escapes a double-quoted string.
function escapeString(string) {
  var result = '';
  var char;
  var escapeSeq;

  for (var i = 0; i < string.length; i++) {
    char = string.charCodeAt(i);
    escapeSeq = ESCAPE_SEQUENCES[char];
    result += !escapeSeq && isPrintable(char)
      ? string[i]
      : escapeSeq || encodeHex(char);
  }

  return result;
}

function writeFlowSequence(state, level, object) {
  var _result = '',
      _tag    = state.tag,
      index,
      length;

  for (index = 0, length = object.length; index < length; index += 1) {
    // Write only valid elements.
    if (writeNode(state, level, object[index], false, false)) {
      if (index !== 0) { _result += ', '; }
      _result += state.dump;
    }
  }

  state.tag = _tag;
  state.dump = '[' + _result + ']';
}

function writeBlockSequence(state, level, object, compact) {
  var _result = '',
      _tag    = state.tag,
      index,
      length;

  for (index = 0, length = object.length; index < length; index += 1) {
    // Write only valid elements.
    if (writeNode(state, level + 1, object[index], true, true)) {
      if (!compact || index !== 0) {
        _result += generateNextLine(state, level);
      }
      _result += '- ' + state.dump;
    }
  }

  state.tag = _tag;
  state.dump = _result || '[]'; // Empty sequence if no valid values.
}

function writeFlowMapping(state, level, object) {
  var _result       = '',
      _tag          = state.tag,
      objectKeyList = Object.keys(object),
      index,
      length,
      objectKey,
      objectValue,
      pairBuffer;

  for (index = 0, length = objectKeyList.length; index < length; index += 1) {
    pairBuffer = '';

    if (index !== 0) { pairBuffer += ', '; }

    objectKey = objectKeyList[index];
    objectValue = object[objectKey];

    if (!writeNode(state, level, objectKey, false, false)) {
      continue; // Skip this pair because of invalid key;
    }

    if (state.dump.length > 1024) { pairBuffer += '? '; }

    pairBuffer += state.dump + ': ';

    if (!writeNode(state, level, objectValue, false, false)) {
      continue; // Skip this pair because of invalid value.
    }

    pairBuffer += state.dump;

    // Both key and value are valid.
    _result += pairBuffer;
  }

  state.tag = _tag;
  state.dump = '{' + _result + '}';
}

function writeBlockMapping(state, level, object, compact) {
  var _result       = '',
      _tag          = state.tag,
      objectKeyList = Object.keys(object),
      index,
      length,
      objectKey,
      objectValue,
      explicitPair,
      pairBuffer;

  // Allow sorting keys so that the output file is deterministic
  if (state.sortKeys === true) {
    // Default sorting
    objectKeyList.sort();
  } else if (typeof state.sortKeys === 'function') {
    // Custom sort function
    objectKeyList.sort(state.sortKeys);
  } else if (state.sortKeys) {
    // Something is wrong
    throw new YAMLException$5('sortKeys must be a boolean or a function');
  }

  for (index = 0, length = objectKeyList.length; index < length; index += 1) {
    pairBuffer = '';

    if (!compact || index !== 0) {
      pairBuffer += generateNextLine(state, level);
    }

    objectKey = objectKeyList[index];
    objectValue = object[objectKey];

    if (!writeNode(state, level + 1, objectKey, true, true, true)) {
      continue; // Skip this pair because of invalid key.
    }

    explicitPair = (state.tag !== null && state.tag !== '?') ||
                   (state.dump && state.dump.length > 1024);

    if (explicitPair) {
      if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
        pairBuffer += '?';
      } else {
        pairBuffer += '? ';
      }
    }

    pairBuffer += state.dump;

    if (explicitPair) {
      pairBuffer += generateNextLine(state, level);
    }

    if (!writeNode(state, level + 1, objectValue, true, explicitPair)) {
      continue; // Skip this pair because of invalid value.
    }

    if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
      pairBuffer += ':';
    } else {
      pairBuffer += ': ';
    }

    pairBuffer += state.dump;

    // Both key and value are valid.
    _result += pairBuffer;
  }

  state.tag = _tag;
  state.dump = _result || '{}'; // Empty mapping if no valid pairs.
}

function detectType(state, object, explicit) {
  var _result, typeList, index, length, type, style;

  typeList = explicit ? state.explicitTypes : state.implicitTypes;

  for (index = 0, length = typeList.length; index < length; index += 1) {
    type = typeList[index];

    if ((type.instanceOf  || type.predicate) &&
        (!type.instanceOf || ((typeof object === 'object') && (object instanceof type.instanceOf))) &&
        (!type.predicate  || type.predicate(object))) {

      state.tag = explicit ? type.tag : '?';

      if (type.represent) {
        style = state.styleMap[type.tag] || type.defaultStyle;

        if (_toString$2.call(type.represent) === '[object Function]') {
          _result = type.represent(object, style);
        } else if (_hasOwnProperty$3.call(type.represent, style)) {
          _result = type.represent[style](object, style);
        } else {
          throw new YAMLException$5('!<' + type.tag + '> tag resolver accepts not "' + style + '" style');
        }

        state.dump = _result;
      }

      return true;
    }
  }

  return false;
}

// Serializes `object` and writes it to global `result`.
// Returns true on success, or false on invalid object.
//
function writeNode(state, level, object, block, compact, iskey) {
  state.tag = null;
  state.dump = object;

  if (!detectType(state, object, false)) {
    detectType(state, object, true);
  }

  var type = _toString$2.call(state.dump);

  if (block) {
    block = (state.flowLevel < 0 || state.flowLevel > level);
  }

  var objectOrArray = type === '[object Object]' || type === '[object Array]',
      duplicateIndex,
      duplicate;

  if (objectOrArray) {
    duplicateIndex = state.duplicates.indexOf(object);
    duplicate = duplicateIndex !== -1;
  }

  if ((state.tag !== null && state.tag !== '?') || duplicate || (state.indent !== 2 && level > 0)) {
    compact = false;
  }

  if (duplicate && state.usedDuplicates[duplicateIndex]) {
    state.dump = '*ref_' + duplicateIndex;
  } else {
    if (objectOrArray && duplicate && !state.usedDuplicates[duplicateIndex]) {
      state.usedDuplicates[duplicateIndex] = true;
    }
    if (type === '[object Object]') {
      if (block && (Object.keys(state.dump).length !== 0)) {
        writeBlockMapping(state, level, state.dump, compact);
        if (duplicate) {
          state.dump = '&ref_' + duplicateIndex + state.dump;
        }
      } else {
        writeFlowMapping(state, level, state.dump);
        if (duplicate) {
          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump;
        }
      }
    } else if (type === '[object Array]') {
      if (block && (state.dump.length !== 0)) {
        writeBlockSequence(state, level, state.dump, compact);
        if (duplicate) {
          state.dump = '&ref_' + duplicateIndex + state.dump;
        }
      } else {
        writeFlowSequence(state, level, state.dump);
        if (duplicate) {
          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump;
        }
      }
    } else if (type === '[object String]') {
      if (state.tag !== '?') {
        writeScalar(state, state.dump, level, iskey);
      }
    } else {
      if (state.skipInvalid) { return false; }
      throw new YAMLException$5('unacceptable kind of an object to dump ' + type);
    }

    if (state.tag !== null && state.tag !== '?') {
      state.dump = '!<' + state.tag + '> ' + state.dump;
    }
  }

  return true;
}

function getDuplicateReferences(object, state) {
  var objects = [],
      duplicatesIndexes = [],
      index,
      length;

  inspectNode(object, objects, duplicatesIndexes);

  for (index = 0, length = duplicatesIndexes.length; index < length; index += 1) {
    state.duplicates.push(objects[duplicatesIndexes[index]]);
  }
  state.usedDuplicates = new Array(length);
}

function inspectNode(object, objects, duplicatesIndexes) {
  var objectKeyList,
      index,
      length;

  if (object !== null && typeof object === 'object') {
    index = objects.indexOf(object);
    if (index !== -1) {
      if (duplicatesIndexes.indexOf(index) === -1) {
        duplicatesIndexes.push(index);
      }
    } else {
      objects.push(object);

      if (Array.isArray(object)) {
        for (index = 0, length = object.length; index < length; index += 1) {
          inspectNode(object[index], objects, duplicatesIndexes);
        }
      } else {
        objectKeyList = Object.keys(object);

        for (index = 0, length = objectKeyList.length; index < length; index += 1) {
          inspectNode(object[objectKeyList[index]], objects, duplicatesIndexes);
        }
      }
    }
  }
}

function dump$1(input, options) {
  options = options || {};

  var state = new State$1(options);

  if (!state.noRefs) { getDuplicateReferences(input, state); }

  if (writeNode(state, 0, input, true, true)) { return state.dump + '\n'; }

  return '';
}

function safeDump$1(input, options) {
  return dump$1(input, common$7.extend({ schema: DEFAULT_SAFE_SCHEMA$2 }, options));
}

var dump_1 = dump$1;
var safeDump_1 = safeDump$1;

var dumper$1 = {
	dump: dump_1,
	safeDump: safeDump_1
};

var loader = loader$1;
var dumper = dumper$1;


function deprecated(name) {
  return function () {
    throw new Error('Function ' + name + ' is deprecated and cannot be used.');
  };
}


var Type = type;
var Schema = schema;
var FAILSAFE_SCHEMA = failsafe;
var JSON_SCHEMA = json;
var CORE_SCHEMA = core;
var DEFAULT_SAFE_SCHEMA = default_safe;
var DEFAULT_FULL_SCHEMA = default_full;
var load = loader.load;
var loadAll = loader.loadAll;
var safeLoad = loader.safeLoad;
var safeLoadAll = loader.safeLoadAll;
var dump = dumper.dump;
var safeDump = dumper.safeDump;
var YAMLException = exception;

// Deprecated schema names from JS-YAML 2.0.x
var MINIMAL_SCHEMA = failsafe;
var SAFE_SCHEMA = default_safe;
var DEFAULT_SCHEMA = default_full;

// Deprecated functions from JS-YAML 1.x.x
var scan$1 = deprecated('scan');
var parse$1 = deprecated('parse');
var compose = deprecated('compose');
var addConstructor = deprecated('addConstructor');

var jsYaml = {
	Type: Type,
	Schema: Schema,
	FAILSAFE_SCHEMA: FAILSAFE_SCHEMA,
	JSON_SCHEMA: JSON_SCHEMA,
	CORE_SCHEMA: CORE_SCHEMA,
	DEFAULT_SAFE_SCHEMA: DEFAULT_SAFE_SCHEMA,
	DEFAULT_FULL_SCHEMA: DEFAULT_FULL_SCHEMA,
	load: load,
	loadAll: loadAll,
	safeLoad: safeLoad,
	safeLoadAll: safeLoadAll,
	dump: dump,
	safeDump: safeDump,
	YAMLException: YAMLException,
	MINIMAL_SCHEMA: MINIMAL_SCHEMA,
	SAFE_SCHEMA: SAFE_SCHEMA,
	DEFAULT_SCHEMA: DEFAULT_SCHEMA,
	scan: scan$1,
	parse: parse$1,
	compose: compose,
	addConstructor: addConstructor
};

var yaml = jsYaml;


var index = yaml;

var frontMatter = function(dom, data) {
  var localData = {};
  var el = dom.querySelector('script[type="text/front-matter"]');
  if (el) {
    var text = el.textContent;
    localData = index.safeLoad(text);
  }

  data.title = localData.title ? localData.title : "Untitled";
  data.description = localData.description ? localData.description : "No description.";

  data.authors = localData.authors ? localData.authors : [];

  data.authors = data.authors.map(function (author, i) {
    var a = {};
    var name = Object.keys(author)[0];
    if ((typeof author) === "string") {
      name = author;
    } else {
      a.personalURL = author[name];
    }
    var names = name.split(" ");
    a.name = name;
    a.firstName = names.slice(0, names.length - 1).join(" ");
    a.lastName = names[names.length -1];
    if(localData.affiliations[i]) {
      var affiliation = Object.keys(localData.affiliations[i])[0];
      if ((typeof localData.affiliations[i]) === "string") {
        affiliation = localData.affiliations[i];
      } else {
        a.affiliationURL = localData.affiliations[i][affiliation];
      }
      a.affiliation = affiliation;
    }
    return a;
  });
  

};

var bibtexParse = createCommonjsModule(function (module, exports) {
/* start bibtexParse 0.0.22 */

//Original work by Henrik Muehe (c) 2010
//
//CommonJS port by Mikola Lysenko 2013
//
//Port to Browser lib by ORCID / RCPETERS
//
//Issues:
//no comment handling within strings
//no string concatenation
//no variable values yet
//Grammar implemented here:
//bibtex -> (string | preamble | comment | entry)*;
//string -> '@STRING' '{' key_equals_value '}';
//preamble -> '@PREAMBLE' '{' value '}';
//comment -> '@COMMENT' '{' value '}';
//entry -> '@' key '{' key ',' key_value_list '}';
//key_value_list -> key_equals_value (',' key_equals_value)*;
//key_equals_value -> key '=' value;
//value -> value_quotes | value_braces | key;
//value_quotes -> '"' .*? '"'; // not quite
//value_braces -> '{' .*? '"'; // not quite
(function(exports) {

    function BibtexParser() {
        
        this.months = ["jan", "feb", "mar", "apr", "may", "jun", "jul", "aug", "sep", "oct", "nov", "dec"];
        this.notKey = [',','{','}',' ','='];
        this.pos = 0;
        this.input = "";
        this.entries = new Array();

        this.currentEntry = "";

        this.setInput = function(t) {
            this.input = t;
        };

        this.getEntries = function() {
            return this.entries;
        };

        this.isWhitespace = function(s) {
            return (s == ' ' || s == '\r' || s == '\t' || s == '\n');
        };

        this.match = function(s, canCommentOut) {
            if (canCommentOut == undefined || canCommentOut == null)
                { canCommentOut = true; }
            this.skipWhitespace(canCommentOut);
            if (this.input.substring(this.pos, this.pos + s.length) == s) {
                this.pos += s.length;
            } else {
                throw "Token mismatch, expected " + s + ", found "
                        + this.input.substring(this.pos);
            }
            this.skipWhitespace(canCommentOut);
        };

        this.tryMatch = function(s, canCommentOut) {
            if (canCommentOut == undefined || canCommentOut == null)
                { canCommentOut = true; }
            this.skipWhitespace(canCommentOut);
            if (this.input.substring(this.pos, this.pos + s.length) == s) {
                return true;
            } else {
                return false;
            }
            this.skipWhitespace(canCommentOut);
        };

        /* when search for a match all text can be ignored, not just white space */
        this.matchAt = function() {
            var this$1 = this;

            while (this.input.length > this.pos && this.input[this.pos] != '@') {
                this$1.pos++;
            }

            if (this.input[this.pos] == '@') {
                return true;
            }
            return false;
        };

        this.skipWhitespace = function(canCommentOut) {
            var this$1 = this;

            while (this.isWhitespace(this.input[this.pos])) {
                this$1.pos++;
            }
            if (this.input[this.pos] == "%" && canCommentOut == true) {
                while (this.input[this.pos] != "\n") {
                    this$1.pos++;
                }
                this.skipWhitespace(canCommentOut);
            }
        };

        this.value_braces = function() {
            var this$1 = this;

            var bracecount = 0;
            this.match("{", false);
            var start = this.pos;
            var escaped = false;
            while (true) {
                if (!escaped) {
                    if (this$1.input[this$1.pos] == '}') {
                        if (bracecount > 0) {
                            bracecount--;
                        } else {
                            var end = this$1.pos;
                            this$1.match("}", false);
                            return this$1.input.substring(start, end);
                        }
                    } else if (this$1.input[this$1.pos] == '{') {
                        bracecount++;
                    } else if (this$1.pos >= this$1.input.length - 1) {
                        throw "Unterminated value";
                    }
                }
                if (this$1.input[this$1.pos] == '\\' && escaped == false)
                    { escaped = true; }
                else
                    { escaped = false; }
                this$1.pos++;
            }
        };

        this.value_comment = function() {
            var this$1 = this;

            var str = '';
            var brcktCnt = 0;
            while (!(this.tryMatch("}", false) && brcktCnt == 0)) {
                str = str + this$1.input[this$1.pos];
                if (this$1.input[this$1.pos] == '{')
                    { brcktCnt++; }
                if (this$1.input[this$1.pos] == '}')
                    { brcktCnt--; }
                if (this$1.pos >= this$1.input.length - 1) {
                    throw "Unterminated value:" + this$1.input.substring(start);
                }
                this$1.pos++;
            }
            return str;
        };

        this.value_quotes = function() {
            var this$1 = this;

            this.match('"', false);
            var start = this.pos;
            var escaped = false;
            while (true) {
                if (!escaped) {
                    if (this$1.input[this$1.pos] == '"') {
                        var end = this$1.pos;
                        this$1.match('"', false);
                        return this$1.input.substring(start, end);
                    } else if (this$1.pos >= this$1.input.length - 1) {
                        throw "Unterminated value:" + this$1.input.substring(start);
                    }
                }
                if (this$1.input[this$1.pos] == '\\' && escaped == false)
                    { escaped = true; }
                else
                    { escaped = false; }
                this$1.pos++;
            }
        };

        this.single_value = function() {
            var start = this.pos;
            if (this.tryMatch("{")) {
                return this.value_braces();
            } else if (this.tryMatch('"')) {
                return this.value_quotes();
            } else {
                var k = this.key();
                if (k.match("^[0-9]+$"))
                    { return k; }
                else if (this.months.indexOf(k.toLowerCase()) >= 0)
                    { return k.toLowerCase(); }
                else
                    { throw "Value expected:" + this.input.substring(start) + ' for key: ' + k; }
            
            }
        };

        this.value = function() {
            var this$1 = this;

            var values = [];
            values.push(this.single_value());
            while (this.tryMatch("#")) {
                this$1.match("#");
                values.push(this$1.single_value());
            }
            return values.join("");
        };

        this.key = function() {
            var this$1 = this;

            var start = this.pos;
            while (true) {
                if (this$1.pos >= this$1.input.length) {
                    throw "Runaway key";
                }
                                // а-яА-Я is Cyrillic
                //console.log(this.input[this.pos]);
                if (this$1.notKey.indexOf(this$1.input[this$1.pos]) >= 0) {
                    return this$1.input.substring(start, this$1.pos);
                } else {
                    this$1.pos++;
                    
                }
            }
        };

        this.key_equals_value = function() {
            var key = this.key();
            if (this.tryMatch("=")) {
                this.match("=");
                var val = this.value();
                return [ key, val ];
            } else {
                throw "... = value expected, equals sign missing:"
                        + this.input.substring(this.pos);
            }
        };

        this.key_value_list = function() {
            var this$1 = this;

            var kv = this.key_equals_value();
            this.currentEntry['entryTags'] = {};
            this.currentEntry['entryTags'][kv[0]] = kv[1];
            while (this.tryMatch(",")) {
                this$1.match(",");
                // fixes problems with commas at the end of a list
                if (this$1.tryMatch("}")) {
                    break;
                }
                
                kv = this$1.key_equals_value();
                this$1.currentEntry['entryTags'][kv[0]] = kv[1];
            }
        };

        this.entry_body = function(d) {
            this.currentEntry = {};
            this.currentEntry['citationKey'] = this.key();
            this.currentEntry['entryType'] = d.substring(1);
            this.match(",");
            this.key_value_list();
            this.entries.push(this.currentEntry);
        };

        this.directive = function() {
            this.match("@");
            return "@" + this.key();
        };

        this.preamble = function() {
            this.currentEntry = {};
            this.currentEntry['entryType'] = 'PREAMBLE';
            this.currentEntry['entry'] = this.value_comment();
            this.entries.push(this.currentEntry);
        };

        this.comment = function() {
            this.currentEntry = {};
            this.currentEntry['entryType'] = 'COMMENT';
            this.currentEntry['entry'] = this.value_comment();
            this.entries.push(this.currentEntry);
        };

        this.entry = function(d) {
            this.entry_body(d);
        };

        this.bibtex = function() {
            var this$1 = this;

            while (this.matchAt()) {
                var d = this$1.directive();
                this$1.match("{");
                if (d == "@STRING") {
                    this$1.string();
                } else if (d == "@PREAMBLE") {
                    this$1.preamble();
                } else if (d == "@COMMENT") {
                    this$1.comment();
                } else {
                    this$1.entry(d);
                }
                this$1.match("}");
            }
        };
    }
    
    exports.toJSON = function(bibtex) {
        var b = new BibtexParser();
        b.setInput(bibtex);
        b.bibtex();
        return b.entries;
    };

    /* added during hackathon don't hate on me */
    exports.toBibtex = function(json) {
        var out = '';
        for ( var i in json) {
            out += "@" + json[i].entryType;
            out += '{';
            if (json[i].citationKey)
                { out += json[i].citationKey + ', '; }
            if (json[i].entry)
                { out += json[i].entry ; }
            if (json[i].entryTags) {
                var tags = '';
                for (var jdx in json[i].entryTags) {
                    if (tags.length != 0)
                        { tags += ', '; }
                    tags += jdx + '= {' + json[i].entryTags[jdx] + '}';
                }
                out += tags;
            }
            out += '}\n\n';
        }
        return out;
        
    };

})(exports);

/* end bibtexParse */
});

var bibliography = function(dom, data) {
  var el = dom.querySelector('script[type="text/bibliography"]');
  var citations = [];
  var bibliography = {};
  //TODO If we don't have a local element, make a request for the document.
  if (el) {
    var rawBib = el.textContent;
    var parsed = bibtexParse.toJSON(rawBib);
    if(parsed) {
      parsed.forEach(function (e) {
        for (var k in e.entryTags){
          var val = e.entryTags[k];
          val = val.replace(/[\t\n ]+/g, " ");
          val = val.replace(/{\\["^`\.'acu~Hvs]( )?([a-zA-Z])}/g,
                            function (full, x, char) { return char; });
          val = val.replace(/{\\([a-zA-Z])}/g,
                            function (full, char) { return char; });
          e.entryTags[k] = val;
        }
        bibliography[e.citationKey] = e.entryTags;
        bibliography[e.citationKey].type = e.entryType;
      });
    }


    var citeTags = [].slice.apply(dom.querySelectorAll("dt-cite"));
    citeTags.forEach(function (el) {
      var key = el.getAttribute("key");
      if (key) {
        var citationKeys = key.split(",");
        citationKeys.forEach(function (key) {
          if (citations.indexOf(key) == -1){
            citations.push(key);
            if (!(key in bibliography)){
              console.warn("No bibliography entry found for: " + key);
            }
          }
        });
      }
    });
  }
  data.bibliography = bibliography;
  data.citations = citations;
};

var t0 = new Date;
var t1 = new Date;

function newInterval(floori, offseti, count, field) {

  function interval(date) {
    return floori(date = new Date(+date)), date;
  }

  interval.floor = interval;

  interval.ceil = function(date) {
    return floori(date = new Date(date - 1)), offseti(date, 1), floori(date), date;
  };

  interval.round = function(date) {
    var d0 = interval(date),
        d1 = interval.ceil(date);
    return date - d0 < d1 - date ? d0 : d1;
  };

  interval.offset = function(date, step) {
    return offseti(date = new Date(+date), step == null ? 1 : Math.floor(step)), date;
  };

  interval.range = function(start, stop, step) {
    var range = [];
    start = interval.ceil(start);
    step = step == null ? 1 : Math.floor(step);
    if (!(start < stop) || !(step > 0)) { return range; } // also handles Invalid Date
    do { range.push(new Date(+start)); } while (offseti(start, step), floori(start), start < stop)
    return range;
  };

  interval.filter = function(test) {
    return newInterval(function(date) {
      if (date >= date) { while (floori(date), !test(date)) { date.setTime(date - 1); } }
    }, function(date, step) {
      if (date >= date) { while (--step >= 0) { while (offseti(date, 1), !test(date)) {} } } // eslint-disable-line no-empty
    });
  };

  if (count) {
    interval.count = function(start, end) {
      t0.setTime(+start), t1.setTime(+end);
      floori(t0), floori(t1);
      return Math.floor(count(t0, t1));
    };

    interval.every = function(step) {
      step = Math.floor(step);
      return !isFinite(step) || !(step > 0) ? null
          : !(step > 1) ? interval
          : interval.filter(field
              ? function(d) { return field(d) % step === 0; }
              : function(d) { return interval.count(0, d) % step === 0; });
    };
  }

  return interval;
}

var millisecond = newInterval(function() {
  // noop
}, function(date, step) {
  date.setTime(+date + step);
}, function(start, end) {
  return end - start;
});

// An optimized implementation for this simple case.
millisecond.every = function(k) {
  k = Math.floor(k);
  if (!isFinite(k) || !(k > 0)) { return null; }
  if (!(k > 1)) { return millisecond; }
  return newInterval(function(date) {
    date.setTime(Math.floor(date / k) * k);
  }, function(date, step) {
    date.setTime(+date + step * k);
  }, function(start, end) {
    return (end - start) / k;
  });
};

var durationSecond = 1e3;
var durationMinute = 6e4;
var durationHour = 36e5;
var durationDay = 864e5;
var durationWeek = 6048e5;

var second = newInterval(function(date) {
  date.setTime(Math.floor(date / durationSecond) * durationSecond);
}, function(date, step) {
  date.setTime(+date + step * durationSecond);
}, function(start, end) {
  return (end - start) / durationSecond;
}, function(date) {
  return date.getUTCSeconds();
});

var minute = newInterval(function(date) {
  date.setTime(Math.floor(date / durationMinute) * durationMinute);
}, function(date, step) {
  date.setTime(+date + step * durationMinute);
}, function(start, end) {
  return (end - start) / durationMinute;
}, function(date) {
  return date.getMinutes();
});

var hour = newInterval(function(date) {
  var offset = date.getTimezoneOffset() * durationMinute % durationHour;
  if (offset < 0) { offset += durationHour; }
  date.setTime(Math.floor((+date - offset) / durationHour) * durationHour + offset);
}, function(date, step) {
  date.setTime(+date + step * durationHour);
}, function(start, end) {
  return (end - start) / durationHour;
}, function(date) {
  return date.getHours();
});

var day = newInterval(function(date) {
  date.setHours(0, 0, 0, 0);
}, function(date, step) {
  date.setDate(date.getDate() + step);
}, function(start, end) {
  return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationDay;
}, function(date) {
  return date.getDate() - 1;
});

function weekday(i) {
  return newInterval(function(date) {
    date.setDate(date.getDate() - (date.getDay() + 7 - i) % 7);
    date.setHours(0, 0, 0, 0);
  }, function(date, step) {
    date.setDate(date.getDate() + step * 7);
  }, function(start, end) {
    return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationWeek;
  });
}

var sunday = weekday(0);
var monday = weekday(1);
var tuesday = weekday(2);
var wednesday = weekday(3);
var thursday = weekday(4);
var friday = weekday(5);
var saturday = weekday(6);

var month = newInterval(function(date) {
  date.setDate(1);
  date.setHours(0, 0, 0, 0);
}, function(date, step) {
  date.setMonth(date.getMonth() + step);
}, function(start, end) {
  return end.getMonth() - start.getMonth() + (end.getFullYear() - start.getFullYear()) * 12;
}, function(date) {
  return date.getMonth();
});

var year = newInterval(function(date) {
  date.setMonth(0, 1);
  date.setHours(0, 0, 0, 0);
}, function(date, step) {
  date.setFullYear(date.getFullYear() + step);
}, function(start, end) {
  return end.getFullYear() - start.getFullYear();
}, function(date) {
  return date.getFullYear();
});

// An optimized implementation for this simple case.
year.every = function(k) {
  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {
    date.setFullYear(Math.floor(date.getFullYear() / k) * k);
    date.setMonth(0, 1);
    date.setHours(0, 0, 0, 0);
  }, function(date, step) {
    date.setFullYear(date.getFullYear() + step * k);
  });
};

var utcMinute = newInterval(function(date) {
  date.setUTCSeconds(0, 0);
}, function(date, step) {
  date.setTime(+date + step * durationMinute);
}, function(start, end) {
  return (end - start) / durationMinute;
}, function(date) {
  return date.getUTCMinutes();
});

var utcHour = newInterval(function(date) {
  date.setUTCMinutes(0, 0, 0);
}, function(date, step) {
  date.setTime(+date + step * durationHour);
}, function(start, end) {
  return (end - start) / durationHour;
}, function(date) {
  return date.getUTCHours();
});

var utcDay = newInterval(function(date) {
  date.setUTCHours(0, 0, 0, 0);
}, function(date, step) {
  date.setUTCDate(date.getUTCDate() + step);
}, function(start, end) {
  return (end - start) / durationDay;
}, function(date) {
  return date.getUTCDate() - 1;
});

function utcWeekday(i) {
  return newInterval(function(date) {
    date.setUTCDate(date.getUTCDate() - (date.getUTCDay() + 7 - i) % 7);
    date.setUTCHours(0, 0, 0, 0);
  }, function(date, step) {
    date.setUTCDate(date.getUTCDate() + step * 7);
  }, function(start, end) {
    return (end - start) / durationWeek;
  });
}

var utcSunday = utcWeekday(0);
var utcMonday = utcWeekday(1);
var utcTuesday = utcWeekday(2);
var utcWednesday = utcWeekday(3);
var utcThursday = utcWeekday(4);
var utcFriday = utcWeekday(5);
var utcSaturday = utcWeekday(6);

var utcMonth = newInterval(function(date) {
  date.setUTCDate(1);
  date.setUTCHours(0, 0, 0, 0);
}, function(date, step) {
  date.setUTCMonth(date.getUTCMonth() + step);
}, function(start, end) {
  return end.getUTCMonth() - start.getUTCMonth() + (end.getUTCFullYear() - start.getUTCFullYear()) * 12;
}, function(date) {
  return date.getUTCMonth();
});

var utcYear = newInterval(function(date) {
  date.setUTCMonth(0, 1);
  date.setUTCHours(0, 0, 0, 0);
}, function(date, step) {
  date.setUTCFullYear(date.getUTCFullYear() + step);
}, function(start, end) {
  return end.getUTCFullYear() - start.getUTCFullYear();
}, function(date) {
  return date.getUTCFullYear();
});

// An optimized implementation for this simple case.
utcYear.every = function(k) {
  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {
    date.setUTCFullYear(Math.floor(date.getUTCFullYear() / k) * k);
    date.setUTCMonth(0, 1);
    date.setUTCHours(0, 0, 0, 0);
  }, function(date, step) {
    date.setUTCFullYear(date.getUTCFullYear() + step * k);
  });
};

function localDate(d) {
  if (0 <= d.y && d.y < 100) {
    var date = new Date(-1, d.m, d.d, d.H, d.M, d.S, d.L);
    date.setFullYear(d.y);
    return date;
  }
  return new Date(d.y, d.m, d.d, d.H, d.M, d.S, d.L);
}

function utcDate(d) {
  if (0 <= d.y && d.y < 100) {
    var date = new Date(Date.UTC(-1, d.m, d.d, d.H, d.M, d.S, d.L));
    date.setUTCFullYear(d.y);
    return date;
  }
  return new Date(Date.UTC(d.y, d.m, d.d, d.H, d.M, d.S, d.L));
}

function newYear(y) {
  return {y: y, m: 0, d: 1, H: 0, M: 0, S: 0, L: 0};
}

function formatLocale(locale) {
  var locale_dateTime = locale.dateTime,
      locale_date = locale.date,
      locale_time = locale.time,
      locale_periods = locale.periods,
      locale_weekdays = locale.days,
      locale_shortWeekdays = locale.shortDays,
      locale_months = locale.months,
      locale_shortMonths = locale.shortMonths;

  var periodRe = formatRe(locale_periods),
      periodLookup = formatLookup(locale_periods),
      weekdayRe = formatRe(locale_weekdays),
      weekdayLookup = formatLookup(locale_weekdays),
      shortWeekdayRe = formatRe(locale_shortWeekdays),
      shortWeekdayLookup = formatLookup(locale_shortWeekdays),
      monthRe = formatRe(locale_months),
      monthLookup = formatLookup(locale_months),
      shortMonthRe = formatRe(locale_shortMonths),
      shortMonthLookup = formatLookup(locale_shortMonths);

  var formats = {
    "a": formatShortWeekday,
    "A": formatWeekday,
    "b": formatShortMonth,
    "B": formatMonth,
    "c": null,
    "d": formatDayOfMonth,
    "e": formatDayOfMonth,
    "H": formatHour24,
    "I": formatHour12,
    "j": formatDayOfYear,
    "L": formatMilliseconds,
    "m": formatMonthNumber,
    "M": formatMinutes,
    "p": formatPeriod,
    "S": formatSeconds,
    "U": formatWeekNumberSunday,
    "w": formatWeekdayNumber,
    "W": formatWeekNumberMonday,
    "x": null,
    "X": null,
    "y": formatYear,
    "Y": formatFullYear,
    "Z": formatZone,
    "%": formatLiteralPercent
  };

  var utcFormats = {
    "a": formatUTCShortWeekday,
    "A": formatUTCWeekday,
    "b": formatUTCShortMonth,
    "B": formatUTCMonth,
    "c": null,
    "d": formatUTCDayOfMonth,
    "e": formatUTCDayOfMonth,
    "H": formatUTCHour24,
    "I": formatUTCHour12,
    "j": formatUTCDayOfYear,
    "L": formatUTCMilliseconds,
    "m": formatUTCMonthNumber,
    "M": formatUTCMinutes,
    "p": formatUTCPeriod,
    "S": formatUTCSeconds,
    "U": formatUTCWeekNumberSunday,
    "w": formatUTCWeekdayNumber,
    "W": formatUTCWeekNumberMonday,
    "x": null,
    "X": null,
    "y": formatUTCYear,
    "Y": formatUTCFullYear,
    "Z": formatUTCZone,
    "%": formatLiteralPercent
  };

  var parses = {
    "a": parseShortWeekday,
    "A": parseWeekday,
    "b": parseShortMonth,
    "B": parseMonth,
    "c": parseLocaleDateTime,
    "d": parseDayOfMonth,
    "e": parseDayOfMonth,
    "H": parseHour24,
    "I": parseHour24,
    "j": parseDayOfYear,
    "L": parseMilliseconds,
    "m": parseMonthNumber,
    "M": parseMinutes,
    "p": parsePeriod,
    "S": parseSeconds,
    "U": parseWeekNumberSunday,
    "w": parseWeekdayNumber,
    "W": parseWeekNumberMonday,
    "x": parseLocaleDate,
    "X": parseLocaleTime,
    "y": parseYear,
    "Y": parseFullYear,
    "Z": parseZone,
    "%": parseLiteralPercent
  };

  // These recursive directive definitions must be deferred.
  formats.x = newFormat(locale_date, formats);
  formats.X = newFormat(locale_time, formats);
  formats.c = newFormat(locale_dateTime, formats);
  utcFormats.x = newFormat(locale_date, utcFormats);
  utcFormats.X = newFormat(locale_time, utcFormats);
  utcFormats.c = newFormat(locale_dateTime, utcFormats);

  function newFormat(specifier, formats) {
    return function(date) {
      var string = [],
          i = -1,
          j = 0,
          n = specifier.length,
          c,
          pad,
          format;

      if (!(date instanceof Date)) { date = new Date(+date); }

      while (++i < n) {
        if (specifier.charCodeAt(i) === 37) {
          string.push(specifier.slice(j, i));
          if ((pad = pads[c = specifier.charAt(++i)]) != null) { c = specifier.charAt(++i); }
          else { pad = c === "e" ? " " : "0"; }
          if (format = formats[c]) { c = format(date, pad); }
          string.push(c);
          j = i + 1;
        }
      }

      string.push(specifier.slice(j, i));
      return string.join("");
    };
  }

  function newParse(specifier, newDate) {
    return function(string) {
      var d = newYear(1900),
          i = parseSpecifier(d, specifier, string += "", 0);
      if (i != string.length) { return null; }

      // The am-pm flag is 0 for AM, and 1 for PM.
      if ("p" in d) { d.H = d.H % 12 + d.p * 12; }

      // Convert day-of-week and week-of-year to day-of-year.
      if ("W" in d || "U" in d) {
        if (!("w" in d)) { d.w = "W" in d ? 1 : 0; }
        var day$$1 = "Z" in d ? utcDate(newYear(d.y)).getUTCDay() : newDate(newYear(d.y)).getDay();
        d.m = 0;
        d.d = "W" in d ? (d.w + 6) % 7 + d.W * 7 - (day$$1 + 5) % 7 : d.w + d.U * 7 - (day$$1 + 6) % 7;
      }

      // If a time zone is specified, all fields are interpreted as UTC and then
      // offset according to the specified time zone.
      if ("Z" in d) {
        d.H += d.Z / 100 | 0;
        d.M += d.Z % 100;
        return utcDate(d);
      }

      // Otherwise, all fields are in local time.
      return newDate(d);
    };
  }

  function parseSpecifier(d, specifier, string, j) {
    var i = 0,
        n = specifier.length,
        m = string.length,
        c,
        parse;

    while (i < n) {
      if (j >= m) { return -1; }
      c = specifier.charCodeAt(i++);
      if (c === 37) {
        c = specifier.charAt(i++);
        parse = parses[c in pads ? specifier.charAt(i++) : c];
        if (!parse || ((j = parse(d, string, j)) < 0)) { return -1; }
      } else if (c != string.charCodeAt(j++)) {
        return -1;
      }
    }

    return j;
  }

  function parsePeriod(d, string, i) {
    var n = periodRe.exec(string.slice(i));
    return n ? (d.p = periodLookup[n[0].toLowerCase()], i + n[0].length) : -1;
  }

  function parseShortWeekday(d, string, i) {
    var n = shortWeekdayRe.exec(string.slice(i));
    return n ? (d.w = shortWeekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;
  }

  function parseWeekday(d, string, i) {
    var n = weekdayRe.exec(string.slice(i));
    return n ? (d.w = weekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;
  }

  function parseShortMonth(d, string, i) {
    var n = shortMonthRe.exec(string.slice(i));
    return n ? (d.m = shortMonthLookup[n[0].toLowerCase()], i + n[0].length) : -1;
  }

  function parseMonth(d, string, i) {
    var n = monthRe.exec(string.slice(i));
    return n ? (d.m = monthLookup[n[0].toLowerCase()], i + n[0].length) : -1;
  }

  function parseLocaleDateTime(d, string, i) {
    return parseSpecifier(d, locale_dateTime, string, i);
  }

  function parseLocaleDate(d, string, i) {
    return parseSpecifier(d, locale_date, string, i);
  }

  function parseLocaleTime(d, string, i) {
    return parseSpecifier(d, locale_time, string, i);
  }

  function formatShortWeekday(d) {
    return locale_shortWeekdays[d.getDay()];
  }

  function formatWeekday(d) {
    return locale_weekdays[d.getDay()];
  }

  function formatShortMonth(d) {
    return locale_shortMonths[d.getMonth()];
  }

  function formatMonth(d) {
    return locale_months[d.getMonth()];
  }

  function formatPeriod(d) {
    return locale_periods[+(d.getHours() >= 12)];
  }

  function formatUTCShortWeekday(d) {
    return locale_shortWeekdays[d.getUTCDay()];
  }

  function formatUTCWeekday(d) {
    return locale_weekdays[d.getUTCDay()];
  }

  function formatUTCShortMonth(d) {
    return locale_shortMonths[d.getUTCMonth()];
  }

  function formatUTCMonth(d) {
    return locale_months[d.getUTCMonth()];
  }

  function formatUTCPeriod(d) {
    return locale_periods[+(d.getUTCHours() >= 12)];
  }

  return {
    format: function(specifier) {
      var f = newFormat(specifier += "", formats);
      f.toString = function() { return specifier; };
      return f;
    },
    parse: function(specifier) {
      var p = newParse(specifier += "", localDate);
      p.toString = function() { return specifier; };
      return p;
    },
    utcFormat: function(specifier) {
      var f = newFormat(specifier += "", utcFormats);
      f.toString = function() { return specifier; };
      return f;
    },
    utcParse: function(specifier) {
      var p = newParse(specifier, utcDate);
      p.toString = function() { return specifier; };
      return p;
    }
  };
}

var pads = {"-": "", "_": " ", "0": "0"};
var numberRe = /^\s*\d+/;
var percentRe = /^%/;
var requoteRe = /[\\\^\$\*\+\?\|\[\]\(\)\.\{\}]/g;

function pad(value, fill, width) {
  var sign = value < 0 ? "-" : "",
      string = (sign ? -value : value) + "",
      length = string.length;
  return sign + (length < width ? new Array(width - length + 1).join(fill) + string : string);
}

function requote(s) {
  return s.replace(requoteRe, "\\$&");
}

function formatRe(names) {
  return new RegExp("^(?:" + names.map(requote).join("|") + ")", "i");
}

function formatLookup(names) {
  var map = {}, i = -1, n = names.length;
  while (++i < n) { map[names[i].toLowerCase()] = i; }
  return map;
}

function parseWeekdayNumber(d, string, i) {
  var n = numberRe.exec(string.slice(i, i + 1));
  return n ? (d.w = +n[0], i + n[0].length) : -1;
}

function parseWeekNumberSunday(d, string, i) {
  var n = numberRe.exec(string.slice(i));
  return n ? (d.U = +n[0], i + n[0].length) : -1;
}

function parseWeekNumberMonday(d, string, i) {
  var n = numberRe.exec(string.slice(i));
  return n ? (d.W = +n[0], i + n[0].length) : -1;
}

function parseFullYear(d, string, i) {
  var n = numberRe.exec(string.slice(i, i + 4));
  return n ? (d.y = +n[0], i + n[0].length) : -1;
}

function parseYear(d, string, i) {
  var n = numberRe.exec(string.slice(i, i + 2));
  return n ? (d.y = +n[0] + (+n[0] > 68 ? 1900 : 2000), i + n[0].length) : -1;
}

function parseZone(d, string, i) {
  var n = /^(Z)|([+-]\d\d)(?:\:?(\d\d))?/.exec(string.slice(i, i + 6));
  return n ? (d.Z = n[1] ? 0 : -(n[2] + (n[3] || "00")), i + n[0].length) : -1;
}

function parseMonthNumber(d, string, i) {
  var n = numberRe.exec(string.slice(i, i + 2));
  return n ? (d.m = n[0] - 1, i + n[0].length) : -1;
}

function parseDayOfMonth(d, string, i) {
  var n = numberRe.exec(string.slice(i, i + 2));
  return n ? (d.d = +n[0], i + n[0].length) : -1;
}

function parseDayOfYear(d, string, i) {
  var n = numberRe.exec(string.slice(i, i + 3));
  return n ? (d.m = 0, d.d = +n[0], i + n[0].length) : -1;
}

function parseHour24(d, string, i) {
  var n = numberRe.exec(string.slice(i, i + 2));
  return n ? (d.H = +n[0], i + n[0].length) : -1;
}

function parseMinutes(d, string, i) {
  var n = numberRe.exec(string.slice(i, i + 2));
  return n ? (d.M = +n[0], i + n[0].length) : -1;
}

function parseSeconds(d, string, i) {
  var n = numberRe.exec(string.slice(i, i + 2));
  return n ? (d.S = +n[0], i + n[0].length) : -1;
}

function parseMilliseconds(d, string, i) {
  var n = numberRe.exec(string.slice(i, i + 3));
  return n ? (d.L = +n[0], i + n[0].length) : -1;
}

function parseLiteralPercent(d, string, i) {
  var n = percentRe.exec(string.slice(i, i + 1));
  return n ? i + n[0].length : -1;
}

function formatDayOfMonth(d, p) {
  return pad(d.getDate(), p, 2);
}

function formatHour24(d, p) {
  return pad(d.getHours(), p, 2);
}

function formatHour12(d, p) {
  return pad(d.getHours() % 12 || 12, p, 2);
}

function formatDayOfYear(d, p) {
  return pad(1 + day.count(year(d), d), p, 3);
}

function formatMilliseconds(d, p) {
  return pad(d.getMilliseconds(), p, 3);
}

function formatMonthNumber(d, p) {
  return pad(d.getMonth() + 1, p, 2);
}

function formatMinutes(d, p) {
  return pad(d.getMinutes(), p, 2);
}

function formatSeconds(d, p) {
  return pad(d.getSeconds(), p, 2);
}

function formatWeekNumberSunday(d, p) {
  return pad(sunday.count(year(d), d), p, 2);
}

function formatWeekdayNumber(d) {
  return d.getDay();
}

function formatWeekNumberMonday(d, p) {
  return pad(monday.count(year(d), d), p, 2);
}

function formatYear(d, p) {
  return pad(d.getFullYear() % 100, p, 2);
}

function formatFullYear(d, p) {
  return pad(d.getFullYear() % 10000, p, 4);
}

function formatZone(d) {
  var z = d.getTimezoneOffset();
  return (z > 0 ? "-" : (z *= -1, "+"))
      + pad(z / 60 | 0, "0", 2)
      + pad(z % 60, "0", 2);
}

function formatUTCDayOfMonth(d, p) {
  return pad(d.getUTCDate(), p, 2);
}

function formatUTCHour24(d, p) {
  return pad(d.getUTCHours(), p, 2);
}

function formatUTCHour12(d, p) {
  return pad(d.getUTCHours() % 12 || 12, p, 2);
}

function formatUTCDayOfYear(d, p) {
  return pad(1 + utcDay.count(utcYear(d), d), p, 3);
}

function formatUTCMilliseconds(d, p) {
  return pad(d.getUTCMilliseconds(), p, 3);
}

function formatUTCMonthNumber(d, p) {
  return pad(d.getUTCMonth() + 1, p, 2);
}

function formatUTCMinutes(d, p) {
  return pad(d.getUTCMinutes(), p, 2);
}

function formatUTCSeconds(d, p) {
  return pad(d.getUTCSeconds(), p, 2);
}

function formatUTCWeekNumberSunday(d, p) {
  return pad(utcSunday.count(utcYear(d), d), p, 2);
}

function formatUTCWeekdayNumber(d) {
  return d.getUTCDay();
}

function formatUTCWeekNumberMonday(d, p) {
  return pad(utcMonday.count(utcYear(d), d), p, 2);
}

function formatUTCYear(d, p) {
  return pad(d.getUTCFullYear() % 100, p, 2);
}

function formatUTCFullYear(d, p) {
  return pad(d.getUTCFullYear() % 10000, p, 4);
}

function formatUTCZone() {
  return "+0000";
}

function formatLiteralPercent() {
  return "%";
}

var locale$1;
var timeFormat;
var timeParse;
var utcFormat;
var utcParse;

defaultLocale({
  dateTime: "%x, %X",
  date: "%-m/%-d/%Y",
  time: "%-I:%M:%S %p",
  periods: ["AM", "PM"],
  days: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
  shortDays: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"],
  months: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],
  shortMonths: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
});

function defaultLocale(definition) {
  locale$1 = formatLocale(definition);
  timeFormat = locale$1.format;
  timeParse = locale$1.parse;
  utcFormat = locale$1.utcFormat;
  utcParse = locale$1.utcParse;
  return locale$1;
}

var isoSpecifier = "%Y-%m-%dT%H:%M:%S.%LZ";

function formatIsoNative(date) {
  return date.toISOString();
}

var formatIso = Date.prototype.toISOString
    ? formatIsoNative
    : utcFormat(isoSpecifier);

function parseIsoNative(string) {
  var date = new Date(string);
  return isNaN(date) ? null : date;
}

var parseIso = +new Date("2000-01-01T00:00:00.000Z")
    ? parseIsoNative
    : utcParse(isoSpecifier);

var expandData = function(dom, data) {

    data.authors = data.authors || [];

    // paths
    data.url = "http://distill.pub/" + data.distillPath;
    data.githubUrl = "https://github.com/" + data.githubPath;

    // Homepage
    //data.homepage = !post.noHomepage;
    data.journal = data.journal || {};

    // Dates
    if (data.publishedDate){//} && data.journal) {
      data.volume = data.publishedDate.getFullYear() - 2015;
      data.issue = data.publishedDate.getMonth() + 1;
    }

    data.publishedDate = data.publishedDate ? data.publishedDate : new Date("Invalid");
    data.updatedDate = data.updatedDate ? data.updatedDate : new Date("Invalid");

    data.publishedDateRFC;
    var RFC = timeFormat("%a, %d %b %Y %H:%M:%S %Z");
    var months = ["Jan", "Feb", "March", "April", "May", "June", "July", "Aug", "Sept", "Oct", "Nov", "Dec"];
    var zeroPad = function (n) { return n < 10 ? "0" + n : n; };
    data.publishedDateRFC = RFC(data.publishedDate);
    data.publishedYear = data.publishedDate.getFullYear();
    data.publishedMonth = months[data.publishedDate.getMonth()];
    data.publishedDay = data.publishedDate.getDate();
    data.publishedMonthPadded = zeroPad(data.publishedDate.getMonth() + 1);
    data.publishedDayPadded = zeroPad(data.publishedDate.getDate());
    data.updatedDateRFC = RFC(data.updatedDate);

    if (data.authors.length  > 2) {
      data.concatenatedAuthors = data.authors[0].lastName + ", et al.";
    } else if (data.authors.length === 2) {
      data.concatenatedAuthors = data.authors[0].lastName + " & " + data.authors[1].lastName;
    } else if (data.authors.length === 1) {
      data.concatenatedAuthors = data.authors[0].lastName;
    }

    data.bibtexAuthors = data.authors.map(function(author){
      return author.lastName + ", " + author.firstName;
    }).join(" and ");

    data.slug = data.authors.length ? data.authors[0].lastName.toLowerCase() + data.publishedYear + data.title.split(" ")[0].toLowerCase() : "Untitled";

};

var favicon = "iVBORw0KGgoAAAANSUhEUgAAAEAAAABACAYAAACqaXHeAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAA99JREFUeNrsG4t1ozDMzQSM4A2ODUonKBucN2hugtIJ6E1AboLcBiQTkJsANiAb9OCd/OpzMWBJBl5TvaeXPiiyJetry0J8wW3D3QpjRh3GjneXDq+fSQA9s2mH9x3KDhN4foJfCb8N/Jrv+2fnDn8vLRQOplWHVYdvHZYdZsBcZP1vBmh/n8DzEmhUQDPaOuP9pFuY+JwJHwHnCLQE2tnWBGEyXozY9xCUgHMhhjE2I4heVWtgIkZ83wL6Qgxj1obfWBxymPwe+b00BCCRNPbwfb60yleAkkBHGT5AEehIYz7eJrFDMF9CvH4wwhcGHiHMneFvLDQwlwvMLQq58trRcYBWfYn0A0OgHWQUSu25mE+BnoYKnnEJoeIWAifzOv7vLWd2ZKRfWAIme3tOiUaQ3UnLkb0xj1FxRIeEGKaGIHOs9nEgLaaA9i0JRYo1Ic67wJW86KSKE/ZAM8KuVMk8ITVhmxUxJ3Cl2xlm9Vtkeju1+mpCQNxaEGNCY8bs9X2YqwNoQeGjBWut/ma0QAWy/TqAsHx9wSya3I5IRxOfTC+leG+kA/4vSeEcGBtNUN6byhu3+keEZCQJUNh8MAO7HL6H8pQLnsW/Hd4T4lv93TPjfM7A46iEEqbB5EDOvwYNW6tGNZzT/o+CZ6sqZ6wUtR/wf7mi/VL8iNciT6rHih48Y55b4nKCHJCCzb4y0nwFmin3ZEMIoLfZF8F7nncFmvnWBaBj7CGAYA/WGJsUwHdYqVDwAmNsUgAx4CGgAA7GOOxADYOFWOaIKifuVYzmOpREqA21Mo7aPsgiY1PhOMAmxtR+AUbYH3Id2wc0SAFIQTsn9IUGWR8k9jx3vtXSiAacFxTAGakBk9UudkNECd6jLe+6HrshshvIuC6IlLMRy7er+JpcKma24SlE4cFZSZJDGVVrsNvitQhQrDhW0jfiOLfFd47C42eHT56D/BK0To+58Ahj+cAT8HT1UWlfLZCCd/uKawzU0Rh2EyIX/Icqth3niG8ybNroezwe6khdCNxRN+l4XGdOLVLlOOt2hTRJlr1ETIuMAltVTMz70mJrkdGAaZLSmnBEqmAE32JCMmuTlCnRgsBENtOUpHhvvsYIL0ibnBkaC6QvKcR7738GKp0AKnim7xgUSNv1bpS8QwhBt8r+EP47v/oyRK/S34yJ9nT+AN0Tkm4OdB9E4BsmXM3SnMlRFUrtp6IDpV2eKzdYvF3etm3KhQksbOLChGkSmcBdmcEwvqkrMy5BzL00NZeu3qPYJOOuCc+5NjcWKXQxFvTa3NoXJ4d8in7fiAUuTt781dkvuHX4K8AA2Usy7yNKLy0AAAAASUVORK5CYII=\n";

var meta = function(dom, data) {
  var head = dom.querySelector("head");
  var appendHead = function (html) { return appendHtml(head, html); };

  function meta(name, content) {
    if (content)
      { appendHead(("    <meta name=\"" + name + "\" content=\"" + content + "\" >\n")); }
  }

  appendHead(("\n    <meta http-equiv=\"X-UA-Compatible\" content=\"IE=Edge,chrome=1\">\n    <link rel=\"icon\" type=\"image/png\" href=\"data:image/png;base64," + favicon + "\">\n    <link href=\"/rss.xml\" rel=\"alternate\" type=\"application/rss+xml\" title=\"Articles from Distill\">\n    <link rel=\"canonical\" href=\"" + (data.url) + "\">\n    <title>" + (data.title) + "</title>\n  "));

  appendHead(("\n    <!--  https://schema.org/Article -->\n    <meta property=\"article:published\" itemprop=\"datePublished\" content=\"" + (data.publishedYear) + "-" + (data.publishedMonthPadded) + "-" + (data.publishedDayPadded) + "\" />\n    <meta property=\"article:modified\" itemprop=\"dateModified\" content=\"" + (data.updatedDate) + "\" />\n  "));
  data.authors.forEach(function (a) {
    appendHtml(head, ("\n      <meta property=\"article:author\" content=\"" + (a.firstName) + " " + (a.lastName) + "\" />"));
  });

  appendHead(("\n    <!--  https://developers.facebook.com/docs/sharing/webmasters#markup -->\n    <meta property=\"og:type\" content=\"article\"/>\n    <meta property=\"og:title\" content=\"" + (data.title) + "\"/>\n    <meta property=\"og:description\" content=\"" + (data.description) + "\">\n    <meta property=\"og:url\" content=\"" + (data.url) + "\"/>\n    <meta property=\"og:image\" content=\"" + (data.url) + "/thumbnail.jpg\"/>\n    <meta property=\"og:locale\" content=\"en_US\" />\n    <meta property=\"og:site_name\" content=\"Distill\" />\n  "));

  appendHead(("\n    <!--  https://dev.twitter.com/cards/types/summary -->\n    <meta name=\"twitter:card\" content=\"summary_large_image\">\n    <meta name=\"twitter:title\" content=\"" + (data.title) + "\">\n    <meta name=\"twitter:description\" content=\"" + (data.description) + "\">\n    <meta name=\"twitter:url\" content=\"" + (data.url) + "\">\n    <meta name=\"twitter:image\" content=\"" + (data.url) + "/thumbnail.jpg\">\n    <meta name=\"twitter:image:width\" content=\"560\">\n    <meta name=\"twitter:image:height\" content=\"295\">\n  "));

  // if this is a proprer article, generate Google Scholar meta data
  if (data.doiSuffix){
    appendHead("\n      <!--  https://scholar.google.com/intl/en/scholar/inclusion.html#indexing -->\n");

    meta("citation_title", data.title);
    meta("citation_fulltext_html_url", data.url);
    meta("citation_volume", data.volume);
    meta("citation_issue", data.issue);
    meta("citation_firstpage", data.doiSuffix? ("e" + (data.doiSuffix)) : undefined);
    meta("citation_doi", data.doi);

    var journal = data.journal || {};
    meta("citation_journal_title", journal.name);
    meta("citation_journal_abbrev", journal.nameAbbrev);
    meta("citation_issn", journal.issn);
    meta("citation_publisher", journal.publisher);

    if (data.publishedDate){
      var zeroPad = function (n) { return n < 10 ? "0" + n : n; };
      meta("citation_publication_date", ((data.publishedYear) + "/" + (data.publishedMonthPadded) + "/" + (data.publishedDayPadded)));
    }

    (data.authors || []).forEach(function (a) {
        meta("citation_author", ((a.lastName) + ", " + (a.firstName)));
        meta("citation_author_institution", a.affiliation);
    });

    if (data.citations) {
      data.citations.forEach(function (key) {
        var d = data.bibliography[key];
        if(!d) {
          console.warn("No bibliography data fround for " + key);
        } else {
          meta("citation_reference", citation_meta_content(data.bibliography[key]) );
        }
      });
    }
  }
};

function appendHtml(el, html) {
  el.innerHTML += html;
}

function citation_meta_content(ref){
  var content = "citation_title=" + (ref.title) + ";";
  ref.author.split(" and ").forEach(function (author) {
    content += "citation_author=" + (author.trim()) + ";";
  });
  if ("journal" in ref){
    content += "citation_journal_title=" + (ref.journal) + ";";
  }
  if ("volume" in ref) {
      content += "citation_volume=" + (ref.volume) + ";";
  }
  if ("issue" in ref || "number" in ref){
      content += "citation_number=" + (ref.issue || ref.number) + ";";
  }
  /*content += `citation_first_page=${};`;
  content += `citation_publication_date=${};`;*/
  return content;
}

var html$1 = "\n<style>\n  dt-banner {\n    background: #FFF59D;\n    display: block;\n    text-align: center;\n    color: black;\n    height: 70px;\n    line-height: 70px;\n  }\n</style>\n<div>This article is a draft, awaiting review for publication in Distill</div>\n";

var banner = function(dom, data) {
  var banner = dom.createElement("dt-banner");
  banner.innerHTML = html$1;
  var b = dom.querySelector("body");
  b.insertBefore(banner, b.firstChild);
  banner.addEventListener("click", function() {
    banner.style.display = "none";
  });
};

var logo = "<svg viewBox=\"-607 419 64 64\">\n  <path d=\"M-573.4,478.9c-8,0-14.6-6.4-14.6-14.5s14.6-25.9,14.6-40.8c0,14.9,14.6,32.8,14.6,40.8S-565.4,478.9-573.4,478.9z\"/>\n</svg>\n";

var html$2 = "\n<style>\ndt-header {\n  display: block;\n  position: relative;\n  height: 60px;\n  background-color: hsl(223, 9%, 25%);\n  width: 100%;\n  box-sizing: border-box;\n  z-index: 2;\n  color: rgba(0, 0, 0, 0.8);\n  border-bottom: 1px solid rgba(0, 0, 0, 0.08);\n  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.05);\n}\ndt-header .content {\n  height: 70px;\n}\ndt-header a {\n  font-size: 16px;\n  height: 60px;\n  line-height: 60px;\n  text-decoration: none;\n  color: rgba(255, 255, 255, 0.8);\n  padding: 22px 0;\n}\ndt-header a:hover {\n  color: rgba(255, 255, 255, 1);\n}\ndt-header svg {\n  width: 24px;\n  position: relative;\n  top: 4px;\n  margin-right: 2px;\n}\n\n@media(min-width: 1080px) {\n  dt-header {\n    height: 70px;\n  }\n  dt-header a {\n    height: 70px;\n    line-height: 70px;\n    padding: 28px 0;\n  }\n  dt-header .logo {\n  }\n}\n\ndt-header svg path {\n  fill: none;\n  stroke: rgba(255, 255, 255, 0.8);\n  stroke-width: 3px;\n}\ndt-header .logo {\n  font-size: 13px;\n  font-weight: 300;\n  text-transform: uppercase;\n}\ndt-header .nav {\n  float: right;\n  font-weight: 300;\n}\ndt-header .nav a {\n  font-size: 14px;\n}\n</style>\n\n<div class=\"content l-page\">\n  <a href=\"/\" class=\"logo\">\n    " + logo + "\n    Distill\n  </a>\n  <div class=\"nav\">\n    <a href=\"/faq\">About</a>\n    <!-- https://twitter.com/distillpub -->\n  </div>\n</div>\n";

var header = function(dom, data) {
  var el = dom.querySelector("dt-header");
  if(el) {
    el.innerHTML = html$2;
  } else {
    var header = dom.createElement("dt-header");
    header.innerHTML = html$2;
    var b = dom.querySelector("body");
    b.insertBefore(header, b.firstChild);
  }
};

var mustache = createCommonjsModule(function (module, exports) {
/*!
 * mustache.js - Logic-less {{mustache}} templates with JavaScript
 * http://github.com/janl/mustache.js
 */

/*global define: false Mustache: true*/

(function defineMustache (global, factory) {
  if ('object' === 'object' && exports && typeof exports.nodeName !== 'string') {
    factory(exports); // CommonJS
  } else if (typeof undefined === 'function' && undefined.amd) {
    undefined(['exports'], factory); // AMD
  } else {
    global.Mustache = {};
    factory(global.Mustache); // script, wsh, asp
  }
}(commonjsGlobal, function mustacheFactory (mustache) {

  var objectToString = Object.prototype.toString;
  var isArray = Array.isArray || function isArrayPolyfill (object) {
    return objectToString.call(object) === '[object Array]';
  };

  function isFunction (object) {
    return typeof object === 'function';
  }

  /**
   * More correct typeof string handling array
   * which normally returns typeof 'object'
   */
  function typeStr (obj) {
    return isArray(obj) ? 'array' : typeof obj;
  }

  function escapeRegExp (string) {
    return string.replace(/[\-\[\]{}()*+?.,\\\^$|#\s]/g, '\\$&');
  }

  /**
   * Null safe way of checking whether or not an object,
   * including its prototype, has a given property
   */
  function hasProperty (obj, propName) {
    return obj != null && typeof obj === 'object' && (propName in obj);
  }

  // Workaround for https://issues.apache.org/jira/browse/COUCHDB-577
  // See https://github.com/janl/mustache.js/issues/189
  var regExpTest = RegExp.prototype.test;
  function testRegExp (re, string) {
    return regExpTest.call(re, string);
  }

  var nonSpaceRe = /\S/;
  function isWhitespace (string) {
    return !testRegExp(nonSpaceRe, string);
  }

  var entityMap = {
    '&': '&amp;',
    '<': '&lt;',
    '>': '&gt;',
    '"': '&quot;',
    "'": '&#39;',
    '/': '&#x2F;',
    '`': '&#x60;',
    '=': '&#x3D;'
  };

  function escapeHtml (string) {
    return String(string).replace(/[&<>"'`=\/]/g, function fromEntityMap (s) {
      return entityMap[s];
    });
  }

  var whiteRe = /\s*/;
  var spaceRe = /\s+/;
  var equalsRe = /\s*=/;
  var curlyRe = /\s*\}/;
  var tagRe = /#|\^|\/|>|\{|&|=|!/;

  /**
   * Breaks up the given `template` string into a tree of tokens. If the `tags`
   * argument is given here it must be an array with two string values: the
   * opening and closing tags used in the template (e.g. [ "<%", "%>" ]). Of
   * course, the default is to use mustaches (i.e. mustache.tags).
   *
   * A token is an array with at least 4 elements. The first element is the
   * mustache symbol that was used inside the tag, e.g. "#" or "&". If the tag
   * did not contain a symbol (i.e. {{myValue}}) this element is "name". For
   * all text that appears outside a symbol this element is "text".
   *
   * The second element of a token is its "value". For mustache tags this is
   * whatever else was inside the tag besides the opening symbol. For text tokens
   * this is the text itself.
   *
   * The third and fourth elements of the token are the start and end indices,
   * respectively, of the token in the original template.
   *
   * Tokens that are the root node of a subtree contain two more elements: 1) an
   * array of tokens in the subtree and 2) the index in the original template at
   * which the closing tag for that section begins.
   */
  function parseTemplate (template, tags) {
    if (!template)
      { return []; }

    var sections = [];     // Stack to hold section tokens
    var tokens = [];       // Buffer to hold the tokens
    var spaces = [];       // Indices of whitespace tokens on the current line
    var hasTag = false;    // Is there a {{tag}} on the current line?
    var nonSpace = false;  // Is there a non-space char on the current line?

    // Strips all whitespace tokens array for the current line
    // if there was a {{#tag}} on it and otherwise only space.
    function stripSpace () {
      if (hasTag && !nonSpace) {
        while (spaces.length)
          { delete tokens[spaces.pop()]; }
      } else {
        spaces = [];
      }

      hasTag = false;
      nonSpace = false;
    }

    var openingTagRe, closingTagRe, closingCurlyRe;
    function compileTags (tagsToCompile) {
      if (typeof tagsToCompile === 'string')
        { tagsToCompile = tagsToCompile.split(spaceRe, 2); }

      if (!isArray(tagsToCompile) || tagsToCompile.length !== 2)
        { throw new Error('Invalid tags: ' + tagsToCompile); }

      openingTagRe = new RegExp(escapeRegExp(tagsToCompile[0]) + '\\s*');
      closingTagRe = new RegExp('\\s*' + escapeRegExp(tagsToCompile[1]));
      closingCurlyRe = new RegExp('\\s*' + escapeRegExp('}' + tagsToCompile[1]));
    }

    compileTags(tags || mustache.tags);

    var scanner = new Scanner(template);

    var start, type, value, chr, token, openSection;
    while (!scanner.eos()) {
      start = scanner.pos;

      // Match any text between tags.
      value = scanner.scanUntil(openingTagRe);

      if (value) {
        for (var i = 0, valueLength = value.length; i < valueLength; ++i) {
          chr = value.charAt(i);

          if (isWhitespace(chr)) {
            spaces.push(tokens.length);
          } else {
            nonSpace = true;
          }

          tokens.push([ 'text', chr, start, start + 1 ]);
          start += 1;

          // Check for whitespace on the current line.
          if (chr === '\n')
            { stripSpace(); }
        }
      }

      // Match the opening tag.
      if (!scanner.scan(openingTagRe))
        { break; }

      hasTag = true;

      // Get the tag type.
      type = scanner.scan(tagRe) || 'name';
      scanner.scan(whiteRe);

      // Get the tag value.
      if (type === '=') {
        value = scanner.scanUntil(equalsRe);
        scanner.scan(equalsRe);
        scanner.scanUntil(closingTagRe);
      } else if (type === '{') {
        value = scanner.scanUntil(closingCurlyRe);
        scanner.scan(curlyRe);
        scanner.scanUntil(closingTagRe);
        type = '&';
      } else {
        value = scanner.scanUntil(closingTagRe);
      }

      // Match the closing tag.
      if (!scanner.scan(closingTagRe))
        { throw new Error('Unclosed tag at ' + scanner.pos); }

      token = [ type, value, start, scanner.pos ];
      tokens.push(token);

      if (type === '#' || type === '^') {
        sections.push(token);
      } else if (type === '/') {
        // Check section nesting.
        openSection = sections.pop();

        if (!openSection)
          { throw new Error('Unopened section "' + value + '" at ' + start); }

        if (openSection[1] !== value)
          { throw new Error('Unclosed section "' + openSection[1] + '" at ' + start); }
      } else if (type === 'name' || type === '{' || type === '&') {
        nonSpace = true;
      } else if (type === '=') {
        // Set the tags for the next time around.
        compileTags(value);
      }
    }

    // Make sure there are no open sections when we're done.
    openSection = sections.pop();

    if (openSection)
      { throw new Error('Unclosed section "' + openSection[1] + '" at ' + scanner.pos); }

    return nestTokens(squashTokens(tokens));
  }

  /**
   * Combines the values of consecutive text tokens in the given `tokens` array
   * to a single token.
   */
  function squashTokens (tokens) {
    var squashedTokens = [];

    var token, lastToken;
    for (var i = 0, numTokens = tokens.length; i < numTokens; ++i) {
      token = tokens[i];

      if (token) {
        if (token[0] === 'text' && lastToken && lastToken[0] === 'text') {
          lastToken[1] += token[1];
          lastToken[3] = token[3];
        } else {
          squashedTokens.push(token);
          lastToken = token;
        }
      }
    }

    return squashedTokens;
  }

  /**
   * Forms the given array of `tokens` into a nested tree structure where
   * tokens that represent a section have two additional items: 1) an array of
   * all tokens that appear in that section and 2) the index in the original
   * template that represents the end of that section.
   */
  function nestTokens (tokens) {
    var nestedTokens = [];
    var collector = nestedTokens;
    var sections = [];

    var token, section;
    for (var i = 0, numTokens = tokens.length; i < numTokens; ++i) {
      token = tokens[i];

      switch (token[0]) {
        case '#':
        case '^':
          collector.push(token);
          sections.push(token);
          collector = token[4] = [];
          break;
        case '/':
          section = sections.pop();
          section[5] = token[2];
          collector = sections.length > 0 ? sections[sections.length - 1][4] : nestedTokens;
          break;
        default:
          collector.push(token);
      }
    }

    return nestedTokens;
  }

  /**
   * A simple string scanner that is used by the template parser to find
   * tokens in template strings.
   */
  function Scanner (string) {
    this.string = string;
    this.tail = string;
    this.pos = 0;
  }

  /**
   * Returns `true` if the tail is empty (end of string).
   */
  Scanner.prototype.eos = function eos () {
    return this.tail === '';
  };

  /**
   * Tries to match the given regular expression at the current position.
   * Returns the matched text if it can match, the empty string otherwise.
   */
  Scanner.prototype.scan = function scan (re) {
    var match = this.tail.match(re);

    if (!match || match.index !== 0)
      { return ''; }

    var string = match[0];

    this.tail = this.tail.substring(string.length);
    this.pos += string.length;

    return string;
  };

  /**
   * Skips all text until the given regular expression can be matched. Returns
   * the skipped string, which is the entire tail if no match can be made.
   */
  Scanner.prototype.scanUntil = function scanUntil (re) {
    var index = this.tail.search(re), match;

    switch (index) {
      case -1:
        match = this.tail;
        this.tail = '';
        break;
      case 0:
        match = '';
        break;
      default:
        match = this.tail.substring(0, index);
        this.tail = this.tail.substring(index);
    }

    this.pos += match.length;

    return match;
  };

  /**
   * Represents a rendering context by wrapping a view object and
   * maintaining a reference to the parent context.
   */
  function Context (view, parentContext) {
    this.view = view;
    this.cache = { '.': this.view };
    this.parent = parentContext;
  }

  /**
   * Creates a new context using the given view with this context
   * as the parent.
   */
  Context.prototype.push = function push (view) {
    return new Context(view, this);
  };

  /**
   * Returns the value of the given name in this context, traversing
   * up the context hierarchy if the value is absent in this context's view.
   */
  Context.prototype.lookup = function lookup (name) {
    var cache = this.cache;

    var value;
    if (cache.hasOwnProperty(name)) {
      value = cache[name];
    } else {
      var context = this, names, index, lookupHit = false;

      while (context) {
        if (name.indexOf('.') > 0) {
          value = context.view;
          names = name.split('.');
          index = 0;

          /**
           * Using the dot notion path in `name`, we descend through the
           * nested objects.
           *
           * To be certain that the lookup has been successful, we have to
           * check if the last object in the path actually has the property
           * we are looking for. We store the result in `lookupHit`.
           *
           * This is specially necessary for when the value has been set to
           * `undefined` and we want to avoid looking up parent contexts.
           **/
          while (value != null && index < names.length) {
            if (index === names.length - 1)
              { lookupHit = hasProperty(value, names[index]); }

            value = value[names[index++]];
          }
        } else {
          value = context.view[name];
          lookupHit = hasProperty(context.view, name);
        }

        if (lookupHit)
          { break; }

        context = context.parent;
      }

      cache[name] = value;
    }

    if (isFunction(value))
      { value = value.call(this.view); }

    return value;
  };

  /**
   * A Writer knows how to take a stream of tokens and render them to a
   * string, given a context. It also maintains a cache of templates to
   * avoid the need to parse the same template twice.
   */
  function Writer () {
    this.cache = {};
  }

  /**
   * Clears all cached templates in this writer.
   */
  Writer.prototype.clearCache = function clearCache () {
    this.cache = {};
  };

  /**
   * Parses and caches the given `template` and returns the array of tokens
   * that is generated from the parse.
   */
  Writer.prototype.parse = function parse (template, tags) {
    var cache = this.cache;
    var tokens = cache[template];

    if (tokens == null)
      { tokens = cache[template] = parseTemplate(template, tags); }

    return tokens;
  };

  /**
   * High-level method that is used to render the given `template` with
   * the given `view`.
   *
   * The optional `partials` argument may be an object that contains the
   * names and templates of partials that are used in the template. It may
   * also be a function that is used to load partial templates on the fly
   * that takes a single argument: the name of the partial.
   */
  Writer.prototype.render = function render (template, view, partials) {
    var tokens = this.parse(template);
    var context = (view instanceof Context) ? view : new Context(view);
    return this.renderTokens(tokens, context, partials, template);
  };

  /**
   * Low-level method that renders the given array of `tokens` using
   * the given `context` and `partials`.
   *
   * Note: The `originalTemplate` is only ever used to extract the portion
   * of the original template that was contained in a higher-order section.
   * If the template doesn't use higher-order sections, this argument may
   * be omitted.
   */
  Writer.prototype.renderTokens = function renderTokens (tokens, context, partials, originalTemplate) {
    var this$1 = this;

    var buffer = '';

    var token, symbol, value;
    for (var i = 0, numTokens = tokens.length; i < numTokens; ++i) {
      value = undefined;
      token = tokens[i];
      symbol = token[0];

      if (symbol === '#') { value = this$1.renderSection(token, context, partials, originalTemplate); }
      else if (symbol === '^') { value = this$1.renderInverted(token, context, partials, originalTemplate); }
      else if (symbol === '>') { value = this$1.renderPartial(token, context, partials, originalTemplate); }
      else if (symbol === '&') { value = this$1.unescapedValue(token, context); }
      else if (symbol === 'name') { value = this$1.escapedValue(token, context); }
      else if (symbol === 'text') { value = this$1.rawValue(token); }

      if (value !== undefined)
        { buffer += value; }
    }

    return buffer;
  };

  Writer.prototype.renderSection = function renderSection (token, context, partials, originalTemplate) {
    var this$1 = this;

    var self = this;
    var buffer = '';
    var value = context.lookup(token[1]);

    // This function is used to render an arbitrary template
    // in the current context by higher-order sections.
    function subRender (template) {
      return self.render(template, context, partials);
    }

    if (!value) { return; }

    if (isArray(value)) {
      for (var j = 0, valueLength = value.length; j < valueLength; ++j) {
        buffer += this$1.renderTokens(token[4], context.push(value[j]), partials, originalTemplate);
      }
    } else if (typeof value === 'object' || typeof value === 'string' || typeof value === 'number') {
      buffer += this.renderTokens(token[4], context.push(value), partials, originalTemplate);
    } else if (isFunction(value)) {
      if (typeof originalTemplate !== 'string')
        { throw new Error('Cannot use higher-order sections without the original template'); }

      // Extract the portion of the original template that the section contains.
      value = value.call(context.view, originalTemplate.slice(token[3], token[5]), subRender);

      if (value != null)
        { buffer += value; }
    } else {
      buffer += this.renderTokens(token[4], context, partials, originalTemplate);
    }
    return buffer;
  };

  Writer.prototype.renderInverted = function renderInverted (token, context, partials, originalTemplate) {
    var value = context.lookup(token[1]);

    // Use JavaScript's definition of falsy. Include empty arrays.
    // See https://github.com/janl/mustache.js/issues/186
    if (!value || (isArray(value) && value.length === 0))
      { return this.renderTokens(token[4], context, partials, originalTemplate); }
  };

  Writer.prototype.renderPartial = function renderPartial (token, context, partials) {
    if (!partials) { return; }

    var value = isFunction(partials) ? partials(token[1]) : partials[token[1]];
    if (value != null)
      { return this.renderTokens(this.parse(value), context, partials, value); }
  };

  Writer.prototype.unescapedValue = function unescapedValue (token, context) {
    var value = context.lookup(token[1]);
    if (value != null)
      { return value; }
  };

  Writer.prototype.escapedValue = function escapedValue (token, context) {
    var value = context.lookup(token[1]);
    if (value != null)
      { return mustache.escape(value); }
  };

  Writer.prototype.rawValue = function rawValue (token) {
    return token[1];
  };

  mustache.name = 'mustache.js';
  mustache.version = '2.3.0';
  mustache.tags = [ '{{', '}}' ];

  // All high-level mustache.* functions use this writer.
  var defaultWriter = new Writer();

  /**
   * Clears all cached templates in the default writer.
   */
  mustache.clearCache = function clearCache () {
    return defaultWriter.clearCache();
  };

  /**
   * Parses and caches the given template in the default writer and returns the
   * array of tokens it contains. Doing this ahead of time avoids the need to
   * parse templates on the fly as they are rendered.
   */
  mustache.parse = function parse (template, tags) {
    return defaultWriter.parse(template, tags);
  };

  /**
   * Renders the `template` with the given `view` and `partials` using the
   * default writer.
   */
  mustache.render = function render (template, view, partials) {
    if (typeof template !== 'string') {
      throw new TypeError('Invalid template! Template should be a "string" ' +
                          'but "' + typeStr(template) + '" was given as the first ' +
                          'argument for mustache#render(template, view, partials)');
    }

    return defaultWriter.render(template, view, partials);
  };

  // This is here for backwards compatibility with 0.4.x.,
  /*eslint-disable */ // eslint wants camel cased function name
  mustache.to_html = function to_html (template, view, partials, send) {
    /*eslint-enable*/

    var result = mustache.render(template, view, partials);

    if (isFunction(send)) {
      send(result);
    } else {
      return result;
    }
  };

  // Export the escaping function so that the user may override it.
  // See https://github.com/janl/mustache.js/issues/244
  mustache.escape = escapeHtml;

  // Export these mainly for testing, but also for advanced usage.
  mustache.Scanner = Scanner;
  mustache.Context = Context;
  mustache.Writer = Writer;

  return mustache;
}));
});

var html$3 = "\n<style>\n  dt-byline {\n    font-size: 12px;\n    line-height: 18px;\n    display: block;\n    border-top: 1px solid rgba(0, 0, 0, 0.1);\n    border-bottom: 1px solid rgba(0, 0, 0, 0.1);\n    color: rgba(0, 0, 0, 0.5);\n    padding-top: 12px;\n    padding-bottom: 12px;\n  }\n  dt-article.centered dt-byline {\n    text-align: center;\n\n  }\n  dt-byline a,\n  dt-article dt-byline a {\n    text-decoration: none;\n    border-bottom: none;\n  }\n  dt-article dt-byline a:hover {\n    text-decoration: underline;\n    border-bottom: none;\n  }\n  dt-byline .authors {\n    text-align: left;\n  }\n  dt-byline .name {\n    display: inline;\n    text-transform: uppercase;\n  }\n  dt-byline .affiliation {\n    display: inline;\n  }\n  dt-byline .date {\n    display: block;\n    text-align: left;\n  }\n  dt-byline .year, dt-byline .month {\n    display: inline;\n  }\n  dt-byline .citation {\n    display: block;\n    text-align: left;\n  }\n  dt-byline .citation div {\n    display: inline;\n  }\n\n  @media(min-width: 768px) {\n    dt-byline {\n    }\n  }\n\n  @media(min-width: 1080px) {\n    dt-byline {\n      border-bottom: none;\n      margin-bottom: 70px;\n    }\n\n    dt-byline a:hover {\n      color: rgba(0, 0, 0, 0.9);\n    }\n\n    dt-byline .authors {\n      display: inline-block;\n    }\n\n    dt-byline .author {\n      display: inline-block;\n      margin-right: 12px;\n      /*padding-left: 20px;*/\n      /*border-left: 1px solid #ddd;*/\n    }\n\n    dt-byline .affiliation {\n      display: block;\n    }\n\n    dt-byline .author:last-child {\n      margin-right: 0;\n    }\n\n    dt-byline .name {\n      display: block;\n    }\n\n    dt-byline .date {\n      border-left: 1px solid rgba(0, 0, 0, 0.1);\n      padding-left: 15px;\n      margin-left: 15px;\n      display: inline-block;\n    }\n    dt-byline .year, dt-byline .month {\n      display: block;\n    }\n\n    dt-byline .citation {\n      border-left: 1px solid rgba(0, 0, 0, 0.15);\n      padding-left: 15px;\n      margin-left: 15px;\n      display: inline-block;\n    }\n    dt-byline .citation div {\n      display: block;\n    }\n  }\n</style>\n\n";

var template = "\n<div class=\"byline\">\n  <div class=\"authors\">\n  {{#authors}}\n    <div class=\"author\">\n      {{#personalURL}}\n        <a class=\"name\" href=\"{{personalURL}}\">{{name}}</a>\n      {{/personalURL}}\n      {{^personalURL}}\n        <div class=\"name\">{{name}}</div>\n      {{/personalURL}}\n      {{#affiliation}}\n        {{#affiliationURL}}\n          <a class=\"affiliation\" href=\"{{affiliationURL}}\">{{affiliation}}</a>\n        {{/affiliationURL}}\n        {{^affiliationURL}}\n          <div class=\"affiliation\">{{affiliation}}</div>\n        {{/affiliationURL}}\n      {{/affiliation}}\n    </div>\n    {{/authors}}\n  </div>\n  <div class=\"date\">\n    <div class=\"month\">{{publishedMonth}}. {{publishedDay}}</div>\n    <div class=\"year\">{{publishedYear}}</div>\n  </div>\n  <a class=\"citation\" href=\"#citation\">\n    <div>Citation:</div>\n    <div>{{concatenatedAuthors}}, {{publishedYear}}</div>\n  </a>\n</div>\n";

var byline = function(dom, data) {
  var el = dom.querySelector('dt-byline');
  if (el) {
    el.innerHTML = html$3 + mustache.render(template, data);
  }
};

var html$4 = "\n<style>\n  dt-appendix {\n    display: block;\n    font-size: 14px;\n    line-height: 24px;\n    margin-bottom: 0;\n    border-top: 1px solid rgba(0,0,0,0.1);\n    color: rgba(0,0,0,0.5);\n    background: rgb(250, 250, 250);\n    padding-top: 36px;\n    padding-bottom: 60px;\n  }\n  dt-appendix h3 {\n    font-size: 16px;\n    font-weight: 500;\n    margin-top: 18px;\n    margin-bottom: 18px;\n    color: rgba(0,0,0,0.65);\n  }\n  dt-appendix .citation {\n    font-size: 11px;\n    line-height: 15px;\n    border-left: 1px solid rgba(0, 0, 0, 0.1);\n    padding-left: 18px;\n    border: 1px solid rgba(0,0,0,0.1);\n    background: rgba(0, 0, 0, 0.02);\n    padding: 10px 18px;\n    border-radius: 3px;\n    color: rgba(150, 150, 150, 1);\n    overflow: hidden;\n    margin-top: -12px;\n  }\n  dt-appendix .references {\n    font-size: 12px;\n    line-height: 20px;\n  }\n  dt-appendix a {\n    color: rgba(0, 0, 0, 0.6);\n  }\n  dt-appendix ol,\n  dt-appendix ul {\n    padding-left: 24px;\n  }\n</style>\n\n<div class=\"l-body\">\n  <h3>References</h3>\n  <dt-bibliography></dt-bibliography>\n  <h3 id=\"citation\">Errors, Reuse, and Citation</h3>\n  <p>If you see mistakes or want to suggest changes, please <a class=\"github-issue\">create an issue on GitHub</a>.</p>\n  <p>Diagrams and text are licensed under Creative Commons Attribution <a href=\"https://creativecommons.org/licenses/by/2.0/\">CC-BY 2.0</a>, unless noted otherwise, with the <a class=\"github\">source available on GitHub</a>. The figures that have been reused from other sources don't fall under this license and can be recognized by a note in their caption: “Figure from …”.</p>\n  <p>For attribution in academic contexts, please cite this work as</p>\n  <pre class=\"citation short\"></pre>\n  <p>BibTeX citation</p>\n  <pre class=\"citation long\"></pre>\n</div>\n";

var appendix = function(dom, data) {
  var el = dom.querySelector('dt-appendix');
  if (el) {
    var oldHtml = el.innerHTML;
    el.innerHTML = html$4;
    var div = el.querySelector("div.l-body");

    if (dom.querySelector("dt-fn")) {
      div.innerHTML = "<h3>Footnotes</h3><dt-fn-list></dt-fn-list>" + div.innerHTML;
    }

    div.innerHTML = oldHtml + div.innerHTML;
    console.log(data.githubCompareUpdatesUrl);
    if (data.githubCompareUpdatesUrl) {
      div.innerHTML = "<h3>Updates</h3><p><a href=\"" + (data.githubCompareUpdatesUrl) + "\">View all changes</a> to this article since it was first published.</p>" + div.innerHTML;
    }

    el.querySelector("a.github").setAttribute("href", data.githubUrl);
    el.querySelector("a.github-issue").setAttribute("href", data.githubUrl + "/issues/new");
    el.querySelector(".citation.short").textContent = data.concatenatedAuthors + ", " + '"' + data.title + '", Distill, ' + data.publishedYear + ".";
    var bibtex  = "@article{" + data.slug + ",\n";
        bibtex += "  author = {" + data.bibtexAuthors + "},\n";
        bibtex += "  title = {" + data.title + "},\n";
        bibtex += "  journal = {Distill},\n";
        bibtex += "  year = {" + data.publishedYear + "},\n";
        bibtex += "  note = {" + data.url + "}\n";
        bibtex += "}";
    el.querySelector(".citation.long").textContent = bibtex;
  }

};

var html$5 = "\n<style>\ndt-footer {\n  display: block;\n  color: rgba(255, 255, 255, 0.4);\n  font-weight: 300;\n  padding: 40px 0;\n  border-top: 1px solid rgba(0, 0, 0, 0.1);\n  background-color: hsl(223, 9%, 25%);\n  text-align: center;\n}\ndt-footer .logo svg {\n  width: 24px;\n  position: relative;\n  top: 4px;\n  margin-right: 2px;\n}\ndt-footer .logo svg path {\n  fill: none;\n  stroke: rgba(255, 255, 255, 0.8);\n  stroke-width: 3px;\n}\ndt-footer .logo {\n  font-size: 13px;\n  font-weight: 300;\n  text-transform: uppercase;\n  color: rgba(255, 255, 255, 0.8);\n  text-decoration: none;\n  margin-right: 6px;\n}\n</style>\n\n<div class=\"l-screen-inset\">\n  <a href=\"/\" class=\"logo\">\n    " + logo + "\n    Distill\n  </a> is dedicated to clear explanations of machine learning\n</div>\n";

var footer = function(dom, data) {
  var el = dom.querySelector("dt-footer");
  if(el) {
    el.innerHTML = html$5;
  } else {
    var footer = dom.createElement("dt-footer");
    footer.innerHTML = html$5;
    var b = dom.querySelector("body");
    b.appendChild(footer);
  }
};

var citation = function(dom, data) {
  var css = "\n    dt-cite {\n      color: hsla(206, 90%, 20%, 0.7);\n    }\n    dt-cite .citation-number {\n      cursor: default;\n      white-space: nowrap;\n      font-family: -apple-system, BlinkMacSystemFont, \"Roboto\", Helvetica, sans-serif;\n      font-size: 75%;\n      color: hsla(206, 90%, 20%, 0.7);\n      display: inline-block;\n      line-height: 1.1em;\n      text-align: center;\n      position: relative;\n      top: -2px;\n      margin: 0 2px;\n    }\n    figcaption dt-cite .citation-number {\n      font-size: 11px;\n      font-weight: normal;\n      top: -2px;\n      line-height: 1em;\n    }\n  ";

  var style = dom.createElement("style");
  style.textContent = css;
  dom.querySelector("body").appendChild(style);

  var citations = data.citations;
  /*if (data.citations) {
    citations = Object.keys(data.citations).map(c => data.citations[c]);
    citations.sort((a, b) => {
      return a.author.localeCompare(b.author);
    });
  }*/

  var citeTags = [].slice.apply(dom.querySelectorAll("dt-cite"));
  citeTags.forEach(function (el,n) {
    var key = el.getAttribute("key");
    if (key) {
      var keys = key.split(",");
      var cite_string = inline_cite_short(keys);
      var cite_hover_str = "";
      keys.map(function (key,n) {
        if (n>0) { cite_hover_str += "<br><br>"; }
        cite_hover_str += hover_cite(data.bibliography[key]);
      });
      cite_hover_str = cite_hover_str.replace(/"/g, "&#39;");
      var orig_string = el.innerHTML;
      if (orig_string != "") { orig_string += " "; }
      el.innerHTML = "<span id=\"citation-" + n + "\" data-hover=\"" + cite_hover_str + "\">" + orig_string + "<span class=\"citation-number\">" + cite_string + "</span></span>";
    }
  });

  var bibEl = dom.querySelector("dt-bibliography");
  if (bibEl) {
    var ol = dom.createElement("ol");
    citations.forEach(function (key) {
      var el = dom.createElement("li");
      el.innerHTML = bibliography_cite(data.bibliography[key]);
      ol.appendChild(el);
    });
    bibEl.appendChild(ol);
  }

  function inline_cite_short(keys){
    function cite_string(key){
      if (key in data.bibliography){
        var n = data.citations.indexOf(key)+1;
        return ""+n;
      } else {
        return "?";
      }
    }
    return "["+keys.map(cite_string).join(", ")+"]";
  }

  function inline_cite_long(keys){
    function cite_string(key){
      if (key in data.bibliography){
        var ent = data.bibliography[key];
        var names = ent.author.split(" and ");
        names = names.map(function (name) { return name.split(",")[0].trim(); });
        var year = ent.year;
        if (names.length == 1) { return names[0] + ", " + year; }
        if (names.length == 2) { return names[0] + " & " + names[1] + ", " + year; }
        if (names.length  > 2) { return names[0] + ", et al., " + year; }
      } else {
        return "?";
      }
    }
    return keys.map(cite_string).join(", ");
  }

  function author_string(ent, template, sep, finalSep){
    var names = ent.author.split(" and ");
    var name_strings = names.map(function (name) {
      name = name.trim();
      if (name.indexOf(",") != -1){
        var last = name.split(",")[0].trim();
        var firsts = name.split(",")[1];
      } else {
        var last = name.split(" ").slice(-1)[0].trim();
        var firsts = name.split(" ").slice(0,-1).join(" ");
      }
      var initials = "";
      if (firsts != undefined) {
        initials = firsts.trim().split(" ").map(function (s) { return s.trim()[0]; });
        initials = initials.join(".")+".";
      }
      return template.replace("${F}", firsts)
                     .replace("${L}", last)
                     .replace("${I}", initials);
    });
    if (names.length > 1) {
      var str = name_strings.slice(0, names.length-1).join(sep);
      str += (finalSep || sep) + name_strings[names.length-1];
      return str;
    } else {
      return name_strings[0];
    }
  }

  function venue_string(ent) {
    var cite = (ent.journal || ent.booktitle || "");
    if ("volume" in ent){
      var issue = ent.issue || ent.number;
      issue = (issue != undefined)? "("+issue+")" : "";
      cite += ", Vol " + ent.volume + issue;
    }
    if ("pages" in ent){
      cite += ", pp. " + ent.pages;
    }
    if (cite != "") { cite += ". "; }
    if ("publisher" in ent){
      cite += ent.publisher;
      if (cite[cite.length-1] != ".") { cite += "."; }
    }
    return cite;
  }

  function link_string(ent){
    if ("url" in ent){
      var url = ent.url;
      var arxiv_match = (/arxiv\.org\/abs\/([0-9\.]*)/).exec(url);
      if (arxiv_match != null){
        url = "http://arxiv.org/pdf/" + (arxiv_match[1]) + ".pdf";
      }

      if (url.slice(-4) == ".pdf"){
        var label = "PDF";
      } else if (url.slice(-5) == ".html") {
        var label = "HTML";
      }
      return (" &ensp;<a href=\"" + url + "\">[" + (label||"link") + "]</a>");
    }/* else if ("doi" in ent){
      return ` &ensp;<a href="https://doi.org/${ent.doi}" >[DOI]</a>`;
    }*/ else {
      return "";
    }
  }
  function doi_string(ent, new_line){
    if ("doi" in ent) {
      return ((new_line?"<br>":"") + " <a href=\"https://doi.org/" + (ent.doi) + "\" style=\"text-decoration:inherit;\">DOI: " + (ent.doi) + "</a>");
    } else {
      return "";
    }
  }

  function bibliography_cite(ent, fancy){
    if (ent){
      var cite =  "<b>" + ent.title + "</b> ";
      cite += link_string(ent) + "<br>";
      cite += author_string(ent, "${L}, ${I}", ", ", " and ");
      if (ent.year || ent.date){
        cite += ", " + (ent.year || ent.date) + ". ";
      } else {
        cite += ". ";
      }
      cite += venue_string(ent);
      cite += doi_string(ent);
      return cite
      /*var cite =  author_string(ent, "${L}, ${I}", ", ", " and ");
      if (ent.year || ent.date){
        cite += ", " + (ent.year || ent.date) + ". "
      } else {
        cite += ". "
      }
      cite += "<b>" + ent.title + "</b>. ";
      cite += venue_string(ent);
      cite += doi_string(ent);
      cite += link_string(ent);
      return cite*/
    } else {
      return "?";
    }
  }

  function hover_cite(ent){
    if (ent){
      var cite = "";
      cite += "<b>" + ent.title + "</b>";
      cite += link_string(ent);
      cite += "<br>";

      var a_str = author_string(ent, "${I} ${L}", ", ") + ".";
      var v_str = venue_string(ent).trim() + " " + ent.year + ". " + doi_string(ent, true);

      if ((a_str+v_str).length < Math.min(40, ent.title.length)) {
        cite += a_str + " " + v_str;
      } else {
        cite += a_str + "<br>" + v_str;
      }
      return cite;
    } else {
      return "?";
    }
  }


  //https://scholar.google.com/scholar?q=allintitle%3ADocument+author%3Aolah
  function get_GS_URL(ent){
    if (ent){
      var names = ent.author.split(" and ");
      names = names.map(function (name) { return name.split(",")[0].trim(); });
      var title = ent.title.split(" ");//.replace(/[,:]/, "")
      var url = "http://search.labs.crossref.org/dois?";//""https://scholar.google.com/scholar?"
      url += uris({q: names.join(" ") + " " + title.join(" ")});
    }

  }
};

var footnote = function(dom, data) {

  var fnTags = [].slice.apply(dom.querySelectorAll("dt-fn"));
  var fnContent = [];
  fnTags.forEach(function (el,n) {
    var content = el.innerHTML;
    fnContent.push(content);
    n = (n+1)+"";
    var key = "fn-"+n;
    var escaped_content = content.replace(/"/g, "&#39;");
    el.innerHTML = "<sup><span id=\"" + key + "\" data-hover=\"" + escaped_content + "\" style=\"cursor:pointer\">" + n + "</span></sup>";
  });

  var fnList = dom.querySelector("dt-fn-list");
  if (fnList) {
    var ol = dom.createElement("ol");
    fnContent.forEach(function (content) {
      var el = dom.createElement("li");
      el.innerHTML = content;
      ol.appendChild(el);
    });
    fnList.appendChild(ol);
  }

};

var marked = createCommonjsModule(function (module, exports) {
/**
 * marked - a markdown parser
 * Copyright (c) 2011-2014, Christopher Jeffrey. (MIT Licensed)
 * https://github.com/chjj/marked
 */

(function() {

/**
 * Block-Level Grammar
 */

var block = {
  newline: /^\n+/,
  code: /^( {4}[^\n]+\n*)+/,
  fences: noop,
  hr: /^( *[-*_]){3,} *(?:\n+|$)/,
  heading: /^ *(#{1,6}) *([^\n]+?) *#* *(?:\n+|$)/,
  nptable: noop,
  lheading: /^([^\n]+)\n *(=|-){2,} *(?:\n+|$)/,
  blockquote: /^( *>[^\n]+(\n(?!def)[^\n]+)*\n*)+/,
  list: /^( *)(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?!\1bull )\n*|\s*$)/,
  html: /^ *(?:comment *(?:\n|\s*$)|closed *(?:\n{2,}|\s*$)|closing *(?:\n{2,}|\s*$))/,
  def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +["(]([^\n]+)[")])? *(?:\n+|$)/,
  table: noop,
  paragraph: /^((?:[^\n]+\n?(?!hr|heading|lheading|blockquote|tag|def))+)\n*/,
  text: /^[^\n]+/
};

block.bullet = /(?:[*+-]|\d+\.)/;
block.item = /^( *)(bull) [^\n]*(?:\n(?!\1bull )[^\n]*)*/;
block.item = replace(block.item, 'gm')
  (/bull/g, block.bullet)
  ();

block.list = replace(block.list)
  (/bull/g, block.bullet)
  ('hr', '\\n+(?=\\1?(?:[-*_] *){3,}(?:\\n+|$))')
  ('def', '\\n+(?=' + block.def.source + ')')
  ();

block.blockquote = replace(block.blockquote)
  ('def', block.def)
  ();

block._tag = '(?!(?:'
  + 'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code'
  + '|var|samp|kbd|sub|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo'
  + '|span|br|wbr|ins|del|img)\\b)\\w+(?!:/|[^\\w\\s@]*@)\\b';

block.html = replace(block.html)
  ('comment', /<!--[\s\S]*?-->/)
  ('closed', /<(tag)[\s\S]+?<\/\1>/)
  ('closing', /<tag(?:"[^"]*"|'[^']*'|[^'">])*?>/)
  (/tag/g, block._tag)
  ();

block.paragraph = replace(block.paragraph)
  ('hr', block.hr)
  ('heading', block.heading)
  ('lheading', block.lheading)
  ('blockquote', block.blockquote)
  ('tag', '<' + block._tag)
  ('def', block.def)
  ();

/**
 * Normal Block Grammar
 */

block.normal = merge({}, block);

/**
 * GFM Block Grammar
 */

block.gfm = merge({}, block.normal, {
  fences: /^ *(`{3,}|~{3,})[ \.]*(\S+)? *\n([\s\S]*?)\s*\1 *(?:\n+|$)/,
  paragraph: /^/,
  heading: /^ *(#{1,6}) +([^\n]+?) *#* *(?:\n+|$)/
});

block.gfm.paragraph = replace(block.paragraph)
  ('(?!', '(?!'
    + block.gfm.fences.source.replace('\\1', '\\2') + '|'
    + block.list.source.replace('\\1', '\\3') + '|')
  ();

/**
 * GFM + Tables Block Grammar
 */

block.tables = merge({}, block.gfm, {
  nptable: /^ *(\S.*\|.*)\n *([-:]+ *\|[-| :]*)\n((?:.*\|.*(?:\n|$))*)\n*/,
  table: /^ *\|(.+)\n *\|( *[-:]+[-| :]*)\n((?: *\|.*(?:\n|$))*)\n*/
});

/**
 * Block Lexer
 */

function Lexer(options) {
  this.tokens = [];
  this.tokens.links = {};
  this.options = options || marked.defaults;
  this.rules = block.normal;

  if (this.options.gfm) {
    if (this.options.tables) {
      this.rules = block.tables;
    } else {
      this.rules = block.gfm;
    }
  }
}

/**
 * Expose Block Rules
 */

Lexer.rules = block;

/**
 * Static Lex Method
 */

Lexer.lex = function(src, options) {
  var lexer = new Lexer(options);
  return lexer.lex(src);
};

/**
 * Preprocessing
 */

Lexer.prototype.lex = function(src) {
  src = src
    .replace(/\r\n|\r/g, '\n')
    .replace(/\t/g, '    ')
    .replace(/\u00a0/g, ' ')
    .replace(/\u2424/g, '\n');

  return this.token(src, true);
};

/**
 * Lexing
 */

Lexer.prototype.token = function(src, top, bq) {
  var this$1 = this;

  var src = src.replace(/^ +$/gm, '')
    , next
    , loose
    , cap
    , bull
    , b
    , item
    , space
    , i
    , l;

  while (src) {
    // newline
    if (cap = this$1.rules.newline.exec(src)) {
      src = src.substring(cap[0].length);
      if (cap[0].length > 1) {
        this$1.tokens.push({
          type: 'space'
        });
      }
    }

    // code
    if (cap = this$1.rules.code.exec(src)) {
      src = src.substring(cap[0].length);
      cap = cap[0].replace(/^ {4}/gm, '');
      this$1.tokens.push({
        type: 'code',
        text: !this$1.options.pedantic
          ? cap.replace(/\n+$/, '')
          : cap
      });
      continue;
    }

    // fences (gfm)
    if (cap = this$1.rules.fences.exec(src)) {
      src = src.substring(cap[0].length);
      this$1.tokens.push({
        type: 'code',
        lang: cap[2],
        text: cap[3] || ''
      });
      continue;
    }

    // heading
    if (cap = this$1.rules.heading.exec(src)) {
      src = src.substring(cap[0].length);
      this$1.tokens.push({
        type: 'heading',
        depth: cap[1].length,
        text: cap[2]
      });
      continue;
    }

    // table no leading pipe (gfm)
    if (top && (cap = this$1.rules.nptable.exec(src))) {
      src = src.substring(cap[0].length);

      item = {
        type: 'table',
        header: cap[1].replace(/^ *| *\| *$/g, '').split(/ *\| */),
        align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
        cells: cap[3].replace(/\n$/, '').split('\n')
      };

      for (i = 0; i < item.align.length; i++) {
        if (/^ *-+: *$/.test(item.align[i])) {
          item.align[i] = 'right';
        } else if (/^ *:-+: *$/.test(item.align[i])) {
          item.align[i] = 'center';
        } else if (/^ *:-+ *$/.test(item.align[i])) {
          item.align[i] = 'left';
        } else {
          item.align[i] = null;
        }
      }

      for (i = 0; i < item.cells.length; i++) {
        item.cells[i] = item.cells[i].split(/ *\| */);
      }

      this$1.tokens.push(item);

      continue;
    }

    // lheading
    if (cap = this$1.rules.lheading.exec(src)) {
      src = src.substring(cap[0].length);
      this$1.tokens.push({
        type: 'heading',
        depth: cap[2] === '=' ? 1 : 2,
        text: cap[1]
      });
      continue;
    }

    // hr
    if (cap = this$1.rules.hr.exec(src)) {
      src = src.substring(cap[0].length);
      this$1.tokens.push({
        type: 'hr'
      });
      continue;
    }

    // blockquote
    if (cap = this$1.rules.blockquote.exec(src)) {
      src = src.substring(cap[0].length);

      this$1.tokens.push({
        type: 'blockquote_start'
      });

      cap = cap[0].replace(/^ *> ?/gm, '');

      // Pass `top` to keep the current
      // "toplevel" state. This is exactly
      // how markdown.pl works.
      this$1.token(cap, top, true);

      this$1.tokens.push({
        type: 'blockquote_end'
      });

      continue;
    }

    // list
    if (cap = this$1.rules.list.exec(src)) {
      src = src.substring(cap[0].length);
      bull = cap[2];

      this$1.tokens.push({
        type: 'list_start',
        ordered: bull.length > 1
      });

      // Get each top-level item.
      cap = cap[0].match(this$1.rules.item);

      next = false;
      l = cap.length;
      i = 0;

      for (; i < l; i++) {
        item = cap[i];

        // Remove the list item's bullet
        // so it is seen as the next token.
        space = item.length;
        item = item.replace(/^ *([*+-]|\d+\.) +/, '');

        // Outdent whatever the
        // list item contains. Hacky.
        if (~item.indexOf('\n ')) {
          space -= item.length;
          item = !this$1.options.pedantic
            ? item.replace(new RegExp('^ {1,' + space + '}', 'gm'), '')
            : item.replace(/^ {1,4}/gm, '');
        }

        // Determine whether the next list item belongs here.
        // Backpedal if it does not belong in this list.
        if (this$1.options.smartLists && i !== l - 1) {
          b = block.bullet.exec(cap[i + 1])[0];
          if (bull !== b && !(bull.length > 1 && b.length > 1)) {
            src = cap.slice(i + 1).join('\n') + src;
            i = l - 1;
          }
        }

        // Determine whether item is loose or not.
        // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
        // for discount behavior.
        loose = next || /\n\n(?!\s*$)/.test(item);
        if (i !== l - 1) {
          next = item.charAt(item.length - 1) === '\n';
          if (!loose) { loose = next; }
        }

        this$1.tokens.push({
          type: loose
            ? 'loose_item_start'
            : 'list_item_start'
        });

        // Recurse.
        this$1.token(item, false, bq);

        this$1.tokens.push({
          type: 'list_item_end'
        });
      }

      this$1.tokens.push({
        type: 'list_end'
      });

      continue;
    }

    // html
    if (cap = this$1.rules.html.exec(src)) {
      src = src.substring(cap[0].length);
      this$1.tokens.push({
        type: this$1.options.sanitize
          ? 'paragraph'
          : 'html',
        pre: !this$1.options.sanitizer
          && (cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style'),
        text: cap[0]
      });
      continue;
    }

    // def
    if ((!bq && top) && (cap = this$1.rules.def.exec(src))) {
      src = src.substring(cap[0].length);
      this$1.tokens.links[cap[1].toLowerCase()] = {
        href: cap[2],
        title: cap[3]
      };
      continue;
    }

    // table (gfm)
    if (top && (cap = this$1.rules.table.exec(src))) {
      src = src.substring(cap[0].length);

      item = {
        type: 'table',
        header: cap[1].replace(/^ *| *\| *$/g, '').split(/ *\| */),
        align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
        cells: cap[3].replace(/(?: *\| *)?\n$/, '').split('\n')
      };

      for (i = 0; i < item.align.length; i++) {
        if (/^ *-+: *$/.test(item.align[i])) {
          item.align[i] = 'right';
        } else if (/^ *:-+: *$/.test(item.align[i])) {
          item.align[i] = 'center';
        } else if (/^ *:-+ *$/.test(item.align[i])) {
          item.align[i] = 'left';
        } else {
          item.align[i] = null;
        }
      }

      for (i = 0; i < item.cells.length; i++) {
        item.cells[i] = item.cells[i]
          .replace(/^ *\| *| *\| *$/g, '')
          .split(/ *\| */);
      }

      this$1.tokens.push(item);

      continue;
    }

    // top-level paragraph
    if (top && (cap = this$1.rules.paragraph.exec(src))) {
      src = src.substring(cap[0].length);
      this$1.tokens.push({
        type: 'paragraph',
        text: cap[1].charAt(cap[1].length - 1) === '\n'
          ? cap[1].slice(0, -1)
          : cap[1]
      });
      continue;
    }

    // text
    if (cap = this$1.rules.text.exec(src)) {
      // Top-level should never reach here.
      src = src.substring(cap[0].length);
      this$1.tokens.push({
        type: 'text',
        text: cap[0]
      });
      continue;
    }

    if (src) {
      throw new
        Error('Infinite loop on byte: ' + src.charCodeAt(0));
    }
  }

  return this.tokens;
};

/**
 * Inline-Level Grammar
 */

var inline = {
  escape: /^\\([\\`*{}\[\]()#+\-.!_>])/,
  autolink: /^<([^ >]+(@|:\/)[^ >]+)>/,
  url: noop,
  tag: /^<!--[\s\S]*?-->|^<\/?\w+(?:"[^"]*"|'[^']*'|[^'">])*?>/,
  link: /^!?\[(inside)\]\(href\)/,
  reflink: /^!?\[(inside)\]\s*\[([^\]]*)\]/,
  nolink: /^!?\[((?:\[[^\]]*\]|[^\[\]])*)\]/,
  strong: /^__([\s\S]+?)__(?!_)|^\*\*([\s\S]+?)\*\*(?!\*)/,
  em: /^\b_((?:[^_]|__)+?)_\b|^\*((?:\*\*|[\s\S])+?)\*(?!\*)/,
  code: /^(`+)\s*([\s\S]*?[^`])\s*\1(?!`)/,
  br: /^ {2,}\n(?!\s*$)/,
  del: noop,
  text: /^[\s\S]+?(?=[\\<!\[_*`]| {2,}\n|$)/
};

inline._inside = /(?:\[[^\]]*\]|[^\[\]]|\](?=[^\[]*\]))*/;
inline._href = /\s*<?([\s\S]*?)>?(?:\s+['"]([\s\S]*?)['"])?\s*/;

inline.link = replace(inline.link)
  ('inside', inline._inside)
  ('href', inline._href)
  ();

inline.reflink = replace(inline.reflink)
  ('inside', inline._inside)
  ();

/**
 * Normal Inline Grammar
 */

inline.normal = merge({}, inline);

/**
 * Pedantic Inline Grammar
 */

inline.pedantic = merge({}, inline.normal, {
  strong: /^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,
  em: /^_(?=\S)([\s\S]*?\S)_(?!_)|^\*(?=\S)([\s\S]*?\S)\*(?!\*)/
});

/**
 * GFM Inline Grammar
 */

inline.gfm = merge({}, inline.normal, {
  escape: replace(inline.escape)('])', '~|])')(),
  url: /^(https?:\/\/[^\s<]+[^<.,:;"')\]\s])/,
  del: /^~~(?=\S)([\s\S]*?\S)~~/,
  text: replace(inline.text)
    (']|', '~]|')
    ('|', '|https?://|')
    ()
});

/**
 * GFM + Line Breaks Inline Grammar
 */

inline.breaks = merge({}, inline.gfm, {
  br: replace(inline.br)('{2,}', '*')(),
  text: replace(inline.gfm.text)('{2,}', '*')()
});

/**
 * Inline Lexer & Compiler
 */

function InlineLexer(links, options) {
  this.options = options || marked.defaults;
  this.links = links;
  this.rules = inline.normal;
  this.renderer = this.options.renderer || new Renderer;
  this.renderer.options = this.options;

  if (!this.links) {
    throw new
      Error('Tokens array requires a `links` property.');
  }

  if (this.options.gfm) {
    if (this.options.breaks) {
      this.rules = inline.breaks;
    } else {
      this.rules = inline.gfm;
    }
  } else if (this.options.pedantic) {
    this.rules = inline.pedantic;
  }
}

/**
 * Expose Inline Rules
 */

InlineLexer.rules = inline;

/**
 * Static Lexing/Compiling Method
 */

InlineLexer.output = function(src, links, options) {
  var inline = new InlineLexer(links, options);
  return inline.output(src);
};

/**
 * Lexing/Compiling
 */

InlineLexer.prototype.output = function(src) {
  var this$1 = this;

  var out = ''
    , link
    , text
    , href
    , cap;

  while (src) {
    // escape
    if (cap = this$1.rules.escape.exec(src)) {
      src = src.substring(cap[0].length);
      out += cap[1];
      continue;
    }

    // autolink
    if (cap = this$1.rules.autolink.exec(src)) {
      src = src.substring(cap[0].length);
      if (cap[2] === '@') {
        text = cap[1].charAt(6) === ':'
          ? this$1.mangle(cap[1].substring(7))
          : this$1.mangle(cap[1]);
        href = this$1.mangle('mailto:') + text;
      } else {
        text = escape(cap[1]);
        href = text;
      }
      out += this$1.renderer.link(href, null, text);
      continue;
    }

    // url (gfm)
    if (!this$1.inLink && (cap = this$1.rules.url.exec(src))) {
      src = src.substring(cap[0].length);
      text = escape(cap[1]);
      href = text;
      out += this$1.renderer.link(href, null, text);
      continue;
    }

    // tag
    if (cap = this$1.rules.tag.exec(src)) {
      if (!this$1.inLink && /^<a /i.test(cap[0])) {
        this$1.inLink = true;
      } else if (this$1.inLink && /^<\/a>/i.test(cap[0])) {
        this$1.inLink = false;
      }
      src = src.substring(cap[0].length);
      out += this$1.options.sanitize
        ? this$1.options.sanitizer
          ? this$1.options.sanitizer(cap[0])
          : escape(cap[0])
        : cap[0];
      continue;
    }

    // link
    if (cap = this$1.rules.link.exec(src)) {
      src = src.substring(cap[0].length);
      this$1.inLink = true;
      out += this$1.outputLink(cap, {
        href: cap[2],
        title: cap[3]
      });
      this$1.inLink = false;
      continue;
    }

    // reflink, nolink
    if ((cap = this$1.rules.reflink.exec(src))
        || (cap = this$1.rules.nolink.exec(src))) {
      src = src.substring(cap[0].length);
      link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
      link = this$1.links[link.toLowerCase()];
      if (!link || !link.href) {
        out += cap[0].charAt(0);
        src = cap[0].substring(1) + src;
        continue;
      }
      this$1.inLink = true;
      out += this$1.outputLink(cap, link);
      this$1.inLink = false;
      continue;
    }

    // strong
    if (cap = this$1.rules.strong.exec(src)) {
      src = src.substring(cap[0].length);
      out += this$1.renderer.strong(this$1.output(cap[2] || cap[1]));
      continue;
    }

    // em
    if (cap = this$1.rules.em.exec(src)) {
      src = src.substring(cap[0].length);
      out += this$1.renderer.em(this$1.output(cap[2] || cap[1]));
      continue;
    }

    // code
    if (cap = this$1.rules.code.exec(src)) {
      src = src.substring(cap[0].length);
      out += this$1.renderer.codespan(escape(cap[2], true));
      continue;
    }

    // br
    if (cap = this$1.rules.br.exec(src)) {
      src = src.substring(cap[0].length);
      out += this$1.renderer.br();
      continue;
    }

    // del (gfm)
    if (cap = this$1.rules.del.exec(src)) {
      src = src.substring(cap[0].length);
      out += this$1.renderer.del(this$1.output(cap[1]));
      continue;
    }

    // text
    if (cap = this$1.rules.text.exec(src)) {
      src = src.substring(cap[0].length);
      out += this$1.renderer.text(escape(this$1.smartypants(cap[0])));
      continue;
    }

    if (src) {
      throw new
        Error('Infinite loop on byte: ' + src.charCodeAt(0));
    }
  }

  return out;
};

/**
 * Compile Link
 */

InlineLexer.prototype.outputLink = function(cap, link) {
  var href = escape(link.href)
    , title = link.title ? escape(link.title) : null;

  return cap[0].charAt(0) !== '!'
    ? this.renderer.link(href, title, this.output(cap[1]))
    : this.renderer.image(href, title, escape(cap[1]));
};

/**
 * Smartypants Transformations
 */

InlineLexer.prototype.smartypants = function(text) {
  if (!this.options.smartypants) { return text; }
  return text
    // em-dashes
    .replace(/---/g, '\u2014')
    // en-dashes
    .replace(/--/g, '\u2013')
    // opening singles
    .replace(/(^|[-\u2014/(\[{"\s])'/g, '$1\u2018')
    // closing singles & apostrophes
    .replace(/'/g, '\u2019')
    // opening doubles
    .replace(/(^|[-\u2014/(\[{\u2018\s])"/g, '$1\u201c')
    // closing doubles
    .replace(/"/g, '\u201d')
    // ellipses
    .replace(/\.{3}/g, '\u2026');
};

/**
 * Mangle Links
 */

InlineLexer.prototype.mangle = function(text) {
  if (!this.options.mangle) { return text; }
  var out = ''
    , l = text.length
    , i = 0
    , ch;

  for (; i < l; i++) {
    ch = text.charCodeAt(i);
    if (Math.random() > 0.5) {
      ch = 'x' + ch.toString(16);
    }
    out += '&#' + ch + ';';
  }

  return out;
};

/**
 * Renderer
 */

function Renderer(options) {
  this.options = options || {};
}

Renderer.prototype.code = function(code, lang, escaped) {
  if (this.options.highlight) {
    var out = this.options.highlight(code, lang);
    if (out != null && out !== code) {
      escaped = true;
      code = out;
    }
  }

  if (!lang) {
    return '<pre><code>'
      + (escaped ? code : escape(code, true))
      + '\n</code></pre>';
  }

  return '<pre><code class="'
    + this.options.langPrefix
    + escape(lang, true)
    + '">'
    + (escaped ? code : escape(code, true))
    + '\n</code></pre>\n';
};

Renderer.prototype.blockquote = function(quote) {
  return '<blockquote>\n' + quote + '</blockquote>\n';
};

Renderer.prototype.html = function(html) {
  return html;
};

Renderer.prototype.heading = function(text, level, raw) {
  return '<h'
    + level
    + ' id="'
    + this.options.headerPrefix
    + raw.toLowerCase().replace(/[^\w]+/g, '-')
    + '">'
    + text
    + '</h'
    + level
    + '>\n';
};

Renderer.prototype.hr = function() {
  return this.options.xhtml ? '<hr/>\n' : '<hr>\n';
};

Renderer.prototype.list = function(body, ordered) {
  var type = ordered ? 'ol' : 'ul';
  return '<' + type + '>\n' + body + '</' + type + '>\n';
};

Renderer.prototype.listitem = function(text) {
  return '<li>' + text + '</li>\n';
};

Renderer.prototype.paragraph = function(text) {
  return '<p>' + text + '</p>\n';
};

Renderer.prototype.table = function(header, body) {
  return '<table>\n'
    + '<thead>\n'
    + header
    + '</thead>\n'
    + '<tbody>\n'
    + body
    + '</tbody>\n'
    + '</table>\n';
};

Renderer.prototype.tablerow = function(content) {
  return '<tr>\n' + content + '</tr>\n';
};

Renderer.prototype.tablecell = function(content, flags) {
  var type = flags.header ? 'th' : 'td';
  var tag = flags.align
    ? '<' + type + ' style="text-align:' + flags.align + '">'
    : '<' + type + '>';
  return tag + content + '</' + type + '>\n';
};

// span level renderer
Renderer.prototype.strong = function(text) {
  return '<strong>' + text + '</strong>';
};

Renderer.prototype.em = function(text) {
  return '<em>' + text + '</em>';
};

Renderer.prototype.codespan = function(text) {
  return '<code>' + text + '</code>';
};

Renderer.prototype.br = function() {
  return this.options.xhtml ? '<br/>' : '<br>';
};

Renderer.prototype.del = function(text) {
  return '<del>' + text + '</del>';
};

Renderer.prototype.link = function(href, title, text) {
  if (this.options.sanitize) {
    try {
      var prot = decodeURIComponent(unescape(href))
        .replace(/[^\w:]/g, '')
        .toLowerCase();
    } catch (e) {
      return '';
    }
    if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0) {
      return '';
    }
  }
  var out = '<a href="' + href + '"';
  if (title) {
    out += ' title="' + title + '"';
  }
  out += '>' + text + '</a>';
  return out;
};

Renderer.prototype.image = function(href, title, text) {
  var out = '<img src="' + href + '" alt="' + text + '"';
  if (title) {
    out += ' title="' + title + '"';
  }
  out += this.options.xhtml ? '/>' : '>';
  return out;
};

Renderer.prototype.text = function(text) {
  return text;
};

/**
 * Parsing & Compiling
 */

function Parser(options) {
  this.tokens = [];
  this.token = null;
  this.options = options || marked.defaults;
  this.options.renderer = this.options.renderer || new Renderer;
  this.renderer = this.options.renderer;
  this.renderer.options = this.options;
}

/**
 * Static Parse Method
 */

Parser.parse = function(src, options, renderer) {
  var parser = new Parser(options, renderer);
  return parser.parse(src);
};

/**
 * Parse Loop
 */

Parser.prototype.parse = function(src) {
  var this$1 = this;

  this.inline = new InlineLexer(src.links, this.options, this.renderer);
  this.tokens = src.reverse();

  var out = '';
  while (this.next()) {
    out += this$1.tok();
  }

  return out;
};

/**
 * Next Token
 */

Parser.prototype.next = function() {
  return this.token = this.tokens.pop();
};

/**
 * Preview Next Token
 */

Parser.prototype.peek = function() {
  return this.tokens[this.tokens.length - 1] || 0;
};

/**
 * Parse Text Tokens
 */

Parser.prototype.parseText = function() {
  var this$1 = this;

  var body = this.token.text;

  while (this.peek().type === 'text') {
    body += '\n' + this$1.next().text;
  }

  return this.inline.output(body);
};

/**
 * Parse Current Token
 */

Parser.prototype.tok = function() {
  var this$1 = this;

  switch (this.token.type) {
    case 'space': {
      return '';
    }
    case 'hr': {
      return this.renderer.hr();
    }
    case 'heading': {
      return this.renderer.heading(
        this.inline.output(this.token.text),
        this.token.depth,
        this.token.text);
    }
    case 'code': {
      return this.renderer.code(this.token.text,
        this.token.lang,
        this.token.escaped);
    }
    case 'table': {
      var header = ''
        , body = ''
        , i
        , row
        , cell
        , flags
        , j;

      // header
      cell = '';
      for (i = 0; i < this.token.header.length; i++) {
        flags = { header: true, align: this$1.token.align[i] };
        cell += this$1.renderer.tablecell(
          this$1.inline.output(this$1.token.header[i]),
          { header: true, align: this$1.token.align[i] }
        );
      }
      header += this.renderer.tablerow(cell);

      for (i = 0; i < this.token.cells.length; i++) {
        row = this$1.token.cells[i];

        cell = '';
        for (j = 0; j < row.length; j++) {
          cell += this$1.renderer.tablecell(
            this$1.inline.output(row[j]),
            { header: false, align: this$1.token.align[j] }
          );
        }

        body += this$1.renderer.tablerow(cell);
      }
      return this.renderer.table(header, body);
    }
    case 'blockquote_start': {
      var body = '';

      while (this.next().type !== 'blockquote_end') {
        body += this$1.tok();
      }

      return this.renderer.blockquote(body);
    }
    case 'list_start': {
      var body = ''
        , ordered = this.token.ordered;

      while (this.next().type !== 'list_end') {
        body += this$1.tok();
      }

      return this.renderer.list(body, ordered);
    }
    case 'list_item_start': {
      var body = '';

      while (this.next().type !== 'list_item_end') {
        body += this$1.token.type === 'text'
          ? this$1.parseText()
          : this$1.tok();
      }

      return this.renderer.listitem(body);
    }
    case 'loose_item_start': {
      var body = '';

      while (this.next().type !== 'list_item_end') {
        body += this$1.tok();
      }

      return this.renderer.listitem(body);
    }
    case 'html': {
      var html = !this.token.pre && !this.options.pedantic
        ? this.inline.output(this.token.text)
        : this.token.text;
      return this.renderer.html(html);
    }
    case 'paragraph': {
      return this.renderer.paragraph(this.inline.output(this.token.text));
    }
    case 'text': {
      return this.renderer.paragraph(this.parseText());
    }
  }
};

/**
 * Helpers
 */

function escape(html, encode) {
  return html
    .replace(!encode ? /&(?!#?\w+;)/g : /&/g, '&amp;')
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;')
    .replace(/"/g, '&quot;')
    .replace(/'/g, '&#39;');
}

function unescape(html) {
	// explicitly match decimal, hex, and named HTML entities 
  return html.replace(/&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/g, function(_, n) {
    n = n.toLowerCase();
    if (n === 'colon') { return ':'; }
    if (n.charAt(0) === '#') {
      return n.charAt(1) === 'x'
        ? String.fromCharCode(parseInt(n.substring(2), 16))
        : String.fromCharCode(+n.substring(1));
    }
    return '';
  });
}

function replace(regex, opt) {
  regex = regex.source;
  opt = opt || '';
  return function self(name, val) {
    if (!name) { return new RegExp(regex, opt); }
    val = val.source || val;
    val = val.replace(/(^|[^\[])\^/g, '$1');
    regex = regex.replace(name, val);
    return self;
  };
}

function noop() {}
noop.exec = noop;

function merge(obj) {
  var arguments$1 = arguments;

  var i = 1
    , target
    , key;

  for (; i < arguments.length; i++) {
    target = arguments$1[i];
    for (key in target) {
      if (Object.prototype.hasOwnProperty.call(target, key)) {
        obj[key] = target[key];
      }
    }
  }

  return obj;
}


/**
 * Marked
 */

function marked(src, opt, callback) {
  if (callback || typeof opt === 'function') {
    if (!callback) {
      callback = opt;
      opt = null;
    }

    opt = merge({}, marked.defaults, opt || {});

    var highlight = opt.highlight
      , tokens
      , pending
      , i = 0;

    try {
      tokens = Lexer.lex(src, opt);
    } catch (e) {
      return callback(e);
    }

    pending = tokens.length;

    var done = function(err) {
      if (err) {
        opt.highlight = highlight;
        return callback(err);
      }

      var out;

      try {
        out = Parser.parse(tokens, opt);
      } catch (e) {
        err = e;
      }

      opt.highlight = highlight;

      return err
        ? callback(err)
        : callback(null, out);
    };

    if (!highlight || highlight.length < 3) {
      return done();
    }

    delete opt.highlight;

    if (!pending) { return done(); }

    for (; i < tokens.length; i++) {
      (function(token) {
        if (token.type !== 'code') {
          return --pending || done();
        }
        return highlight(token.text, token.lang, function(err, code) {
          if (err) { return done(err); }
          if (code == null || code === token.text) {
            return --pending || done();
          }
          token.text = code;
          token.escaped = true;
          --pending || done();
        });
      })(tokens[i]);
    }

    return;
  }
  try {
    if (opt) { opt = merge({}, marked.defaults, opt); }
    return Parser.parse(Lexer.lex(src, opt), opt);
  } catch (e) {
    e.message += '\nPlease report this to https://github.com/chjj/marked.';
    if ((opt || marked.defaults).silent) {
      return '<p>An error occured:</p><pre>'
        + escape(e.message + '', true)
        + '</pre>';
    }
    throw e;
  }
}

/**
 * Options
 */

marked.options =
marked.setOptions = function(opt) {
  merge(marked.defaults, opt);
  return marked;
};

marked.defaults = {
  gfm: true,
  tables: true,
  breaks: false,
  pedantic: false,
  sanitize: false,
  sanitizer: null,
  mangle: true,
  smartLists: false,
  silent: false,
  highlight: null,
  langPrefix: 'lang-',
  smartypants: false,
  headerPrefix: '',
  renderer: new Renderer,
  xhtml: false
};

/**
 * Expose
 */

marked.Parser = Parser;
marked.parser = Parser.parse;

marked.Renderer = Renderer;

marked.Lexer = Lexer;
marked.lexer = Lexer.lex;

marked.InlineLexer = InlineLexer;
marked.inlineLexer = InlineLexer.output;

marked.parse = marked;

if ('object' !== 'undefined' && 'object' === 'object') {
  module.exports = marked;
} else if (typeof undefined === 'function' && undefined.amd) {
  undefined(function() { return marked; });
} else {
  this.marked = marked;
}

}).call(function() {
  return this || (typeof window !== 'undefined' ? window : commonjsGlobal);
}());
});

marked.setOptions({
  gfm: true,
  smartypants: true
});

var markdown = function(dom, data) {
  var markdownElements = [].slice.call(dom.querySelectorAll('[markdown]'));
  markdownElements.forEach(function (el) {
    var content = el.innerHTML;
    // Set default indents
    content = content.replace(/\n/, "");
    var tabs = content.match(/\s*/);
    content = content.replace(new RegExp("\n" + tabs, "g"), "\n");
    content = content.trim();

    el.innerHTML = marked(content);
  });
};

var prism = createCommonjsModule(function (module) {
/* **********************************************
     Begin prism-core.js
********************************************** */

var _self = (typeof window !== 'undefined')
	? window   // if in browser
	: (
		(typeof WorkerGlobalScope !== 'undefined' && self instanceof WorkerGlobalScope)
		? self // if in worker
		: {}   // if in node js
	);

/**
 * Prism: Lightweight, robust, elegant syntax highlighting
 * MIT license http://www.opensource.org/licenses/mit-license.php/
 * @author Lea Verou http://lea.verou.me
 */

var Prism = (function(){

// Private helper vars
var lang = /\blang(?:uage)?-(\w+)\b/i;
var uniqueId = 0;

var _ = _self.Prism = {
	util: {
		encode: function (tokens) {
			if (tokens instanceof Token) {
				return new Token(tokens.type, _.util.encode(tokens.content), tokens.alias);
			} else if (_.util.type(tokens) === 'Array') {
				return tokens.map(_.util.encode);
			} else {
				return tokens.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/\u00a0/g, ' ');
			}
		},

		type: function (o) {
			return Object.prototype.toString.call(o).match(/\[object (\w+)\]/)[1];
		},

		objId: function (obj) {
			if (!obj['__id']) {
				Object.defineProperty(obj, '__id', { value: ++uniqueId });
			}
			return obj['__id'];
		},

		// Deep clone a language definition (e.g. to extend it)
		clone: function (o) {
			var type = _.util.type(o);

			switch (type) {
				case 'Object':
					var clone = {};

					for (var key in o) {
						if (o.hasOwnProperty(key)) {
							clone[key] = _.util.clone(o[key]);
						}
					}

					return clone;

				case 'Array':
					// Check for existence for IE8
					return o.map && o.map(function(v) { return _.util.clone(v); });
			}

			return o;
		}
	},

	languages: {
		extend: function (id, redef) {
			var lang = _.util.clone(_.languages[id]);

			for (var key in redef) {
				lang[key] = redef[key];
			}

			return lang;
		},

		/**
		 * Insert a token before another token in a language literal
		 * As this needs to recreate the object (we cannot actually insert before keys in object literals),
		 * we cannot just provide an object, we need anobject and a key.
		 * @param inside The key (or language id) of the parent
		 * @param before The key to insert before. If not provided, the function appends instead.
		 * @param insert Object with the key/value pairs to insert
		 * @param root The object that contains `inside`. If equal to Prism.languages, it can be omitted.
		 */
		insertBefore: function (inside, before, insert, root) {
			root = root || _.languages;
			var grammar = root[inside];

			if (arguments.length == 2) {
				insert = arguments[1];

				for (var newToken in insert) {
					if (insert.hasOwnProperty(newToken)) {
						grammar[newToken] = insert[newToken];
					}
				}

				return grammar;
			}

			var ret = {};

			for (var token in grammar) {

				if (grammar.hasOwnProperty(token)) {

					if (token == before) {

						for (var newToken in insert) {

							if (insert.hasOwnProperty(newToken)) {
								ret[newToken] = insert[newToken];
							}
						}
					}

					ret[token] = grammar[token];
				}
			}

			// Update references in other language definitions
			_.languages.DFS(_.languages, function(key, value) {
				if (value === root[inside] && key != inside) {
					this[key] = ret;
				}
			});

			return root[inside] = ret;
		},

		// Traverse a language definition with Depth First Search
		DFS: function(o, callback, type, visited) {
			visited = visited || {};
			for (var i in o) {
				if (o.hasOwnProperty(i)) {
					callback.call(o, i, o[i], type || i);

					if (_.util.type(o[i]) === 'Object' && !visited[_.util.objId(o[i])]) {
						visited[_.util.objId(o[i])] = true;
						_.languages.DFS(o[i], callback, null, visited);
					}
					else if (_.util.type(o[i]) === 'Array' && !visited[_.util.objId(o[i])]) {
						visited[_.util.objId(o[i])] = true;
						_.languages.DFS(o[i], callback, i, visited);
					}
				}
			}
		}
	},
	plugins: {},

	highlightAll: function(async, callback) {
		var env = {
			callback: callback,
			selector: 'code[class*="language-"], [class*="language-"] code, code[class*="lang-"], [class*="lang-"] code'
		};

		_.hooks.run("before-highlightall", env);

		var elements = env.elements || document.querySelectorAll(env.selector);

		for (var i=0, element; element = elements[i++];) {
			_.highlightElement(element, async === true, env.callback);
		}
	},

	highlightElement: function(element, async, callback) {
		// Find language
		var language, grammar, parent = element;

		while (parent && !lang.test(parent.className)) {
			parent = parent.parentNode;
		}

		if (parent) {
			language = (parent.className.match(lang) || [,''])[1].toLowerCase();
			grammar = _.languages[language];
		}

		// Set language on the element, if not present
		element.className = element.className.replace(lang, '').replace(/\s+/g, ' ') + ' language-' + language;

		// Set language on the parent, for styling
		parent = element.parentNode;

		if (/pre/i.test(parent.nodeName)) {
			parent.className = parent.className.replace(lang, '').replace(/\s+/g, ' ') + ' language-' + language;
		}

		var code = element.textContent;

		var env = {
			element: element,
			language: language,
			grammar: grammar,
			code: code
		};

		_.hooks.run('before-sanity-check', env);

		if (!env.code || !env.grammar) {
			if (env.code) {
				env.element.textContent = env.code;
			}
			_.hooks.run('complete', env);
			return;
		}

		_.hooks.run('before-highlight', env);

		if (async && _self.Worker) {
			var worker = new Worker(_.filename);

			worker.onmessage = function(evt) {
				env.highlightedCode = evt.data;

				_.hooks.run('before-insert', env);

				env.element.innerHTML = env.highlightedCode;

				callback && callback.call(env.element);
				_.hooks.run('after-highlight', env);
				_.hooks.run('complete', env);
			};

			worker.postMessage(JSON.stringify({
				language: env.language,
				code: env.code,
				immediateClose: true
			}));
		}
		else {
			env.highlightedCode = _.highlight(env.code, env.grammar, env.language);

			_.hooks.run('before-insert', env);

			env.element.innerHTML = env.highlightedCode;

			callback && callback.call(element);

			_.hooks.run('after-highlight', env);
			_.hooks.run('complete', env);
		}
	},

	highlight: function (text, grammar, language) {
		var tokens = _.tokenize(text, grammar);
		return Token.stringify(_.util.encode(tokens), language);
	},

	tokenize: function(text, grammar, language) {
		var Token = _.Token;

		var strarr = [text];

		var rest = grammar.rest;

		if (rest) {
			for (var token in rest) {
				grammar[token] = rest[token];
			}

			delete grammar.rest;
		}

		tokenloop: for (var token in grammar) {
			if(!grammar.hasOwnProperty(token) || !grammar[token]) {
				continue;
			}

			var patterns = grammar[token];
			patterns = (_.util.type(patterns) === "Array") ? patterns : [patterns];

			for (var j = 0; j < patterns.length; ++j) {
				var pattern = patterns[j],
					inside = pattern.inside,
					lookbehind = !!pattern.lookbehind,
					greedy = !!pattern.greedy,
					lookbehindLength = 0,
					alias = pattern.alias;

				if (greedy && !pattern.pattern.global) {
					// Without the global flag, lastIndex won't work
					var flags = pattern.pattern.toString().match(/[imuy]*$/)[0];
					pattern.pattern = RegExp(pattern.pattern.source, flags + "g");
				}

				pattern = pattern.pattern || pattern;

				// Don’t cache length as it changes during the loop
				for (var i=0, pos = 0; i<strarr.length; pos += strarr[i].length, ++i) {

					var str = strarr[i];

					if (strarr.length > text.length) {
						// Something went terribly wrong, ABORT, ABORT!
						break tokenloop;
					}

					if (str instanceof Token) {
						continue;
					}

					pattern.lastIndex = 0;

					var match = pattern.exec(str),
					    delNum = 1;

					// Greedy patterns can override/remove up to two previously matched tokens
					if (!match && greedy && i != strarr.length - 1) {
						pattern.lastIndex = pos;
						match = pattern.exec(text);
						if (!match) {
							break;
						}

						var from = match.index + (lookbehind ? match[1].length : 0),
						    to = match.index + match[0].length,
						    k = i,
						    p = pos;

						for (var len = strarr.length; k < len && p < to; ++k) {
							p += strarr[k].length;
							// Move the index i to the element in strarr that is closest to from
							if (from >= p) {
								++i;
								pos = p;
							}
						}

						/*
						 * If strarr[i] is a Token, then the match starts inside another Token, which is invalid
						 * If strarr[k - 1] is greedy we are in conflict with another greedy pattern
						 */
						if (strarr[i] instanceof Token || strarr[k - 1].greedy) {
							continue;
						}

						// Number of tokens to delete and replace with the new match
						delNum = k - i;
						str = text.slice(pos, p);
						match.index -= pos;
					}

					if (!match) {
						continue;
					}

					if(lookbehind) {
						lookbehindLength = match[1].length;
					}

					var from = match.index + lookbehindLength,
					    match = match[0].slice(lookbehindLength),
					    to = from + match.length,
					    before = str.slice(0, from),
					    after = str.slice(to);

					var args = [i, delNum];

					if (before) {
						args.push(before);
					}

					var wrapped = new Token(token, inside? _.tokenize(match, inside) : match, alias, match, greedy);

					args.push(wrapped);

					if (after) {
						args.push(after);
					}

					Array.prototype.splice.apply(strarr, args);
				}
			}
		}

		return strarr;
	},

	hooks: {
		all: {},

		add: function (name, callback) {
			var hooks = _.hooks.all;

			hooks[name] = hooks[name] || [];

			hooks[name].push(callback);
		},

		run: function (name, env) {
			var callbacks = _.hooks.all[name];

			if (!callbacks || !callbacks.length) {
				return;
			}

			for (var i=0, callback; callback = callbacks[i++];) {
				callback(env);
			}
		}
	}
};

var Token = _.Token = function(type, content, alias, matchedStr, greedy) {
	this.type = type;
	this.content = content;
	this.alias = alias;
	// Copy of the full string this token was created from
	this.length = (matchedStr || "").length|0;
	this.greedy = !!greedy;
};

Token.stringify = function(o, language, parent) {
	if (typeof o == 'string') {
		return o;
	}

	if (_.util.type(o) === 'Array') {
		return o.map(function(element) {
			return Token.stringify(element, language, o);
		}).join('');
	}

	var env = {
		type: o.type,
		content: Token.stringify(o.content, language, parent),
		tag: 'span',
		classes: ['token', o.type],
		attributes: {},
		language: language,
		parent: parent
	};

	if (env.type == 'comment') {
		env.attributes['spellcheck'] = 'true';
	}

	if (o.alias) {
		var aliases = _.util.type(o.alias) === 'Array' ? o.alias : [o.alias];
		Array.prototype.push.apply(env.classes, aliases);
	}

	_.hooks.run('wrap', env);

	var attributes = Object.keys(env.attributes).map(function(name) {
		return name + '="' + (env.attributes[name] || '').replace(/"/g, '&quot;') + '"';
	}).join(' ');

	return '<' + env.tag + ' class="' + env.classes.join(' ') + '"' + (attributes ? ' ' + attributes : '') + '>' + env.content + '</' + env.tag + '>';

};

if (!_self.document) {
	if (!_self.addEventListener) {
		// in Node.js
		return _self.Prism;
	}
 	// In worker
	_self.addEventListener('message', function(evt) {
		var message = JSON.parse(evt.data),
		    lang = message.language,
		    code = message.code,
		    immediateClose = message.immediateClose;

		_self.postMessage(_.highlight(code, _.languages[lang], lang));
		if (immediateClose) {
			_self.close();
		}
	}, false);

	return _self.Prism;
}

//Get current script and highlight
var script = document.currentScript || [].slice.call(document.getElementsByTagName("script")).pop();

if (script) {
	_.filename = script.src;

	if (document.addEventListener && !script.hasAttribute('data-manual')) {
		if(document.readyState !== "loading") {
			if (window.requestAnimationFrame) {
				window.requestAnimationFrame(_.highlightAll);
			} else {
				window.setTimeout(_.highlightAll, 16);
			}
		}
		else {
			document.addEventListener('DOMContentLoaded', _.highlightAll);
		}
	}
}

return _self.Prism;

})();

if ('object' !== 'undefined' && module.exports) {
	module.exports = Prism;
}

// hack for components to work correctly in node.js
if (typeof commonjsGlobal !== 'undefined') {
	commonjsGlobal.Prism = Prism;
}


/* **********************************************
     Begin prism-markup.js
********************************************** */

Prism.languages.markup = {
	'comment': /<!--[\w\W]*?-->/,
	'prolog': /<\?[\w\W]+?\?>/,
	'doctype': /<!DOCTYPE[\w\W]+?>/i,
	'cdata': /<!\[CDATA\[[\w\W]*?]]>/i,
	'tag': {
		pattern: /<\/?(?!\d)[^\s>\/=$<]+(?:\s+[^\s>\/=]+(?:=(?:("|')(?:\\\1|\\?(?!\1)[\w\W])*\1|[^\s'">=]+))?)*\s*\/?>/i,
		inside: {
			'tag': {
				pattern: /^<\/?[^\s>\/]+/i,
				inside: {
					'punctuation': /^<\/?/,
					'namespace': /^[^\s>\/:]+:/
				}
			},
			'attr-value': {
				pattern: /=(?:('|")[\w\W]*?(\1)|[^\s>]+)/i,
				inside: {
					'punctuation': /[=>"']/
				}
			},
			'punctuation': /\/?>/,
			'attr-name': {
				pattern: /[^\s>\/]+/,
				inside: {
					'namespace': /^[^\s>\/:]+:/
				}
			}

		}
	},
	'entity': /&#?[\da-z]{1,8};/i
};

// Plugin to make entity title show the real entity, idea by Roman Komarov
Prism.hooks.add('wrap', function(env) {

	if (env.type === 'entity') {
		env.attributes['title'] = env.content.replace(/&amp;/, '&');
	}
});

Prism.languages.xml = Prism.languages.markup;
Prism.languages.html = Prism.languages.markup;
Prism.languages.mathml = Prism.languages.markup;
Prism.languages.svg = Prism.languages.markup;


/* **********************************************
     Begin prism-css.js
********************************************** */

Prism.languages.css = {
	'comment': /\/\*[\w\W]*?\*\//,
	'atrule': {
		pattern: /@[\w-]+?.*?(;|(?=\s*\{))/i,
		inside: {
			'rule': /@[\w-]+/
			// See rest below
		}
	},
	'url': /url\((?:(["'])(\\(?:\r\n|[\w\W])|(?!\1)[^\\\r\n])*\1|.*?)\)/i,
	'selector': /[^\{\}\s][^\{\};]*?(?=\s*\{)/,
	'string': {
		pattern: /("|')(\\(?:\r\n|[\w\W])|(?!\1)[^\\\r\n])*\1/,
		greedy: true
	},
	'property': /(\b|\B)[\w-]+(?=\s*:)/i,
	'important': /\B!important\b/i,
	'function': /[-a-z0-9]+(?=\()/i,
	'punctuation': /[(){};:]/
};

Prism.languages.css['atrule'].inside.rest = Prism.util.clone(Prism.languages.css);

if (Prism.languages.markup) {
	Prism.languages.insertBefore('markup', 'tag', {
		'style': {
			pattern: /(<style[\w\W]*?>)[\w\W]*?(?=<\/style>)/i,
			lookbehind: true,
			inside: Prism.languages.css,
			alias: 'language-css'
		}
	});
	
	Prism.languages.insertBefore('inside', 'attr-value', {
		'style-attr': {
			pattern: /\s*style=("|').*?\1/i,
			inside: {
				'attr-name': {
					pattern: /^\s*style/i,
					inside: Prism.languages.markup.tag.inside
				},
				'punctuation': /^\s*=\s*['"]|['"]\s*$/,
				'attr-value': {
					pattern: /.+/i,
					inside: Prism.languages.css
				}
			},
			alias: 'language-css'
		}
	}, Prism.languages.markup.tag);
}

/* **********************************************
     Begin prism-clike.js
********************************************** */

Prism.languages.clike = {
	'comment': [
		{
			pattern: /(^|[^\\])\/\*[\w\W]*?\*\//,
			lookbehind: true
		},
		{
			pattern: /(^|[^\\:])\/\/.*/,
			lookbehind: true
		}
	],
	'string': {
		pattern: /(["'])(\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/,
		greedy: true
	},
	'class-name': {
		pattern: /((?:\b(?:class|interface|extends|implements|trait|instanceof|new)\s+)|(?:catch\s+\())[a-z0-9_\.\\]+/i,
		lookbehind: true,
		inside: {
			punctuation: /(\.|\\)/
		}
	},
	'keyword': /\b(if|else|while|do|for|return|in|instanceof|function|new|try|throw|catch|finally|null|break|continue)\b/,
	'boolean': /\b(true|false)\b/,
	'function': /[a-z0-9_]+(?=\()/i,
	'number': /\b-?(?:0x[\da-f]+|\d*\.?\d+(?:e[+-]?\d+)?)\b/i,
	'operator': /--?|\+\+?|!=?=?|<=?|>=?|==?=?|&&?|\|\|?|\?|\*|\/|~|\^|%/,
	'punctuation': /[{}[\];(),.:]/
};


/* **********************************************
     Begin prism-javascript.js
********************************************** */

Prism.languages.javascript = Prism.languages.extend('clike', {
	'keyword': /\b(as|async|await|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|finally|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|try|typeof|var|void|while|with|yield)\b/,
	'number': /\b-?(0x[\dA-Fa-f]+|0b[01]+|0o[0-7]+|\d*\.?\d+([Ee][+-]?\d+)?|NaN|Infinity)\b/,
	// Allow for all non-ASCII characters (See http://stackoverflow.com/a/2008444)
	'function': /[_$a-zA-Z\xA0-\uFFFF][_$a-zA-Z0-9\xA0-\uFFFF]*(?=\()/i,
	'operator': /--?|\+\+?|!=?=?|<=?|>=?|==?=?|&&?|\|\|?|\?|\*\*?|\/|~|\^|%|\.{3}/
});

Prism.languages.insertBefore('javascript', 'keyword', {
	'regex': {
		pattern: /(^|[^/])\/(?!\/)(\[.+?]|\\.|[^/\\\r\n])+\/[gimyu]{0,5}(?=\s*($|[\r\n,.;})]))/,
		lookbehind: true,
		greedy: true
	}
});

Prism.languages.insertBefore('javascript', 'string', {
	'template-string': {
		pattern: /`(?:\\\\|\\?[^\\])*?`/,
		greedy: true,
		inside: {
			'interpolation': {
				pattern: /\$\{[^}]+\}/,
				inside: {
					'interpolation-punctuation': {
						pattern: /^\$\{|\}$/,
						alias: 'punctuation'
					},
					rest: Prism.languages.javascript
				}
			},
			'string': /[\s\S]+/
		}
	}
});

if (Prism.languages.markup) {
	Prism.languages.insertBefore('markup', 'tag', {
		'script': {
			pattern: /(<script[\w\W]*?>)[\w\W]*?(?=<\/script>)/i,
			lookbehind: true,
			inside: Prism.languages.javascript,
			alias: 'language-javascript'
		}
	});
}

Prism.languages.js = Prism.languages.javascript;

/* **********************************************
     Begin prism-file-highlight.js
********************************************** */

(function () {
	if (typeof self === 'undefined' || !self.Prism || !self.document || !document.querySelector) {
		return;
	}

	self.Prism.fileHighlight = function() {

		var Extensions = {
			'js': 'javascript',
			'py': 'python',
			'rb': 'ruby',
			'ps1': 'powershell',
			'psm1': 'powershell',
			'sh': 'bash',
			'bat': 'batch',
			'h': 'c',
			'tex': 'latex'
		};

		if(Array.prototype.forEach) { // Check to prevent error in IE8
			Array.prototype.slice.call(document.querySelectorAll('pre[data-src]')).forEach(function (pre) {
				var src = pre.getAttribute('data-src');

				var language, parent = pre;
				var lang = /\blang(?:uage)?-(?!\*)(\w+)\b/i;
				while (parent && !lang.test(parent.className)) {
					parent = parent.parentNode;
				}

				if (parent) {
					language = (pre.className.match(lang) || [, ''])[1];
				}

				if (!language) {
					var extension = (src.match(/\.(\w+)$/) || [, ''])[1];
					language = Extensions[extension] || extension;
				}

				var code = document.createElement('code');
				code.className = 'language-' + language;

				pre.textContent = '';

				code.textContent = 'Loading…';

				pre.appendChild(code);

				var xhr = new XMLHttpRequest();

				xhr.open('GET', src, true);

				xhr.onreadystatechange = function () {
					if (xhr.readyState == 4) {

						if (xhr.status < 400 && xhr.responseText) {
							code.textContent = xhr.responseText;

							Prism.highlightElement(code);
						}
						else if (xhr.status >= 400) {
							code.textContent = '✖ Error ' + xhr.status + ' while fetching file: ' + xhr.statusText;
						}
						else {
							code.textContent = '✖ Error: File does not exist or is empty';
						}
					}
				};

				xhr.send(null);
			});
		}

	};

	document.addEventListener('DOMContentLoaded', self.Prism.fileHighlight);

})();
});

var code$1 = function(dom, data) {
  var codeElements = [].slice.call(dom.querySelectorAll("dt-code"));
  codeElements.forEach(function (el) {
    var content = el.textContent;
    el.innerHTML = "";
    var language = el.getAttribute("language");
    var c = dom.createElement("code");
    if (el.getAttribute("block") === "") {
      // Let's normalize the tab indents
      content = content.replace(/\n/, "");
      var tabs = content.match(/\s*/);
      content = content.replace(new RegExp("\n" + tabs, "g"), "\n");
      content = content.trim();
      var p = dom.createElement("pre");
      p.appendChild(c);
      el.appendChild(p);
    } else {
      el.appendChild(c);
    }
    var highlighted = content;
    if (prism.languages[language]) {
      c.setAttribute("class", "language-" + language);
      highlighted = prism.highlight(content, prism.languages[language]);
    }
    c.innerHTML = highlighted;
  });
};

var typeset = function(dom, data) {

  var textNodes = dom.createTreeWalker(
    dom.body,
    dom.defaultView.NodeFilter.SHOW_TEXT
  );
  while (textNodes.nextNode()) {
    var n = textNodes.currentNode,
        text = n.nodeValue;
    if (text && acceptNode(n)) {
      text = quotes(text);
      text = punctuation(text);
      text = ligatures(text);
      n.nodeValue = text;
    }
  }
};

function acceptNode(node) {
  var parent = node.parentElement;
  var isMath = (parent && parent.getAttribute && parent.getAttribute("class")) ? parent.getAttribute("class").includes("katex") || parent.getAttribute("class").includes("MathJax") : false;
  return parent &&
         parent.nodeName !== "SCRIPT" &&
         parent.nodeName !== "STYLE" &&
         parent.nodeName !== "CODE" &&
         parent.nodeName !== "PRE" &&
         parent.nodeName !== "SPAN" &&
         parent.nodeName !== "DT-HEADER" &&
         parent.nodeName !== "DT-BYLINE" &&
         parent.nodeName !== "DT-MATH" &&
         parent.nodeName !== "DT-CODE" &&
         parent.nodeName !== "DT-BIBLIOGRAPHY" &&
         parent.nodeName !== "DT-FOOTER" &&
         parent.nodeType !== 8 && //comment nodes
         !isMath;
}


/*!
 * typeset - Typesetting for the web
 * @version v0.1.6
 * @link https://github.com/davidmerfield/Typeset.js
 * @author David Merfield
 */
 // which has a CC0 license
 // http://creativecommons.org/publicdomain/zero/1.0/


function punctuation(text){

  // Dashes
  text = text.replace(/--/g, '\u2014');
  text = text.replace(/ \u2014 /g,"\u2009\u2014\u2009"); //this has thin spaces

  // Elipses
  text = text.replace(/\.\.\./g,'…');

  // Nbsp for punc with spaces
  var NBSP = "\u00a0";
  var NBSP_PUNCTUATION_START = /([«¿¡]) /g;
  var NBSP_PUNCTUATION_END = / ([\!\?:;\.,‽»])/g;

  text = text.replace(NBSP_PUNCTUATION_START, '$1' + NBSP);
  text = text.replace(NBSP_PUNCTUATION_END, NBSP + '$1');

  return text;
}

function quotes(text) {

  text = text
    .replace(/(\W|^)"([^\s\!\?:;\.,‽»])/g, '$1\u201c$2') // beginning "
    .replace(/(\u201c[^"]*)"([^"]*$|[^\u201c"]*\u201c)/g, '$1\u201d$2') // ending "
    .replace(/([^0-9])"/g,'$1\u201d') // remaining " at end of word
    .replace(/(\W|^)'(\S)/g, '$1\u2018$2') // beginning '
    .replace(/([a-z])'([a-z])/ig, '$1\u2019$2') // conjunction's possession
    .replace(/((\u2018[^']*)|[a-z])'([^0-9]|$)/ig, '$1\u2019$3') // ending '
    .replace(/(\u2018)([0-9]{2}[^\u2019]*)(\u2018([^0-9]|$)|$|\u2019[a-z])/ig, '\u2019$2$3') // abbrev. years like '93
    .replace(/(\B|^)\u2018(?=([^\u2019]*\u2019\b)*([^\u2019\u2018]*\W[\u2019\u2018]\b|[^\u2019\u2018]*$))/ig, '$1\u2019') // backwards apostrophe
    .replace(/'''/g, '\u2034') // triple prime
    .replace(/("|'')/g, '\u2033') // double prime
    .replace(/'/g, '\u2032');

  // Allow escaped quotes
  text = text.replace(/\\“/, '\"');
  text = text.replace(/\\”/, '\"');
  text = text.replace(/\\’/, '\'');
  text = text.replace(/\\‘/, '\'');

  return text;
}

function ligatures(text){

    text = text.replace(/fi/g, 'fi');
    text = text.replace(/fl/g, 'fl');

    return text;
}

var code$2 = "// DistillHoverBox\n//=====================================\n\nfunction DistillHoverBox(key, pos){\n\n  if (!(key in DistillHoverBox.contentMap)){\n    console.error(\"No DistillHoverBox content registered for key\", key);\n  }\n  if (key in DistillHoverBox.liveBoxes) {\n    console.error(\"There already exists a DistillHoverBox for key\", key);\n  } else {\n    for (var k in DistillHoverBox.liveBoxes)\n      DistillHoverBox.liveBoxes[k].remove();\n    DistillHoverBox.liveBoxes[key] = this;\n  }\n  this.key = key;\n\n  var pretty = window.innerWidth > 600;\n\n  var padding = pretty? 18 : 12;\n  var outer_padding = pretty ? 18 : 0;\n  var bbox = document.querySelector(\"body\").getBoundingClientRect();\n  var left = pos[0] - bbox.left, top = pos[1] - bbox.top;\n  var width = Math.min(window.innerWidth-2*outer_padding, 648);\n  left = Math.min(left, window.innerWidth-width-outer_padding);\n  width = width - 2*padding;\n\n  var str = `<div style=\"position: absolute;\n                          background-color: #FFF;\n                          white-s\n                          opacity: 0.95;\n                          max-width: ${width}px;\n                          top: ${top}px;\n                          left: ${left}px;\n                          border: 1px solid rgba(0, 0, 0, 0.25);\n                          padding: ${padding}px;\n                          border-radius: ${pretty? 3 : 0}px;\n                          box-shadow: 0px 2px 10px 2px rgba(0, 0, 0, 0.2);\n                          z-index: ${1e6}\" >\n              ${DistillHoverBox.contentMap[key]}\n              </div>`;\n\n  this.div = appendBody(str);\n\n  DistillHoverBox.bind (this.div, key);\n}\n\nDistillHoverBox.prototype.remove = function remove(){\n  if (this.div) this.div.remove();\n  if (this.timeout) clearTimeout(this.timeout);\n  delete DistillHoverBox.liveBoxes[this.key];\n}\n\nDistillHoverBox.prototype.stopTimeout = function stopTimeout() {\n  if (this.timeout) clearTimeout(this.timeout);\n}\n\nDistillHoverBox.prototype.extendTimeout = function extendTimeout(T) {\n  //console.log(\"extend\", T)\n  var this_ = this;\n  this.stopTimeout();\n  this.timeout = setTimeout(() => this_.remove(), T);\n}\n\nDistillHoverBox.liveBoxes = {};\nDistillHoverBox.contentMap = {};\n\nDistillHoverBox.bind = function bind(node, key) {\n  if (typeof node == \"string\"){\n    node = document.querySelector(node);\n  }\n  node.addEventListener(\"mouseover\", () => {\n    var bbox = node.getBoundingClientRect();\n    if (!(key in DistillHoverBox.liveBoxes)){\n      new DistillHoverBox(key, [bbox.right, bbox.bottom]);\n    }\n    DistillHoverBox.liveBoxes[key].stopTimeout();\n  });\n  node.addEventListener(\"mouseout\", () => {\n    if (key in DistillHoverBox.liveBoxes){\n      DistillHoverBox.liveBoxes[key].extendTimeout(250);\n    }\n  });\n\n}\n\n\nfunction appendBody(str){\n  var node = nodeFromString(str);\n  var body = document.querySelector(\"body\");\n  body.appendChild(node);\n  return node;\n}\n\nfunction nodeFromString(str) {\n  var div = document.createElement(\"div\");\n  div.innerHTML = str;\n  return div.firstChild;\n}\n\nvar hover_es = document.querySelectorAll(\"span[data-hover]\");\nhover_es = [].slice.apply(hover_es);\nhover_es.forEach((e,n) => {\n  var key = \"hover-\"+n;\n  var content = e.getAttribute(\"data-hover\");\n  DistillHoverBox.contentMap[key] = content;\n  DistillHoverBox.bind(e, key);\n});\n";

var hoverBox = function(dom) {
  var s = dom.createElement("script");
  s.textContent = code$2;
  dom.querySelector("body").appendChild(s);
};

//import xml from "xml";

var generateCrossref = function(data) {


  var date = data.publishedDate;

  var batch_timestamp = Math.floor(Date.now() / 1000);
  var batch_id = data.authors.length ? data.authors[0].lastName.toLowerCase().slice(0,20) : "Anonymous";
      batch_id += "_" + date.getFullYear();
      batch_id += "_" + data.title.split(" ")[0].toLowerCase().slice(0,20) + "_" +  batch_timestamp;
  // generate XML
  var crf_data =
    {doi_batch : [

      { _attr: {
        version: "4.3.7",
        xmlns: "http://www.crossref.org/schema/4.3.7",
        "xmlns:xsi": "http://www.w3.org/2001/XMLSchema-instance",
        "xsi:schemaLocation": "http://www.crossref.org/schema/4.3.7 http://www.crossref.org/schemas/crossref4.3.7.xsd",
      }},

      { head: [
        {doi_batch_id: batch_id},
        {timestamp: batch_timestamp},
        {depositor: [
          {depositor_name: data.journal.publisherName},
          {email_address: data.journal.publisherEmail} ]},
        {registrant: data.journal.publisherName} ]},

      {body: [
        {journal: [

          {journal_metadata: [
            {full_title: data.journal.full_title || data.journal.title},
            {abbrev_title: data.journal.abbrev_title || data.journal.title || data.journal.full_title},
            {doi_data: [
              {doi: data.journal.doi},
              {resource: data.journal.url} ]} ]},

          {journal_issue: [
            {publication_date: [
              {month: date.getMonth()+1},
              {year: date.getFullYear()} ]},
            {journal_volume: [
              {volume: data.volume} ]},
            {issue: data.issue} ]},

          {journal_article: [
            {titles: [
              {title: data.title} ]},
            { contributors:
              data.authors.map(function (author, ind) { return (
                {person_name: [
                  { _attr: {
                    contributor_role: "author",
                    sequence: (ind == 0)? "first" : "additional"
                  }},
                  {given_name: author.firstName},
                  {surname: author.lastName},
                  {affiliation: author.affiliation}
                  // TODO: ORCID?
                ]}
              ); })
            },
            {publication_date: [
                {month: date.getMonth()+1},
                {day: date.getDate()},
                {year: date.getFullYear()}
            ]},
            { publisher_item: [
              {item_number: data.doi}
            ]},
            {doi_data: [
              {doi: data.doi},
              //{timestamp: ""},
              {resource: data.url} ]},
            {citation_list:
              data.citations.map(function (key) { return citation_xml(key, data.bibliography[key]); })
            }

          ]} ]} ]} ]};

  return xml(crf_data);
};

function citation_xml(key, ent){
  if (ent == undefined) { return {}; }
  var info = [];
  info.push({_attr: {key: key}});
  if ("title" in ent)
    { info.push({article_title: ent.title}); }
  if ("author" in ent)
    { info.push({author: ent.author.split(" and ")[0].split(",")[0].trim()}); }
  if ("journal" in ent)
    { info.push({journal_title: ent.journal}); }
  if ("booktitle" in ent)
    { info.push({volume_title: ent.booktitle}); }
  if ("volume" in ent)
    { info.push({volume: ent.volume}); }
  if ("issue" in ent)
    { info.push({issue: ent.issue}); }
  if ("doi" in ent)
    { info.push({doi: ent.doi}); }
  return {citation: info}
}

function xml(obj) {
  //console.log(typeof(obj), obj)
  if (typeof obj === 'string') { return obj; }
  if (typeof obj === 'number') { return ""+obj; }
  var keys = Object.keys(obj);
  if (keys.length != 1) { console.error("can't interpret ", obj, "as xml"); }
  var name = keys[0];
  var full_content = obj[name];
  var attr = {};
  if (Array.isArray(full_content)){
    var content = [];
    for (var i in  full_content) {
      var obj = full_content[i];
      var obj_name = Object.keys(obj)[0];
      if ("_attr" == obj_name) {
        attr = obj["_attr"];
      } else {
        //console.log(Object.keys(obj)[0])
        content.push(obj);
      }
    }
  } else {
    content = full_content;
  }
  if (content == undefined){
    content = "undefined";
  }

  var attr_string = "";
  for (var k in attr) {
    attr_string += " " + k + "=\"" + (attr[k]) + "\"";
  }

  //console.log(typeof content, Array.isArray(content), content instanceof String, content)
  if (Array.isArray(content)){
    content = content.map(xml);
    content = content.join("\n").split("\n");
    content = content.map(function (s) { return "  " + s; }).join("\n");
    var result = "<" + name + attr_string + ">\n" + content + "\n</" + name + ">";
  } else {
    content = xml(content);
    var result = "<" + name + attr_string + ">" + content + "</" + name + ">";
  }
  return result;
}

function renderImmediately(dom) {
  html(dom);
  styles(dom);
}

function renderOnLoad(dom, data) {
  frontMatter(dom, data);
  bibliography(dom, data);
  expandData(dom, data);
  meta(dom, data);
  header(dom, data);
  byline(dom, data);
  appendix(dom, data);
  footer(dom, data);
  markdown(dom, data);
  code$1(dom, data);
  citation(dom, data);
  footnote(dom, data);
  typeset(dom, data);
  hoverBox(dom, data);
}

// If we are in a browser, render automatically...
if(window && window.document) {
  var data = {};
  renderImmediately(window.document);
  window.document.addEventListener("DOMContentLoaded", function (event) {
    renderOnLoad(window.document, data);
    // Add a banner if we're not on localhost.
    if (window.location.hostname !== "localhost" && window.location.origin !== "file://") {
      banner(window.document, data);
    }
    generateCrossref(data);
  });
}

// If we are in node...
function render$1(dom, data) {
  renderImmediately(dom);
  renderOnLoad(dom, data);
  // Remove script tag so it doesn't run again in the client
  var s = dom.querySelector('script[src="http://distill.pub/template.js"]');
  if (s) { s.parentElement.removeChild(s); }
}

exports.render = render$1;
exports.generateCrossref = generateCrossref;

Object.defineProperty(exports, '__esModule', { value: true });

})));
//# sourceMappingURL=template.js.map