marked/lib/marked.js

/**
 * marked - a markdown parser
 * Copyright (c) 2011-2021, Christopher Jeffrey. (MIT Licensed)
 * https://github.com/markedjs/marked
 */

/**
 * DO NOT EDIT THIS FILE
 * The code in this file is generated from files in ./src/
 */

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

  function _defineProperties(target, props) {
    for (var i = 0; i < props.length; i++) {
      var descriptor = props[i];
      descriptor.enumerable = descriptor.enumerable || false;
      descriptor.configurable = true;
      if ("value" in descriptor) descriptor.writable = true;
      Object.defineProperty(target, descriptor.key, descriptor);
    }
  }

  function _createClass(Constructor, protoProps, staticProps) {
    if (protoProps) _defineProperties(Constructor.prototype, protoProps);
    if (staticProps) _defineProperties(Constructor, staticProps);
    return Constructor;
  }

  function _unsupportedIterableToArray(o, minLen) {
    if (!o) return;
    if (typeof o === "string") return _arrayLikeToArray(o, minLen);
    var n = Object.prototype.toString.call(o).slice(8, -1);
    if (n === "Object" && o.constructor) n = o.constructor.name;
    if (n === "Map" || n === "Set") return Array.from(o);
    if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
  }

  function _arrayLikeToArray(arr, len) {
    if (len == null || len > arr.length) len = arr.length;

    for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];

    return arr2;
  }

  function _createForOfIteratorHelperLoose(o, allowArrayLike) {
    var it;

    if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) {
      if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") {
        if (it) o = it;
        var i = 0;
        return function () {
          if (i >= o.length) return {
            done: true
          };
          return {
            done: false,
            value: o[i++]
          };
        };
      }

      throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
    }

    it = o[Symbol.iterator]();
    return it.next.bind(it);
  }

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

  var defaults = createCommonjsModule(function (module) {
    function getDefaults() {
      return {
        baseUrl: null,
        breaks: false,
        gfm: true,
        headerIds: true,
        headerPrefix: '',
        highlight: null,
        langPrefix: 'language-',
        mangle: true,
        pedantic: false,
        renderer: null,
        sanitize: false,
        sanitizer: null,
        silent: false,
        smartLists: false,
        smartypants: false,
        tokenizer: null,
        walkTokens: null,
        xhtml: false
      };
    }

    function changeDefaults(newDefaults) {
      module.exports.defaults = newDefaults;
    }

    module.exports = {
      defaults: getDefaults(),
      getDefaults: getDefaults,
      changeDefaults: changeDefaults
    };
  });

  /**
   * Helpers
   */
  var escapeTest = /[&<>"']/;
  var escapeReplace = /[&<>"']/g;
  var escapeTestNoEncode = /[<>"']|&(?!#?\w+;)/;
  var escapeReplaceNoEncode = /[<>"']|&(?!#?\w+;)/g;
  var escapeReplacements = {
    '&': '&amp;',
    '<': '&lt;',
    '>': '&gt;',
    '"': '&quot;',
    "'": '&#39;'
  };

  var getEscapeReplacement = function getEscapeReplacement(ch) {
    return escapeReplacements[ch];
  };

  function escape(html, encode) {
    if (encode) {
      if (escapeTest.test(html)) {
        return html.replace(escapeReplace, getEscapeReplacement);
      }
    } else {
      if (escapeTestNoEncode.test(html)) {
        return html.replace(escapeReplaceNoEncode, getEscapeReplacement);
      }
    }

    return html;
  }

  var unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;

  function unescape(html) {
    // explicitly match decimal, hex, and named HTML entities
    return html.replace(unescapeTest, 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 '';
    });
  }

  var caret = /(^|[^\[])\^/g;

  function edit(regex, opt) {
    regex = regex.source || regex;
    opt = opt || '';
    var obj = {
      replace: function replace(name, val) {
        val = val.source || val;
        val = val.replace(caret, '$1');
        regex = regex.replace(name, val);
        return obj;
      },
      getRegex: function getRegex() {
        return new RegExp(regex, opt);
      }
    };
    return obj;
  }

  var nonWordAndColonTest = /[^\w:]/g;
  var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;

  function cleanUrl(sanitize, base, href) {
    if (sanitize) {
      var prot;

      try {
        prot = decodeURIComponent(unescape(href)).replace(nonWordAndColonTest, '').toLowerCase();
      } catch (e) {
        return null;
      }

      if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
        return null;
      }
    }

    if (base && !originIndependentUrl.test(href)) {
      href = resolveUrl(base, href);
    }

    try {
      href = encodeURI(href).replace(/%25/g, '%');
    } catch (e) {
      return null;
    }

    return href;
  }

  var baseUrls = {};
  var justDomain = /^[^:]+:\/*[^/]*$/;
  var protocol = /^([^:]+:)[\s\S]*$/;
  var domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;

  function resolveUrl(base, href) {
    if (!baseUrls[' ' + base]) {
      // we can ignore everything in base after the last slash of its path component,
      // but we might need to add _that_
      // https://tools.ietf.org/html/rfc3986#section-3
      if (justDomain.test(base)) {
        baseUrls[' ' + base] = base + '/';
      } else {
        baseUrls[' ' + base] = rtrim(base, '/', true);
      }
    }

    base = baseUrls[' ' + base];
    var relativeBase = base.indexOf(':') === -1;

    if (href.substring(0, 2) === '//') {
      if (relativeBase) {
        return href;
      }

      return base.replace(protocol, '$1') + href;
    } else if (href.charAt(0) === '/') {
      if (relativeBase) {
        return href;
      }

      return base.replace(domain, '$1') + href;
    } else {
      return base + href;
    }
  }

  var noopTest = {
    exec: function noopTest() {}
  };

  function merge(obj) {
    var i = 1,
        target,
        key;

    for (; i < arguments.length; i++) {
      target = arguments[i];

      for (key in target) {
        if (Object.prototype.hasOwnProperty.call(target, key)) {
          obj[key] = target[key];
        }
      }
    }

    return obj;
  }

  function splitCells(tableRow, count) {
    // ensure that every cell-delimiting pipe has a space
    // before it to distinguish it from an escaped pipe
    var row = tableRow.replace(/\|/g, function (match, offset, str) {
      var escaped = false,
          curr = offset;

      while (--curr >= 0 && str[curr] === '\\') {
        escaped = !escaped;
      }

      if (escaped) {
        // odd number of slashes means | is escaped
        // so we leave it alone
        return '|';
      } else {
        // add space before unescaped |
        return ' |';
      }
    }),
        cells = row.split(/ \|/);
    var i = 0;

    if (cells.length > count) {
      cells.splice(count);
    } else {
      while (cells.length < count) {
        cells.push('');
      }
    }

    for (; i < cells.length; i++) {
      // leading or trailing whitespace is ignored per the gfm spec
      cells[i] = cells[i].trim().replace(/\\\|/g, '|');
    }

    return cells;
  } // Remove trailing 'c's. Equivalent to str.replace(/c*$/, '').
  // /c*$/ is vulnerable to REDOS.
  // invert: Remove suffix of non-c chars instead. Default falsey.


  function rtrim(str, c, invert) {
    var l = str.length;

    if (l === 0) {
      return '';
    } // Length of suffix matching the invert condition.


    var suffLen = 0; // Step left until we fail to match the invert condition.

    while (suffLen < l) {
      var currChar = str.charAt(l - suffLen - 1);

      if (currChar === c && !invert) {
        suffLen++;
      } else if (currChar !== c && invert) {
        suffLen++;
      } else {
        break;
      }
    }

    return str.substr(0, l - suffLen);
  }

  function findClosingBracket(str, b) {
    if (str.indexOf(b[1]) === -1) {
      return -1;
    }

    var l = str.length;
    var level = 0,
        i = 0;

    for (; i < l; i++) {
      if (str[i] === '\\') {
        i++;
      } else if (str[i] === b[0]) {
        level++;
      } else if (str[i] === b[1]) {
        level--;

        if (level < 0) {
          return i;
        }
      }
    }

    return -1;
  }

  function checkSanitizeDeprecation(opt) {
    if (opt && opt.sanitize && !opt.silent) {
      console.warn('marked(): sanitize and sanitizer parameters are deprecated since version 0.7.0, should not be used and will be removed in the future. Read more here: https://marked.js.org/#/USING_ADVANCED.md#options');
    }
  } // copied from https://stackoverflow.com/a/5450113/806777


  function repeatString(pattern, count) {
    if (count < 1) {
      return '';
    }

    var result = '';

    while (count > 1) {
      if (count & 1) {
        result += pattern;
      }

      count >>= 1;
      pattern += pattern;
    }

    return result + pattern;
  }

  var helpers = {
    escape: escape,
    unescape: unescape,
    edit: edit,
    cleanUrl: cleanUrl,
    resolveUrl: resolveUrl,
    noopTest: noopTest,
    merge: merge,
    splitCells: splitCells,
    rtrim: rtrim,
    findClosingBracket: findClosingBracket,
    checkSanitizeDeprecation: checkSanitizeDeprecation,
    repeatString: repeatString
  };

  var defaults$1 = defaults.defaults;
  var rtrim$1 = helpers.rtrim,
      splitCells$1 = helpers.splitCells,
      _escape = helpers.escape,
      findClosingBracket$1 = helpers.findClosingBracket;

  function outputLink(cap, link, raw) {
    var href = link.href;
    var title = link.title ? _escape(link.title) : null;
    var text = cap[1].replace(/\\([\[\]])/g, '$1');

    if (cap[0].charAt(0) !== '!') {
      return {
        type: 'link',
        raw: raw,
        href: href,
        title: title,
        text: text
      };
    } else {
      return {
        type: 'image',
        raw: raw,
        href: href,
        title: title,
        text: _escape(text)
      };
    }
  }

  function indentCodeCompensation(raw, text) {
    var matchIndentToCode = raw.match(/^(\s+)(?:```)/);

    if (matchIndentToCode === null) {
      return text;
    }

    var indentToCode = matchIndentToCode[1];
    return text.split('\n').map(function (node) {
      var matchIndentInNode = node.match(/^\s+/);

      if (matchIndentInNode === null) {
        return node;
      }

      var indentInNode = matchIndentInNode[0];

      if (indentInNode.length >= indentToCode.length) {
        return node.slice(indentToCode.length);
      }

      return node;
    }).join('\n');
  }
  /**
   * Tokenizer
   */


  var Tokenizer_1 = /*#__PURE__*/function () {
    function Tokenizer(options) {
      this.options = options || defaults$1;
    }

    var _proto = Tokenizer.prototype;

    _proto.space = function space(src) {
      var cap = this.rules.block.newline.exec(src);

      if (cap) {
        if (cap[0].length > 1) {
          return {
            type: 'space',
            raw: cap[0]
          };
        }

        return {
          raw: '\n'
        };
      }
    };

    _proto.code = function code(src, tokens) {
      var cap = this.rules.block.code.exec(src);

      if (cap) {
        var lastToken = tokens[tokens.length - 1]; // An indented code block cannot interrupt a paragraph.

        if (lastToken && lastToken.type === 'paragraph') {
          return {
            raw: cap[0],
            text: cap[0].trimRight()
          };
        }

        var text = cap[0].replace(/^ {1,4}/gm, '');
        return {
          type: 'code',
          raw: cap[0],
          codeBlockStyle: 'indented',
          text: !this.options.pedantic ? rtrim$1(text, '\n') : text
        };
      }
    };

    _proto.fences = function fences(src) {
      var cap = this.rules.block.fences.exec(src);

      if (cap) {
        var raw = cap[0];
        var text = indentCodeCompensation(raw, cap[3] || '');
        return {
          type: 'code',
          raw: raw,
          lang: cap[2] ? cap[2].trim() : cap[2],
          text: text
        };
      }
    };

    _proto.heading = function heading(src) {
      var cap = this.rules.block.heading.exec(src);

      if (cap) {
        var text = cap[2].trim(); // remove trailing #s

        if (/#$/.test(text)) {
          var trimmed = rtrim$1(text, '#');

          if (this.options.pedantic) {
            text = trimmed.trim();
          } else if (!trimmed || / $/.test(trimmed)) {
            // CommonMark requires space before trailing #s
            text = trimmed.trim();
          }
        }

        return {
          type: 'heading',
          raw: cap[0],
          depth: cap[1].length,
          text: text
        };
      }
    };

    _proto.nptable = function nptable(src) {
      var cap = this.rules.block.nptable.exec(src);

      if (cap) {
        var item = {
          type: 'table',
          header: splitCells$1(cap[1].replace(/^ *| *\| *$/g, '')),
          align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
          cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : [],
          raw: cap[0]
        };

        if (item.header.length === item.align.length) {
          var l = item.align.length;
          var i;

          for (i = 0; i < l; 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;
            }
          }

          l = item.cells.length;

          for (i = 0; i < l; i++) {
            item.cells[i] = splitCells$1(item.cells[i], item.header.length);
          }

          return item;
        }
      }
    };

    _proto.hr = function hr(src) {
      var cap = this.rules.block.hr.exec(src);

      if (cap) {
        return {
          type: 'hr',
          raw: cap[0]
        };
      }
    };

    _proto.blockquote = function blockquote(src) {
      var cap = this.rules.block.blockquote.exec(src);

      if (cap) {
        var text = cap[0].replace(/^ *> ?/gm, '');
        return {
          type: 'blockquote',
          raw: cap[0],
          text: text
        };
      }
    };

    _proto.list = function list(src) {
      var cap = this.rules.block.list.exec(src);

      if (cap) {
        var raw = cap[0];
        var bull = cap[2];
        var isordered = bull.length > 1;
        var list = {
          type: 'list',
          raw: raw,
          ordered: isordered,
          start: isordered ? +bull.slice(0, -1) : '',
          loose: false,
          items: []
        }; // Get each top-level item.

        var itemMatch = cap[0].match(this.rules.block.item);
        var next = false,
            item,
            space,
            bcurr,
            bnext,
            addBack,
            loose,
            istask,
            ischecked;
        var l = itemMatch.length;
        bcurr = this.rules.block.listItemStart.exec(itemMatch[0]);

        for (var i = 0; i < l; i++) {
          item = itemMatch[i];
          raw = item; // Determine whether the next list item belongs here.
          // Backpedal if it does not belong in this list.

          if (i !== l - 1) {
            bnext = this.rules.block.listItemStart.exec(itemMatch[i + 1]);

            if (bnext[1].length > bcurr[0].length || bnext[1].length > 3) {
              // nested list
              itemMatch.splice(i, 2, itemMatch[i] + '\n' + itemMatch[i + 1]);
              i--;
              l--;
              continue;
            } else {
              if ( // different bullet style
              !this.options.pedantic || this.options.smartLists ? bnext[2][bnext[2].length - 1] !== bull[bull.length - 1] : isordered === (bnext[2].length === 1)) {
                addBack = itemMatch.slice(i + 1).join('\n');
                list.raw = list.raw.substring(0, list.raw.length - addBack.length);
                i = l - 1;
              }
            }

            bcurr = bnext;
          } // 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.options.pedantic ? item.replace(new RegExp('^ {1,' + space + '}', 'gm'), '') : item.replace(/^ {1,4}/gm, '');
          } // 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;
          }

          if (loose) {
            list.loose = true;
          } // Check for task list items


          if (this.options.gfm) {
            istask = /^\[[ xX]\] /.test(item);
            ischecked = undefined;

            if (istask) {
              ischecked = item[1] !== ' ';
              item = item.replace(/^\[[ xX]\] +/, '');
            }
          }

          list.items.push({
            type: 'list_item',
            raw: raw,
            task: istask,
            checked: ischecked,
            loose: loose,
            text: item
          });
        }

        return list;
      }
    };

    _proto.html = function html(src) {
      var cap = this.rules.block.html.exec(src);

      if (cap) {
        return {
          type: this.options.sanitize ? 'paragraph' : 'html',
          raw: cap[0],
          pre: !this.options.sanitizer && (cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style'),
          text: this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0]
        };
      }
    };

    _proto.def = function def(src) {
      var cap = this.rules.block.def.exec(src);

      if (cap) {
        if (cap[3]) cap[3] = cap[3].substring(1, cap[3].length - 1);
        var tag = cap[1].toLowerCase().replace(/\s+/g, ' ');
        return {
          tag: tag,
          raw: cap[0],
          href: cap[2],
          title: cap[3]
        };
      }
    };

    _proto.table = function table(src) {
      var cap = this.rules.block.table.exec(src);

      if (cap) {
        var item = {
          type: 'table',
          header: splitCells$1(cap[1].replace(/^ *| *\| *$/g, '')),
          align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
          cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : []
        };

        if (item.header.length === item.align.length) {
          item.raw = cap[0];
          var l = item.align.length;
          var i;

          for (i = 0; i < l; 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;
            }
          }

          l = item.cells.length;

          for (i = 0; i < l; i++) {
            item.cells[i] = splitCells$1(item.cells[i].replace(/^ *\| *| *\| *$/g, ''), item.header.length);
          }

          return item;
        }
      }
    };

    _proto.lheading = function lheading(src) {
      var cap = this.rules.block.lheading.exec(src);

      if (cap) {
        return {
          type: 'heading',
          raw: cap[0],
          depth: cap[2].charAt(0) === '=' ? 1 : 2,
          text: cap[1]
        };
      }
    };

    _proto.paragraph = function paragraph(src) {
      var cap = this.rules.block.paragraph.exec(src);

      if (cap) {
        return {
          type: 'paragraph',
          raw: cap[0],
          text: cap[1].charAt(cap[1].length - 1) === '\n' ? cap[1].slice(0, -1) : cap[1]
        };
      }
    };

    _proto.text = function text(src, tokens) {
      var cap = this.rules.block.text.exec(src);

      if (cap) {
        var lastToken = tokens[tokens.length - 1];

        if (lastToken && lastToken.type === 'text') {
          return {
            raw: cap[0],
            text: cap[0]
          };
        }

        return {
          type: 'text',
          raw: cap[0],
          text: cap[0]
        };
      }
    };

    _proto.escape = function escape(src) {
      var cap = this.rules.inline.escape.exec(src);

      if (cap) {
        return {
          type: 'escape',
          raw: cap[0],
          text: _escape(cap[1])
        };
      }
    };

    _proto.tag = function tag(src, inLink, inRawBlock) {
      var cap = this.rules.inline.tag.exec(src);

      if (cap) {
        if (!inLink && /^<a /i.test(cap[0])) {
          inLink = true;
        } else if (inLink && /^<\/a>/i.test(cap[0])) {
          inLink = false;
        }

        if (!inRawBlock && /^<(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
          inRawBlock = true;
        } else if (inRawBlock && /^<\/(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
          inRawBlock = false;
        }

        return {
          type: this.options.sanitize ? 'text' : 'html',
          raw: cap[0],
          inLink: inLink,
          inRawBlock: inRawBlock,
          text: this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0]
        };
      }
    };

    _proto.link = function link(src) {
      var cap = this.rules.inline.link.exec(src);

      if (cap) {
        var trimmedUrl = cap[2].trim();

        if (!this.options.pedantic && /^</.test(trimmedUrl)) {
          // commonmark requires matching angle brackets
          if (!/>$/.test(trimmedUrl)) {
            return;
          } // ending angle bracket cannot be escaped


          var rtrimSlash = rtrim$1(trimmedUrl.slice(0, -1), '\\');

          if ((trimmedUrl.length - rtrimSlash.length) % 2 === 0) {
            return;
          }
        } else {
          // find closing parenthesis
          var lastParenIndex = findClosingBracket$1(cap[2], '()');

          if (lastParenIndex > -1) {
            var start = cap[0].indexOf('!') === 0 ? 5 : 4;
            var linkLen = start + cap[1].length + lastParenIndex;
            cap[2] = cap[2].substring(0, lastParenIndex);
            cap[0] = cap[0].substring(0, linkLen).trim();
            cap[3] = '';
          }
        }

        var href = cap[2];
        var title = '';

        if (this.options.pedantic) {
          // split pedantic href and title
          var link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);

          if (link) {
            href = link[1];
            title = link[3];
          }
        } else {
          title = cap[3] ? cap[3].slice(1, -1) : '';
        }

        href = href.trim();

        if (/^</.test(href)) {
          if (this.options.pedantic && !/>$/.test(trimmedUrl)) {
            // pedantic allows starting angle bracket without ending angle bracket
            href = href.slice(1);
          } else {
            href = href.slice(1, -1);
          }
        }

        return outputLink(cap, {
          href: href ? href.replace(this.rules.inline._escapes, '$1') : href,
          title: title ? title.replace(this.rules.inline._escapes, '$1') : title
        }, cap[0]);
      }
    };

    _proto.reflink = function reflink(src, links) {
      var cap;

      if ((cap = this.rules.inline.reflink.exec(src)) || (cap = this.rules.inline.nolink.exec(src))) {
        var link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
        link = links[link.toLowerCase()];

        if (!link || !link.href) {
          var text = cap[0].charAt(0);
          return {
            type: 'text',
            raw: text,
            text: text
          };
        }

        return outputLink(cap, link, cap[0]);
      }
    };

    _proto.strong = function strong(src, maskedSrc, prevChar) {
      if (prevChar === void 0) {
        prevChar = '';
      }

      var match = this.rules.inline.strong.start.exec(src);

      if (match && (!match[1] || match[1] && (prevChar === '' || this.rules.inline.punctuation.exec(prevChar)))) {
        maskedSrc = maskedSrc.slice(-1 * src.length);
        var endReg = match[0] === '**' ? this.rules.inline.strong.endAst : this.rules.inline.strong.endUnd;
        endReg.lastIndex = 0;
        var cap;

        while ((match = endReg.exec(maskedSrc)) != null) {
          cap = this.rules.inline.strong.middle.exec(maskedSrc.slice(0, match.index + 3));

          if (cap) {
            return {
              type: 'strong',
              raw: src.slice(0, cap[0].length),
              text: src.slice(2, cap[0].length - 2)
            };
          }
        }
      }
    };

    _proto.em = function em(src, maskedSrc, prevChar) {
      if (prevChar === void 0) {
        prevChar = '';
      }

      var match = this.rules.inline.em.start.exec(src);

      if (match && (!match[1] || match[1] && (prevChar === '' || this.rules.inline.punctuation.exec(prevChar)))) {
        maskedSrc = maskedSrc.slice(-1 * src.length);
        var endReg = match[0] === '*' ? this.rules.inline.em.endAst : this.rules.inline.em.endUnd;
        endReg.lastIndex = 0;
        var cap;

        while ((match = endReg.exec(maskedSrc)) != null) {
          cap = this.rules.inline.em.middle.exec(maskedSrc.slice(0, match.index + 2));

          if (cap) {
            return {
              type: 'em',
              raw: src.slice(0, cap[0].length),
              text: src.slice(1, cap[0].length - 1)
            };
          }
        }
      }
    };

    _proto.codespan = function codespan(src) {
      var cap = this.rules.inline.code.exec(src);

      if (cap) {
        var text = cap[2].replace(/\n/g, ' ');
        var hasNonSpaceChars = /[^ ]/.test(text);
        var hasSpaceCharsOnBothEnds = /^ /.test(text) && / $/.test(text);

        if (hasNonSpaceChars && hasSpaceCharsOnBothEnds) {
          text = text.substring(1, text.length - 1);
        }

        text = _escape(text, true);
        return {
          type: 'codespan',
          raw: cap[0],
          text: text
        };
      }
    };

    _proto.br = function br(src) {
      var cap = this.rules.inline.br.exec(src);

      if (cap) {
        return {
          type: 'br',
          raw: cap[0]
        };
      }
    };

    _proto.del = function del(src) {
      var cap = this.rules.inline.del.exec(src);

      if (cap) {
        return {
          type: 'del',
          raw: cap[0],
          text: cap[2]
        };
      }
    };

    _proto.autolink = function autolink(src, mangle) {
      var cap = this.rules.inline.autolink.exec(src);

      if (cap) {
        var text, href;

        if (cap[2] === '@') {
          text = _escape(this.options.mangle ? mangle(cap[1]) : cap[1]);
          href = 'mailto:' + text;
        } else {
          text = _escape(cap[1]);
          href = text;
        }

        return {
          type: 'link',
          raw: cap[0],
          text: text,
          href: href,
          tokens: [{
            type: 'text',
            raw: text,
            text: text
          }]
        };
      }
    };

    _proto.url = function url(src, mangle) {
      var cap;

      if (cap = this.rules.inline.url.exec(src)) {
        var text, href;

        if (cap[2] === '@') {
          text = _escape(this.options.mangle ? mangle(cap[0]) : cap[0]);
          href = 'mailto:' + text;
        } else {
          // do extended autolink path validation
          var prevCapZero;

          do {
            prevCapZero = cap[0];
            cap[0] = this.rules.inline._backpedal.exec(cap[0])[0];
          } while (prevCapZero !== cap[0]);

          text = _escape(cap[0]);

          if (cap[1] === 'www.') {
            href = 'http://' + text;
          } else {
            href = text;
          }
        }

        return {
          type: 'link',
          raw: cap[0],
          text: text,
          href: href,
          tokens: [{
            type: 'text',
            raw: text,
            text: text
          }]
        };
      }
    };

    _proto.inlineText = function inlineText(src, inRawBlock, smartypants) {
      var cap = this.rules.inline.text.exec(src);

      if (cap) {
        var text;

        if (inRawBlock) {
          text = this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0];
        } else {
          text = _escape(this.options.smartypants ? smartypants(cap[0]) : cap[0]);
        }

        return {
          type: 'text',
          raw: cap[0],
          text: text
        };
      }
    };

    return Tokenizer;
  }();

  var noopTest$1 = helpers.noopTest,
      edit$1 = helpers.edit,
      merge$1 = helpers.merge;
  /**
   * Block-Level Grammar
   */

  var block = {
    newline: /^(?: *(?:\n|$))+/,
    code: /^( {4}[^\n]+(?:\n(?: *(?:\n|$))*)?)+/,
    fences: /^ {0,3}(`{3,}(?=[^`\n]*\n)|~{3,})([^\n]*)\n(?:|([\s\S]*?)\n)(?: {0,3}\1[~`]* *(?:\n+|$)|$)/,
    hr: /^ {0,3}((?:- *){3,}|(?:_ *){3,}|(?:\* *){3,})(?:\n+|$)/,
    heading: /^ {0,3}(#{1,6})(?=\s|$)(.*)(?:\n+|$)/,
    blockquote: /^( {0,3}> ?(paragraph|[^\n]*)(?:\n|$))+/,
    list: /^( {0,3})(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?! {0,3}bull )\n*|\s*$)/,
    html: '^ {0,3}(?:' // optional indentation
    + '<(script|pre|style)[\\s>][\\s\\S]*?(?:</\\1>[^\\n]*\\n+|$)' // (1)
    + '|comment[^\\n]*(\\n+|$)' // (2)
    + '|<\\?[\\s\\S]*?(?:\\?>\\n*|$)' // (3)
    + '|<![A-Z][\\s\\S]*?(?:>\\n*|$)' // (4)
    + '|<!\\[CDATA\\[[\\s\\S]*?(?:\\]\\]>\\n*|$)' // (5)
    + '|</?(tag)(?: +|\\n|/?>)[\\s\\S]*?(?:\\n{2,}|$)' // (6)
    + '|<(?!script|pre|style)([a-z][\\w-]*)(?:attribute)*? */?>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:\\n{2,}|$)' // (7) open tag
    + '|</(?!script|pre|style)[a-z][\\w-]*\\s*>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:\\n{2,}|$)' // (7) closing tag
    + ')',
    def: /^ {0,3}\[(label)\]: *\n? *<?([^\s>]+)>?(?:(?: +\n? *| *\n *)(title))? *(?:\n+|$)/,
    nptable: noopTest$1,
    table: noopTest$1,
    lheading: /^([^\n]+)\n {0,3}(=+|-+) *(?:\n+|$)/,
    // regex template, placeholders will be replaced according to different paragraph
    // interruption rules of commonmark and the original markdown spec:
    _paragraph: /^([^\n]+(?:\n(?!hr|heading|lheading|blockquote|fences|list|html| +\n)[^\n]+)*)/,
    text: /^[^\n]+/
  };
  block._label = /(?!\s*\])(?:\\[\[\]]|[^\[\]])+/;
  block._title = /(?:"(?:\\"?|[^"\\])*"|'[^'\n]*(?:\n[^'\n]+)*\n?'|\([^()]*\))/;
  block.def = edit$1(block.def).replace('label', block._label).replace('title', block._title).getRegex();
  block.bullet = /(?:[*+-]|\d{1,9}[.)])/;
  block.item = /^( *)(bull) ?[^\n]*(?:\n(?! *bull ?)[^\n]*)*/;
  block.item = edit$1(block.item, 'gm').replace(/bull/g, block.bullet).getRegex();
  block.listItemStart = edit$1(/^( *)(bull)/).replace('bull', block.bullet).getRegex();
  block.list = edit$1(block.list).replace(/bull/g, block.bullet).replace('hr', '\\n+(?=\\1?(?:(?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$))').replace('def', '\\n+(?=' + block.def.source + ')').getRegex();
  block._tag = 'address|article|aside|base|basefont|blockquote|body|caption' + '|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption' + '|figure|footer|form|frame|frameset|h[1-6]|head|header|hr|html|iframe' + '|legend|li|link|main|menu|menuitem|meta|nav|noframes|ol|optgroup|option' + '|p|param|section|source|summary|table|tbody|td|tfoot|th|thead|title|tr' + '|track|ul';
  block._comment = /<!--(?!-?>)[\s\S]*?(?:-->|$)/;
  block.html = edit$1(block.html, 'i').replace('comment', block._comment).replace('tag', block._tag).replace('attribute', / +[a-zA-Z:_][\w.:-]*(?: *= *"[^"\n]*"| *= *'[^'\n]*'| *= *[^\s"'=<>`]+)?/).getRegex();
  block.paragraph = edit$1(block._paragraph).replace('hr', block.hr).replace('heading', ' {0,3}#{1,6} ').replace('|lheading', '') // setex headings don't interrupt commonmark paragraphs
  .replace('blockquote', ' {0,3}>').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
  .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block._tag) // pars can be interrupted by type (6) html blocks
  .getRegex();
  block.blockquote = edit$1(block.blockquote).replace('paragraph', block.paragraph).getRegex();
  /**
   * Normal Block Grammar
   */

  block.normal = merge$1({}, block);
  /**
   * GFM Block Grammar
   */

  block.gfm = merge$1({}, block.normal, {
    nptable: '^ *([^|\\n ].*\\|.*)\\n' // Header
    + ' {0,3}([-:]+ *\\|[-| :]*)' // Align
    + '(?:\\n((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)',
    // Cells
    table: '^ *\\|(.+)\\n' // Header
    + ' {0,3}\\|?( *[-:]+[-| :]*)' // Align
    + '(?:\\n *((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)' // Cells

  });
  block.gfm.nptable = edit$1(block.gfm.nptable).replace('hr', block.hr).replace('heading', ' {0,3}#{1,6} ').replace('blockquote', ' {0,3}>').replace('code', ' {4}[^\\n]').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
  .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block._tag) // tables can be interrupted by type (6) html blocks
  .getRegex();
  block.gfm.table = edit$1(block.gfm.table).replace('hr', block.hr).replace('heading', ' {0,3}#{1,6} ').replace('blockquote', ' {0,3}>').replace('code', ' {4}[^\\n]').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
  .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block._tag) // tables can be interrupted by type (6) html blocks
  .getRegex();
  /**
   * Pedantic grammar (original John Gruber's loose markdown specification)
   */

  block.pedantic = merge$1({}, block.normal, {
    html: edit$1('^ *(?:comment *(?:\\n|\\s*$)' + '|<(tag)[\\s\\S]+?</\\1> *(?:\\n{2,}|\\s*$)' // closed tag
    + '|<tag(?:"[^"]*"|\'[^\']*\'|\\s[^\'"/>\\s]*)*?/?> *(?:\\n{2,}|\\s*$))').replace('comment', block._comment).replace(/tag/g, '(?!(?:' + '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').getRegex(),
    def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +(["(][^\n]+[")]))? *(?:\n+|$)/,
    heading: /^(#{1,6})(.*)(?:\n+|$)/,
    fences: noopTest$1,
    // fences not supported
    paragraph: edit$1(block.normal._paragraph).replace('hr', block.hr).replace('heading', ' *#{1,6} *[^\n]').replace('lheading', block.lheading).replace('blockquote', ' {0,3}>').replace('|fences', '').replace('|list', '').replace('|html', '').getRegex()
  });
  /**
   * Inline-Level Grammar
   */

  var inline = {
    escape: /^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/,
    autolink: /^<(scheme:[^\s\x00-\x1f<>]*|email)>/,
    url: noopTest$1,
    tag: '^comment' + '|^</[a-zA-Z][\\w:-]*\\s*>' // self-closing tag
    + '|^<[a-zA-Z][\\w-]*(?:attribute)*?\\s*/?>' // open tag
    + '|^<\\?[\\s\\S]*?\\?>' // processing instruction, e.g. <?php ?>
    + '|^<![a-zA-Z]+\\s[\\s\\S]*?>' // declaration, e.g. <!DOCTYPE html>
    + '|^<!\\[CDATA\\[[\\s\\S]*?\\]\\]>',
    // CDATA section
    link: /^!?\[(label)\]\(\s*(href)(?:\s+(title))?\s*\)/,
    reflink: /^!?\[(label)\]\[(?!\s*\])((?:\\[\[\]]?|[^\[\]\\])+)\]/,
    nolink: /^!?\[(?!\s*\])((?:\[[^\[\]]*\]|\\[\[\]]|[^\[\]])*)\](?:\[\])?/,
    reflinkSearch: 'reflink|nolink(?!\\()',
    strong: {
      start: /^(?:(\*\*(?=[*punctuation]))|\*\*)(?![\s])|__/,
      // (1) returns if starts w/ punctuation
      middle: /^\*\*(?:(?:(?!overlapSkip)(?:[^*]|\\\*)|overlapSkip)|\*(?:(?!overlapSkip)(?:[^*]|\\\*)|overlapSkip)*?\*)+?\*\*$|^__(?![\s])((?:(?:(?!overlapSkip)(?:[^_]|\\_)|overlapSkip)|_(?:(?!overlapSkip)(?:[^_]|\\_)|overlapSkip)*?_)+?)__$/,
      endAst: /[^punctuation\s]\*\*(?!\*)|[punctuation]\*\*(?!\*)(?:(?=[punctuation_\s]|$))/,
      // last char can't be punct, or final * must also be followed by punct (or endline)
      endUnd: /[^\s]__(?!_)(?:(?=[punctuation*\s])|$)/ // last char can't be a space, and final _ must preceed punct or \s (or endline)

    },
    em: {
      start: /^(?:(\*(?=[punctuation]))|\*)(?![*\s])|_/,
      // (1) returns if starts w/ punctuation
      middle: /^\*(?:(?:(?!overlapSkip)(?:[^*]|\\\*)|overlapSkip)|\*(?:(?!overlapSkip)(?:[^*]|\\\*)|overlapSkip)*?\*)+?\*$|^_(?![_\s])(?:(?:(?!overlapSkip)(?:[^_]|\\_)|overlapSkip)|_(?:(?!overlapSkip)(?:[^_]|\\_)|overlapSkip)*?_)+?_$/,
      endAst: /[^punctuation\s]\*(?!\*)|[punctuation]\*(?!\*)(?:(?=[punctuation_\s]|$))/,
      // last char can't be punct, or final * must also be followed by punct (or endline)
      endUnd: /[^\s]_(?!_)(?:(?=[punctuation*\s])|$)/ // last char can't be a space, and final _ must preceed punct or \s (or endline)

    },
    code: /^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,
    br: /^( {2,}|\\)\n(?!\s*$)/,
    del: noopTest$1,
    text: /^(`+|[^`])(?:(?= {2,}\n)|[\s\S]*?(?:(?=[\\<!\[`*]|\b_|$)|[^ ](?= {2,}\n)))/,
    punctuation: /^([\s*punctuation])/
  }; // list of punctuation marks from common mark spec
  // without * and _ to workaround cases with double emphasis

  inline._punctuation = '!"#$%&\'()+\\-.,/:;<=>?@\\[\\]`^{|}~';
  inline.punctuation = edit$1(inline.punctuation).replace(/punctuation/g, inline._punctuation).getRegex(); // sequences em should skip over [title](link), `code`, <html>

  inline._blockSkip = '\\[[^\\]]*?\\]\\([^\\)]*?\\)|`[^`]*?`|<[^>]*?>';
  inline._overlapSkip = '__[^_]*?__|\\*\\*\\[^\\*\\]*?\\*\\*';
  inline._comment = edit$1(block._comment).replace('(?:-->|$)', '-->').getRegex();
  inline.em.start = edit$1(inline.em.start).replace(/punctuation/g, inline._punctuation).getRegex();
  inline.em.middle = edit$1(inline.em.middle).replace(/punctuation/g, inline._punctuation).replace(/overlapSkip/g, inline._overlapSkip).getRegex();
  inline.em.endAst = edit$1(inline.em.endAst, 'g').replace(/punctuation/g, inline._punctuation).getRegex();
  inline.em.endUnd = edit$1(inline.em.endUnd, 'g').replace(/punctuation/g, inline._punctuation).getRegex();
  inline.strong.start = edit$1(inline.strong.start).replace(/punctuation/g, inline._punctuation).getRegex();
  inline.strong.middle = edit$1(inline.strong.middle).replace(/punctuation/g, inline._punctuation).replace(/overlapSkip/g, inline._overlapSkip).getRegex();
  inline.strong.endAst = edit$1(inline.strong.endAst, 'g').replace(/punctuation/g, inline._punctuation).getRegex();
  inline.strong.endUnd = edit$1(inline.strong.endUnd, 'g').replace(/punctuation/g, inline._punctuation).getRegex();
  inline.blockSkip = edit$1(inline._blockSkip, 'g').getRegex();
  inline.overlapSkip = edit$1(inline._overlapSkip, 'g').getRegex();
  inline._escapes = /\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g;
  inline._scheme = /[a-zA-Z][a-zA-Z0-9+.-]{1,31}/;
  inline._email = /[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])/;
  inline.autolink = edit$1(inline.autolink).replace('scheme', inline._scheme).replace('email', inline._email).getRegex();
  inline._attribute = /\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/;
  inline.tag = edit$1(inline.tag).replace('comment', inline._comment).replace('attribute', inline._attribute).getRegex();
  inline._label = /(?:\[(?:\\.|[^\[\]\\])*\]|\\.|`[^`]*`|[^\[\]\\`])*?/;
  inline._href = /<(?:\\.|[^\n<>\\])+>|[^\s\x00-\x1f]*/;
  inline._title = /"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/;
  inline.link = edit$1(inline.link).replace('label', inline._label).replace('href', inline._href).replace('title', inline._title).getRegex();
  inline.reflink = edit$1(inline.reflink).replace('label', inline._label).getRegex();
  inline.reflinkSearch = edit$1(inline.reflinkSearch, 'g').replace('reflink', inline.reflink).replace('nolink', inline.nolink).getRegex();
  /**
   * Normal Inline Grammar
   */

  inline.normal = merge$1({}, inline);
  /**
   * Pedantic Inline Grammar
   */

  inline.pedantic = merge$1({}, inline.normal, {
    strong: {
      start: /^__|\*\*/,
      middle: /^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,
      endAst: /\*\*(?!\*)/g,
      endUnd: /__(?!_)/g
    },
    em: {
      start: /^_|\*/,
      middle: /^()\*(?=\S)([\s\S]*?\S)\*(?!\*)|^_(?=\S)([\s\S]*?\S)_(?!_)/,
      endAst: /\*(?!\*)/g,
      endUnd: /_(?!_)/g
    },
    link: edit$1(/^!?\[(label)\]\((.*?)\)/).replace('label', inline._label).getRegex(),
    reflink: edit$1(/^!?\[(label)\]\s*\[([^\]]*)\]/).replace('label', inline._label).getRegex()
  });
  /**
   * GFM Inline Grammar
   */

  inline.gfm = merge$1({}, inline.normal, {
    escape: edit$1(inline.escape).replace('])', '~|])').getRegex(),
    _extended_email: /[A-Za-z0-9._+-]+(@)[a-zA-Z0-9-_]+(?:\.[a-zA-Z0-9-_]*[a-zA-Z0-9])+(?![-_])/,
    url: /^((?:ftp|https?):\/\/|www\.)(?:[a-zA-Z0-9\-]+\.?)+[^\s<]*|^email/,
    _backpedal: /(?:[^?!.,:;*_~()&]+|\([^)]*\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_~)]+(?!$))+/,
    del: /^(~~?)(?=[^\s~])([\s\S]*?[^\s~])\1(?=[^~]|$)/,
    text: /^([`~]+|[^`~])(?:(?= {2,}\n)|[\s\S]*?(?:(?=[\\<!\[`*~]|\b_|https?:\/\/|ftp:\/\/|www\.|$)|[^ ](?= {2,}\n)|[^a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-](?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@))|(?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@))/
  });
  inline.gfm.url = edit$1(inline.gfm.url, 'i').replace('email', inline.gfm._extended_email).getRegex();
  /**
   * GFM + Line Breaks Inline Grammar
   */

  inline.breaks = merge$1({}, inline.gfm, {
    br: edit$1(inline.br).replace('{2,}', '*').getRegex(),
    text: edit$1(inline.gfm.text).replace('\\b_', '\\b_| {2,}\\n').replace(/\{2,\}/g, '*').getRegex()
  });
  var rules = {
    block: block,
    inline: inline
  };

  var defaults$2 = defaults.defaults;
  var block$1 = rules.block,
      inline$1 = rules.inline;
  var repeatString$1 = helpers.repeatString;
  /**
   * smartypants text replacement
   */

  function smartypants(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 email addresses
   */


  function mangle(text) {
    var out = '',
        i,
        ch;
    var l = text.length;

    for (i = 0; i < l; i++) {
      ch = text.charCodeAt(i);

      if (Math.random() > 0.5) {
        ch = 'x' + ch.toString(16);
      }

      out += '&#' + ch + ';';
    }

    return out;
  }
  /**
   * Block Lexer
   */


  var Lexer_1 = /*#__PURE__*/function () {
    function Lexer(options) {
      this.tokens = [];
      this.tokens.links = Object.create(null);
      this.options = options || defaults$2;
      this.options.tokenizer = this.options.tokenizer || new Tokenizer_1();
      this.tokenizer = this.options.tokenizer;
      this.tokenizer.options = this.options;
      var rules = {
        block: block$1.normal,
        inline: inline$1.normal
      };

      if (this.options.pedantic) {
        rules.block = block$1.pedantic;
        rules.inline = inline$1.pedantic;
      } else if (this.options.gfm) {
        rules.block = block$1.gfm;

        if (this.options.breaks) {
          rules.inline = inline$1.breaks;
        } else {
          rules.inline = inline$1.gfm;
        }
      }

      this.tokenizer.rules = rules;
    }
    /**
     * Expose Rules
     */


    /**
     * Static Lex Method
     */
    Lexer.lex = function lex(src, options) {
      var lexer = new Lexer(options);
      return lexer.lex(src);
    }
    /**
     * Static Lex Inline Method
     */
    ;

    Lexer.lexInline = function lexInline(src, options) {
      var lexer = new Lexer(options);
      return lexer.inlineTokens(src);
    }
    /**
     * Preprocessing
     */
    ;

    var _proto = Lexer.prototype;

    _proto.lex = function lex(src) {
      src = src.replace(/\r\n|\r/g, '\n').replace(/\t/g, '    ');
      this.blockTokens(src, this.tokens, true);
      this.inline(this.tokens);
      return this.tokens;
    }
    /**
     * Lexing
     */
    ;

    _proto.blockTokens = function blockTokens(src, tokens, top) {
      if (tokens === void 0) {
        tokens = [];
      }

      if (top === void 0) {
        top = true;
      }

      if (this.options.pedantic) {
        src = src.replace(/^ +$/gm, '');
      }

      var token, i, l, lastToken;

      while (src) {
        // newline
        if (token = this.tokenizer.space(src)) {
          src = src.substring(token.raw.length);

          if (token.type) {
            tokens.push(token);
          }

          continue;
        } // code


        if (token = this.tokenizer.code(src, tokens)) {
          src = src.substring(token.raw.length);

          if (token.type) {
            tokens.push(token);
          } else {
            lastToken = tokens[tokens.length - 1];
            lastToken.raw += '\n' + token.raw;
            lastToken.text += '\n' + token.text;
          }

          continue;
        } // fences


        if (token = this.tokenizer.fences(src)) {
          src = src.substring(token.raw.length);
          tokens.push(token);
          continue;
        } // heading


        if (token = this.tokenizer.heading(src)) {
          src = src.substring(token.raw.length);
          tokens.push(token);
          continue;
        } // table no leading pipe (gfm)


        if (token = this.tokenizer.nptable(src)) {
          src = src.substring(token.raw.length);
          tokens.push(token);
          continue;
        } // hr


        if (token = this.tokenizer.hr(src)) {
          src = src.substring(token.raw.length);
          tokens.push(token);
          continue;
        } // blockquote


        if (token = this.tokenizer.blockquote(src)) {
          src = src.substring(token.raw.length);
          token.tokens = this.blockTokens(token.text, [], top);
          tokens.push(token);
          continue;
        } // list


        if (token = this.tokenizer.list(src)) {
          src = src.substring(token.raw.length);
          l = token.items.length;

          for (i = 0; i < l; i++) {
            token.items[i].tokens = this.blockTokens(token.items[i].text, [], false);
          }

          tokens.push(token);
          continue;
        } // html


        if (token = this.tokenizer.html(src)) {
          src = src.substring(token.raw.length);
          tokens.push(token);
          continue;
        } // def


        if (top && (token = this.tokenizer.def(src))) {
          src = src.substring(token.raw.length);

          if (!this.tokens.links[token.tag]) {
            this.tokens.links[token.tag] = {
              href: token.href,
              title: token.title
            };
          }

          continue;
        } // table (gfm)


        if (token = this.tokenizer.table(src)) {
          src = src.substring(token.raw.length);
          tokens.push(token);
          continue;
        } // lheading


        if (token = this.tokenizer.lheading(src)) {
          src = src.substring(token.raw.length);
          tokens.push(token);
          continue;
        } // top-level paragraph


        if (top && (token = this.tokenizer.paragraph(src))) {
          src = src.substring(token.raw.length);
          tokens.push(token);
          continue;
        } // text


        if (token = this.tokenizer.text(src, tokens)) {
          src = src.substring(token.raw.length);

          if (token.type) {
            tokens.push(token);
          } else {
            lastToken = tokens[tokens.length - 1];
            lastToken.raw += '\n' + token.raw;
            lastToken.text += '\n' + token.text;
          }

          continue;
        }

        if (src) {
          var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);

          if (this.options.silent) {
            console.error(errMsg);
            break;
          } else {
            throw new Error(errMsg);
          }
        }
      }

      return tokens;
    };

    _proto.inline = function inline(tokens) {
      var i, j, k, l2, row, token;
      var l = tokens.length;

      for (i = 0; i < l; i++) {
        token = tokens[i];

        switch (token.type) {
          case 'paragraph':
          case 'text':
          case 'heading':
            {
              token.tokens = [];
              this.inlineTokens(token.text, token.tokens);
              break;
            }

          case 'table':
            {
              token.tokens = {
                header: [],
                cells: []
              }; // header

              l2 = token.header.length;

              for (j = 0; j < l2; j++) {
                token.tokens.header[j] = [];
                this.inlineTokens(token.header[j], token.tokens.header[j]);
              } // cells


              l2 = token.cells.length;

              for (j = 0; j < l2; j++) {
                row = token.cells[j];
                token.tokens.cells[j] = [];

                for (k = 0; k < row.length; k++) {
                  token.tokens.cells[j][k] = [];
                  this.inlineTokens(row[k], token.tokens.cells[j][k]);
                }
              }

              break;
            }

          case 'blockquote':
            {
              this.inline(token.tokens);
              break;
            }

          case 'list':
            {
              l2 = token.items.length;

              for (j = 0; j < l2; j++) {
                this.inline(token.items[j].tokens);
              }

              break;
            }
        }
      }

      return tokens;
    }
    /**
     * Lexing/Compiling
     */
    ;

    _proto.inlineTokens = function inlineTokens(src, tokens, inLink, inRawBlock) {
      if (tokens === void 0) {
        tokens = [];
      }

      if (inLink === void 0) {
        inLink = false;
      }

      if (inRawBlock === void 0) {
        inRawBlock = false;
      }

      var token; // String with links masked to avoid interference with em and strong

      var maskedSrc = src;
      var match;
      var keepPrevChar, prevChar; // Mask out reflinks

      if (this.tokens.links) {
        var links = Object.keys(this.tokens.links);

        if (links.length > 0) {
          while ((match = this.tokenizer.rules.inline.reflinkSearch.exec(maskedSrc)) != null) {
            if (links.includes(match[0].slice(match[0].lastIndexOf('[') + 1, -1))) {
              maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString$1('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);
            }
          }
        }
      } // Mask out other blocks


      while ((match = this.tokenizer.rules.inline.blockSkip.exec(maskedSrc)) != null) {
        maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString$1('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);
      }

      while (src) {
        if (!keepPrevChar) {
          prevChar = '';
        }

        keepPrevChar = false; // escape

        if (token = this.tokenizer.escape(src)) {
          src = src.substring(token.raw.length);
          tokens.push(token);
          continue;
        } // tag


        if (token = this.tokenizer.tag(src, inLink, inRawBlock)) {
          src = src.substring(token.raw.length);
          inLink = token.inLink;
          inRawBlock = token.inRawBlock;
          tokens.push(token);
          continue;
        } // link


        if (token = this.tokenizer.link(src)) {
          src = src.substring(token.raw.length);

          if (token.type === 'link') {
            token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
          }

          tokens.push(token);
          continue;
        } // reflink, nolink


        if (token = this.tokenizer.reflink(src, this.tokens.links)) {
          src = src.substring(token.raw.length);

          if (token.type === 'link') {
            token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
          }

          tokens.push(token);
          continue;
        } // strong


        if (token = this.tokenizer.strong(src, maskedSrc, prevChar)) {
          src = src.substring(token.raw.length);
          token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
          tokens.push(token);
          continue;
        } // em


        if (token = this.tokenizer.em(src, maskedSrc, prevChar)) {
          src = src.substring(token.raw.length);
          token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
          tokens.push(token);
          continue;
        } // code


        if (token = this.tokenizer.codespan(src)) {
          src = src.substring(token.raw.length);
          tokens.push(token);
          continue;
        } // br


        if (token = this.tokenizer.br(src)) {
          src = src.substring(token.raw.length);
          tokens.push(token);
          continue;
        } // del (gfm)


        if (token = this.tokenizer.del(src)) {
          src = src.substring(token.raw.length);
          token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
          tokens.push(token);
          continue;
        } // autolink


        if (token = this.tokenizer.autolink(src, mangle)) {
          src = src.substring(token.raw.length);
          tokens.push(token);
          continue;
        } // url (gfm)


        if (!inLink && (token = this.tokenizer.url(src, mangle))) {
          src = src.substring(token.raw.length);
          tokens.push(token);
          continue;
        } // text


        if (token = this.tokenizer.inlineText(src, inRawBlock, smartypants)) {
          src = src.substring(token.raw.length);
          prevChar = token.raw.slice(-1);
          keepPrevChar = true;
          tokens.push(token);
          continue;
        }

        if (src) {
          var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);

          if (this.options.silent) {
            console.error(errMsg);
            break;
          } else {
            throw new Error(errMsg);
          }
        }
      }

      return tokens;
    };

    _createClass(Lexer, null, [{
      key: "rules",
      get: function get() {
        return {
          block: block$1,
          inline: inline$1
        };
      }
    }]);

    return Lexer;
  }();

  var defaults$3 = defaults.defaults;
  var cleanUrl$1 = helpers.cleanUrl,
      escape$1 = helpers.escape;
  /**
   * Renderer
   */

  var Renderer_1 = /*#__PURE__*/function () {
    function Renderer(options) {
      this.options = options || defaults$3;
    }

    var _proto = Renderer.prototype;

    _proto.code = function code(_code, infostring, escaped) {
      var lang = (infostring || '').match(/\S*/)[0];

      if (this.options.highlight) {
        var out = this.options.highlight(_code, lang);

        if (out != null && out !== _code) {
          escaped = true;
          _code = out;
        }
      }

      _code = _code.replace(/\n$/, '') + '\n';

      if (!lang) {
        return '<pre><code>' + (escaped ? _code : escape$1(_code, true)) + '</code></pre>\n';
      }

      return '<pre><code class="' + this.options.langPrefix + escape$1(lang, true) + '">' + (escaped ? _code : escape$1(_code, true)) + '</code></pre>\n';
    };

    _proto.blockquote = function blockquote(quote) {
      return '<blockquote>\n' + quote + '</blockquote>\n';
    };

    _proto.html = function html(_html) {
      return _html;
    };

    _proto.heading = function heading(text, level, raw, slugger) {
      if (this.options.headerIds) {
        return '<h' + level + ' id="' + this.options.headerPrefix + slugger.slug(raw) + '">' + text + '</h' + level + '>\n';
      } // ignore IDs


      return '<h' + level + '>' + text + '</h' + level + '>\n';
    };

    _proto.hr = function hr() {
      return this.options.xhtml ? '<hr/>\n' : '<hr>\n';
    };

    _proto.list = function list(body, ordered, start) {
      var type = ordered ? 'ol' : 'ul',
          startatt = ordered && start !== 1 ? ' start="' + start + '"' : '';
      return '<' + type + startatt + '>\n' + body + '</' + type + '>\n';
    };

    _proto.listitem = function listitem(text) {
      return '<li>' + text + '</li>\n';
    };

    _proto.checkbox = function checkbox(checked) {
      return '<input ' + (checked ? 'checked="" ' : '') + 'disabled="" type="checkbox"' + (this.options.xhtml ? ' /' : '') + '> ';
    };

    _proto.paragraph = function paragraph(text) {
      return '<p>' + text + '</p>\n';
    };

    _proto.table = function table(header, body) {
      if (body) body = '<tbody>' + body + '</tbody>';
      return '<table>\n' + '<thead>\n' + header + '</thead>\n' + body + '</table>\n';
    };

    _proto.tablerow = function tablerow(content) {
      return '<tr>\n' + content + '</tr>\n';
    };

    _proto.tablecell = function tablecell(content, flags) {
      var type = flags.header ? 'th' : 'td';
      var tag = flags.align ? '<' + type + ' align="' + flags.align + '">' : '<' + type + '>';
      return tag + content + '</' + type + '>\n';
    } // span level renderer
    ;

    _proto.strong = function strong(text) {
      return '<strong>' + text + '</strong>';
    };

    _proto.em = function em(text) {
      return '<em>' + text + '</em>';
    };

    _proto.codespan = function codespan(text) {
      return '<code>' + text + '</code>';
    };

    _proto.br = function br() {
      return this.options.xhtml ? '<br/>' : '<br>';
    };

    _proto.del = function del(text) {
      return '<del>' + text + '</del>';
    };

    _proto.link = function link(href, title, text) {
      href = cleanUrl$1(this.options.sanitize, this.options.baseUrl, href);

      if (href === null) {
        return text;
      }

      var out = '<a href="' + escape$1(href) + '"';

      if (title) {
        out += ' title="' + title + '"';
      }

      out += '>' + text + '</a>';
      return out;
    };

    _proto.image = function image(href, title, text) {
      href = cleanUrl$1(this.options.sanitize, this.options.baseUrl, href);

      if (href === null) {
        return text;
      }

      var out = '<img src="' + href + '" alt="' + text + '"';

      if (title) {
        out += ' title="' + title + '"';
      }

      out += this.options.xhtml ? '/>' : '>';
      return out;
    };

    _proto.text = function text(_text) {
      return _text;
    };

    return Renderer;
  }();

  /**
   * TextRenderer
   * returns only the textual part of the token
   */
  var TextRenderer_1 = /*#__PURE__*/function () {
    function TextRenderer() {}

    var _proto = TextRenderer.prototype;

    // no need for block level renderers
    _proto.strong = function strong(text) {
      return text;
    };

    _proto.em = function em(text) {
      return text;
    };

    _proto.codespan = function codespan(text) {
      return text;
    };

    _proto.del = function del(text) {
      return text;
    };

    _proto.html = function html(text) {
      return text;
    };

    _proto.text = function text(_text) {
      return _text;
    };

    _proto.link = function link(href, title, text) {
      return '' + text;
    };

    _proto.image = function image(href, title, text) {
      return '' + text;
    };

    _proto.br = function br() {
      return '';
    };

    return TextRenderer;
  }();

  /**
   * Slugger generates header id
   */
  var Slugger_1 = /*#__PURE__*/function () {
    function Slugger() {
      this.seen = {};
    }

    var _proto = Slugger.prototype;

    _proto.serialize = function serialize(value) {
      return value.toLowerCase().trim() // remove html tags
      .replace(/<[!\/a-z].*?>/ig, '') // remove unwanted chars
      .replace(/[\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,./:;<=>?@[\]^`{|}~]/g, '').replace(/\s/g, '-');
    }
    /**
     * Finds the next safe (unique) slug to use
     */
    ;

    _proto.getNextSafeSlug = function getNextSafeSlug(originalSlug, isDryRun) {
      var slug = originalSlug;
      var occurenceAccumulator = 0;

      if (this.seen.hasOwnProperty(slug)) {
        occurenceAccumulator = this.seen[originalSlug];

        do {
          occurenceAccumulator++;
          slug = originalSlug + '-' + occurenceAccumulator;
        } while (this.seen.hasOwnProperty(slug));
      }

      if (!isDryRun) {
        this.seen[originalSlug] = occurenceAccumulator;
        this.seen[slug] = 0;
      }

      return slug;
    }
    /**
     * Convert string to unique id
     * @param {object} options
     * @param {boolean} options.dryrun Generates the next unique slug without updating the internal accumulator.
     */
    ;

    _proto.slug = function slug(value, options) {
      if (options === void 0) {
        options = {};
      }

      var slug = this.serialize(value);
      return this.getNextSafeSlug(slug, options.dryrun);
    };

    return Slugger;
  }();

  var defaults$4 = defaults.defaults;
  var unescape$1 = helpers.unescape;
  /**
   * Parsing & Compiling
   */

  var Parser_1 = /*#__PURE__*/function () {
    function Parser(options) {
      this.options = options || defaults$4;
      this.options.renderer = this.options.renderer || new Renderer_1();
      this.renderer = this.options.renderer;
      this.renderer.options = this.options;
      this.textRenderer = new TextRenderer_1();
      this.slugger = new Slugger_1();
    }
    /**
     * Static Parse Method
     */


    Parser.parse = function parse(tokens, options) {
      var parser = new Parser(options);
      return parser.parse(tokens);
    }
    /**
     * Static Parse Inline Method
     */
    ;

    Parser.parseInline = function parseInline(tokens, options) {
      var parser = new Parser(options);
      return parser.parseInline(tokens);
    }
    /**
     * Parse Loop
     */
    ;

    var _proto = Parser.prototype;

    _proto.parse = function parse(tokens, top) {
      if (top === void 0) {
        top = true;
      }

      var out = '',
          i,
          j,
          k,
          l2,
          l3,
          row,
          cell,
          header,
          body,
          token,
          ordered,
          start,
          loose,
          itemBody,
          item,
          checked,
          task,
          checkbox;
      var l = tokens.length;

      for (i = 0; i < l; i++) {
        token = tokens[i];

        switch (token.type) {
          case 'space':
            {
              continue;
            }

          case 'hr':
            {
              out += this.renderer.hr();
              continue;
            }

          case 'heading':
            {
              out += this.renderer.heading(this.parseInline(token.tokens), token.depth, unescape$1(this.parseInline(token.tokens, this.textRenderer)), this.slugger);
              continue;
            }

          case 'code':
            {
              out += this.renderer.code(token.text, token.lang, token.escaped);
              continue;
            }

          case 'table':
            {
              header = ''; // header

              cell = '';
              l2 = token.header.length;

              for (j = 0; j < l2; j++) {
                cell += this.renderer.tablecell(this.parseInline(token.tokens.header[j]), {
                  header: true,
                  align: token.align[j]
                });
              }

              header += this.renderer.tablerow(cell);
              body = '';
              l2 = token.cells.length;

              for (j = 0; j < l2; j++) {
                row = token.tokens.cells[j];
                cell = '';
                l3 = row.length;

                for (k = 0; k < l3; k++) {
                  cell += this.renderer.tablecell(this.parseInline(row[k]), {
                    header: false,
                    align: token.align[k]
                  });
                }

                body += this.renderer.tablerow(cell);
              }

              out += this.renderer.table(header, body);
              continue;
            }

          case 'blockquote':
            {
              body = this.parse(token.tokens);
              out += this.renderer.blockquote(body);
              continue;
            }

          case 'list':
            {
              ordered = token.ordered;
              start = token.start;
              loose = token.loose;
              l2 = token.items.length;
              body = '';

              for (j = 0; j < l2; j++) {
                item = token.items[j];
                checked = item.checked;
                task = item.task;
                itemBody = '';

                if (item.task) {
                  checkbox = this.renderer.checkbox(checked);

                  if (loose) {
                    if (item.tokens.length > 0 && item.tokens[0].type === 'text') {
                      item.tokens[0].text = checkbox + ' ' + item.tokens[0].text;

                      if (item.tokens[0].tokens && item.tokens[0].tokens.length > 0 && item.tokens[0].tokens[0].type === 'text') {
                        item.tokens[0].tokens[0].text = checkbox + ' ' + item.tokens[0].tokens[0].text;
                      }
                    } else {
                      item.tokens.unshift({
                        type: 'text',
                        text: checkbox
                      });
                    }
                  } else {
                    itemBody += checkbox;
                  }
                }

                itemBody += this.parse(item.tokens, loose);
                body += this.renderer.listitem(itemBody, task, checked);
              }

              out += this.renderer.list(body, ordered, start);
              continue;
            }

          case 'html':
            {
              // TODO parse inline content if parameter markdown=1
              out += this.renderer.html(token.text);
              continue;
            }

          case 'paragraph':
            {
              out += this.renderer.paragraph(this.parseInline(token.tokens));
              continue;
            }

          case 'text':
            {
              body = token.tokens ? this.parseInline(token.tokens) : token.text;

              while (i + 1 < l && tokens[i + 1].type === 'text') {
                token = tokens[++i];
                body += '\n' + (token.tokens ? this.parseInline(token.tokens) : token.text);
              }

              out += top ? this.renderer.paragraph(body) : body;
              continue;
            }

          default:
            {
              var errMsg = 'Token with "' + token.type + '" type was not found.';

              if (this.options.silent) {
                console.error(errMsg);
                return;
              } else {
                throw new Error(errMsg);
              }
            }
        }
      }

      return out;
    }
    /**
     * Parse Inline Tokens
     */
    ;

    _proto.parseInline = function parseInline(tokens, renderer) {
      renderer = renderer || this.renderer;
      var out = '',
          i,
          token;
      var l = tokens.length;

      for (i = 0; i < l; i++) {
        token = tokens[i];

        switch (token.type) {
          case 'escape':
            {
              out += renderer.text(token.text);
              break;
            }

          case 'html':
            {
              out += renderer.html(token.text);
              break;
            }

          case 'link':
            {
              out += renderer.link(token.href, token.title, this.parseInline(token.tokens, renderer));
              break;
            }

          case 'image':
            {
              out += renderer.image(token.href, token.title, token.text);
              break;
            }

          case 'strong':
            {
              out += renderer.strong(this.parseInline(token.tokens, renderer));
              break;
            }

          case 'em':
            {
              out += renderer.em(this.parseInline(token.tokens, renderer));
              break;
            }

          case 'codespan':
            {
              out += renderer.codespan(token.text);
              break;
            }

          case 'br':
            {
              out += renderer.br();
              break;
            }

          case 'del':
            {
              out += renderer.del(this.parseInline(token.tokens, renderer));
              break;
            }

          case 'text':
            {
              out += renderer.text(token.text);
              break;
            }

          default:
            {
              var errMsg = 'Token with "' + token.type + '" type was not found.';

              if (this.options.silent) {
                console.error(errMsg);
                return;
              } else {
                throw new Error(errMsg);
              }
            }
        }
      }

      return out;
    };

    return Parser;
  }();

  var merge$2 = helpers.merge,
      checkSanitizeDeprecation$1 = helpers.checkSanitizeDeprecation,
      escape$2 = helpers.escape;
  var getDefaults = defaults.getDefaults,
      changeDefaults = defaults.changeDefaults,
      defaults$5 = defaults.defaults;
  /**
   * Marked
   */

  function marked(src, opt, callback) {
    // throw error in case of non string input
    if (typeof src === 'undefined' || src === null) {
      throw new Error('marked(): input parameter is undefined or null');
    }

    if (typeof src !== 'string') {
      throw new Error('marked(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
    }

    if (typeof opt === 'function') {
      callback = opt;
      opt = null;
    }

    opt = merge$2({}, marked.defaults, opt || {});
    checkSanitizeDeprecation$1(opt);

    if (callback) {
      var highlight = opt.highlight;
      var tokens;

      try {
        tokens = Lexer_1.lex(src, opt);
      } catch (e) {
        return callback(e);
      }

      var done = function done(err) {
        var out;

        if (!err) {
          try {
            out = Parser_1.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 (!tokens.length) return done();
      var pending = 0;
      marked.walkTokens(tokens, function (token) {
        if (token.type === 'code') {
          pending++;
          setTimeout(function () {
            highlight(token.text, token.lang, function (err, code) {
              if (err) {
                return done(err);
              }

              if (code != null && code !== token.text) {
                token.text = code;
                token.escaped = true;
              }

              pending--;

              if (pending === 0) {
                done();
              }
            });
          }, 0);
        }
      });

      if (pending === 0) {
        done();
      }

      return;
    }

    try {
      var _tokens = Lexer_1.lex(src, opt);

      if (opt.walkTokens) {
        marked.walkTokens(_tokens, opt.walkTokens);
      }

      return Parser_1.parse(_tokens, opt);
    } catch (e) {
      e.message += '\nPlease report this to https://github.com/markedjs/marked.';

      if (opt.silent) {
        return '<p>An error occurred:</p><pre>' + escape$2(e.message + '', true) + '</pre>';
      }

      throw e;
    }
  }
  /**
   * Options
   */


  marked.options = marked.setOptions = function (opt) {
    merge$2(marked.defaults, opt);
    changeDefaults(marked.defaults);
    return marked;
  };

  marked.getDefaults = getDefaults;
  marked.defaults = defaults$5;
  /**
   * Use Extension
   */

  marked.use = function (extension) {
    var opts = merge$2({}, extension);

    if (extension.renderer) {
      (function () {
        var renderer = marked.defaults.renderer || new Renderer_1();

        var _loop = function _loop(prop) {
          var prevRenderer = renderer[prop];

          renderer[prop] = function () {
            for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
              args[_key] = arguments[_key];
            }

            var ret = extension.renderer[prop].apply(renderer, args);

            if (ret === false) {
              ret = prevRenderer.apply(renderer, args);
            }

            return ret;
          };
        };

        for (var prop in extension.renderer) {
          _loop(prop);
        }

        opts.renderer = renderer;
      })();
    }

    if (extension.tokenizer) {
      (function () {
        var tokenizer = marked.defaults.tokenizer || new Tokenizer_1();

        var _loop2 = function _loop2(prop) {
          var prevTokenizer = tokenizer[prop];

          tokenizer[prop] = function () {
            for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
              args[_key2] = arguments[_key2];
            }

            var ret = extension.tokenizer[prop].apply(tokenizer, args);

            if (ret === false) {
              ret = prevTokenizer.apply(tokenizer, args);
            }

            return ret;
          };
        };

        for (var prop in extension.tokenizer) {
          _loop2(prop);
        }

        opts.tokenizer = tokenizer;
      })();
    }

    if (extension.walkTokens) {
      var walkTokens = marked.defaults.walkTokens;

      opts.walkTokens = function (token) {
        extension.walkTokens(token);

        if (walkTokens) {
          walkTokens(token);
        }
      };
    }

    marked.setOptions(opts);
  };
  /**
   * Run callback for every token
   */


  marked.walkTokens = function (tokens, callback) {
    for (var _iterator = _createForOfIteratorHelperLoose(tokens), _step; !(_step = _iterator()).done;) {
      var token = _step.value;
      callback(token);

      switch (token.type) {
        case 'table':
          {
            for (var _iterator2 = _createForOfIteratorHelperLoose(token.tokens.header), _step2; !(_step2 = _iterator2()).done;) {
              var cell = _step2.value;
              marked.walkTokens(cell, callback);
            }

            for (var _iterator3 = _createForOfIteratorHelperLoose(token.tokens.cells), _step3; !(_step3 = _iterator3()).done;) {
              var row = _step3.value;

              for (var _iterator4 = _createForOfIteratorHelperLoose(row), _step4; !(_step4 = _iterator4()).done;) {
                var _cell = _step4.value;
                marked.walkTokens(_cell, callback);
              }
            }

            break;
          }

        case 'list':
          {
            marked.walkTokens(token.items, callback);
            break;
          }

        default:
          {
            if (token.tokens) {
              marked.walkTokens(token.tokens, callback);
            }
          }
      }
    }
  };
  /**
   * Parse Inline
   */


  marked.parseInline = function (src, opt) {
    // throw error in case of non string input
    if (typeof src === 'undefined' || src === null) {
      throw new Error('marked.parseInline(): input parameter is undefined or null');
    }

    if (typeof src !== 'string') {
      throw new Error('marked.parseInline(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
    }

    opt = merge$2({}, marked.defaults, opt || {});
    checkSanitizeDeprecation$1(opt);

    try {
      var tokens = Lexer_1.lexInline(src, opt);

      if (opt.walkTokens) {
        marked.walkTokens(tokens, opt.walkTokens);
      }

      return Parser_1.parseInline(tokens, opt);
    } catch (e) {
      e.message += '\nPlease report this to https://github.com/markedjs/marked.';

      if (opt.silent) {
        return '<p>An error occurred:</p><pre>' + escape$2(e.message + '', true) + '</pre>';
      }

      throw e;
    }
  };
  /**
   * Expose
   */


  marked.Parser = Parser_1;
  marked.parser = Parser_1.parse;
  marked.Renderer = Renderer_1;
  marked.TextRenderer = TextRenderer_1;
  marked.Lexer = Lexer_1;
  marked.lexer = Lexer_1.lex;
  marked.Tokenizer = Tokenizer_1;
  marked.Slugger = Slugger_1;
  marked.parse = marked;
  var marked_1 = marked;

  return marked_1;

})));