svelte/internal/index.js

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

function noop() { }
const identity = x => x;
function assign(tar, src) {
    // @ts-ignore
    for (const k in src)
        tar[k] = src[k];
    return tar;
}
function is_promise(value) {
    return value && typeof value === 'object' && typeof value.then === 'function';
}
function add_location(element, file, line, column, char) {
    element.__svelte_meta = {
        loc: { file, line, column, char }
    };
}
function run(fn) {
    return fn();
}
function blank_object() {
    return Object.create(null);
}
function run_all(fns) {
    fns.forEach(run);
}
function is_function(thing) {
    return typeof thing === 'function';
}
function safe_not_equal(a, b) {
    return a != a ? b == b : a !== b || ((a && typeof a === 'object') || typeof a === 'function');
}
function not_equal(a, b) {
    return a != a ? b == b : a !== b;
}
function validate_store(store, name) {
    if (!store || typeof store.subscribe !== 'function') {
        throw new Error(`'${name}' is not a store with a 'subscribe' method`);
    }
}
function subscribe(store, callback) {
    const unsub = store.subscribe(callback);
    return unsub.unsubscribe ? () => unsub.unsubscribe() : unsub;
}
function get_store_value(store) {
    let value;
    subscribe(store, _ => value = _)();
    return value;
}
function component_subscribe(component, store, callback) {
    component.$$.on_destroy.push(subscribe(store, callback));
}
function create_slot(definition, ctx, $$scope, fn) {
    if (definition) {
        const slot_ctx = get_slot_context(definition, ctx, $$scope, fn);
        return definition[0](slot_ctx);
    }
}
function get_slot_context(definition, ctx, $$scope, fn) {
    return definition[1] && fn
        ? assign($$scope.ctx.slice(), definition[1](fn(ctx)))
        : $$scope.ctx;
}
function get_slot_changes(definition, $$scope, dirty, fn) {
    if (definition[2] && fn) {
        const lets = definition[2](fn(dirty));
        if (typeof $$scope.dirty === 'object') {
            const merged = [];
            const len = Math.max($$scope.dirty.length, lets.length);
            for (let i = 0; i < len; i += 1) {
                merged[i] = $$scope.dirty[i] | lets[i];
            }
            return merged;
        }
        return $$scope.dirty | lets;
    }
    return $$scope.dirty;
}
function exclude_internal_props(props) {
    const result = {};
    for (const k in props)
        if (k[0] !== '$')
            result[k] = props[k];
    return result;
}
function once(fn) {
    let ran = false;
    return function (...args) {
        if (ran)
            return;
        ran = true;
        fn.call(this, ...args);
    };
}
function null_to_empty(value) {
    return value == null ? '' : value;
}
function set_store_value(store, ret, value = ret) {
    store.set(value);
    return ret;
}
const has_prop = (obj, prop) => Object.prototype.hasOwnProperty.call(obj, prop);
function action_destroyer(action_result) {
    return action_result && is_function(action_result.destroy) ? action_result.destroy : noop;
}

const is_client = typeof window !== 'undefined';
exports.now = is_client
    ? () => window.performance.now()
    : () => Date.now();
exports.raf = is_client ? cb => requestAnimationFrame(cb) : noop;
// used internally for testing
function set_now(fn) {
    exports.now = fn;
}
function set_raf(fn) {
    exports.raf = fn;
}

const tasks = new Set();
function run_tasks(now) {
    tasks.forEach(task => {
        if (!task.c(now)) {
            tasks.delete(task);
            task.f();
        }
    });
    if (tasks.size !== 0)
        exports.raf(run_tasks);
}
/**
 * For testing purposes only!
 */
function clear_loops() {
    tasks.clear();
}
/**
 * Creates a new task that runs on each raf frame
 * until it returns a falsy value or is aborted
 */
function loop(callback) {
    let task;
    if (tasks.size === 0)
        exports.raf(run_tasks);
    return {
        promise: new Promise(fulfill => {
            tasks.add(task = { c: callback, f: fulfill });
        }),
        abort() {
            tasks.delete(task);
        }
    };
}

function append(target, node) {
    target.appendChild(node);
}
function insert(target, node, anchor) {
    target.insertBefore(node, anchor || null);
}
function detach(node) {
    node.parentNode.removeChild(node);
}
function destroy_each(iterations, detaching) {
    for (let i = 0; i < iterations.length; i += 1) {
        if (iterations[i])
            iterations[i].d(detaching);
    }
}
function element(name) {
    return document.createElement(name);
}
function element_is(name, is) {
    return document.createElement(name, { is });
}
function object_without_properties(obj, exclude) {
    const target = {};
    for (const k in obj) {
        if (has_prop(obj, k)
            // @ts-ignore
            && exclude.indexOf(k) === -1) {
            // @ts-ignore
            target[k] = obj[k];
        }
    }
    return target;
}
function svg_element(name) {
    return document.createElementNS('http://www.w3.org/2000/svg', name);
}
function text(data) {
    return document.createTextNode(data);
}
function space() {
    return text(' ');
}
function empty() {
    return text('');
}
function listen(node, event, handler, options) {
    node.addEventListener(event, handler, options);
    return () => node.removeEventListener(event, handler, options);
}
function prevent_default(fn) {
    return function (event) {
        event.preventDefault();
        // @ts-ignore
        return fn.call(this, event);
    };
}
function stop_propagation(fn) {
    return function (event) {
        event.stopPropagation();
        // @ts-ignore
        return fn.call(this, event);
    };
}
function self(fn) {
    return function (event) {
        // @ts-ignore
        if (event.target === this)
            fn.call(this, event);
    };
}
function attr(node, attribute, value) {
    if (value == null)
        node.removeAttribute(attribute);
    else if (node.getAttribute(attribute) !== value)
        node.setAttribute(attribute, value);
}
function set_attributes(node, attributes) {
    // @ts-ignore
    const descriptors = Object.getOwnPropertyDescriptors(node.__proto__);
    for (const key in attributes) {
        if (attributes[key] == null) {
            node.removeAttribute(key);
        }
        else if (key === 'style') {
            node.style.cssText = attributes[key];
        }
        else if (descriptors[key] && descriptors[key].set) {
            node[key] = attributes[key];
        }
        else {
            attr(node, key, attributes[key]);
        }
    }
}
function set_svg_attributes(node, attributes) {
    for (const key in attributes) {
        attr(node, key, attributes[key]);
    }
}
function set_custom_element_data(node, prop, value) {
    if (prop in node) {
        node[prop] = value;
    }
    else {
        attr(node, prop, value);
    }
}
function xlink_attr(node, attribute, value) {
    node.setAttributeNS('http://www.w3.org/1999/xlink', attribute, value);
}
function get_binding_group_value(group) {
    const value = [];
    for (let i = 0; i < group.length; i += 1) {
        if (group[i].checked)
            value.push(group[i].__value);
    }
    return value;
}
function to_number(value) {
    return value === '' ? undefined : +value;
}
function time_ranges_to_array(ranges) {
    const array = [];
    for (let i = 0; i < ranges.length; i += 1) {
        array.push({ start: ranges.start(i), end: ranges.end(i) });
    }
    return array;
}
function children(element) {
    return Array.from(element.childNodes);
}
function claim_element(nodes, name, attributes, svg) {
    for (let i = 0; i < nodes.length; i += 1) {
        const node = nodes[i];
        if (node.nodeName === name) {
            for (let j = 0; j < node.attributes.length; j += 1) {
                const attribute = node.attributes[j];
                if (!attributes[attribute.name])
                    node.removeAttribute(attribute.name);
            }
            return nodes.splice(i, 1)[0]; // TODO strip unwanted attributes
        }
    }
    return svg ? svg_element(name) : element(name);
}
function claim_text(nodes, data) {
    for (let i = 0; i < nodes.length; i += 1) {
        const node = nodes[i];
        if (node.nodeType === 3) {
            node.data = '' + data;
            return nodes.splice(i, 1)[0];
        }
    }
    return text(data);
}
function claim_space(nodes) {
    return claim_text(nodes, ' ');
}
function set_data(text, data) {
    data = '' + data;
    if (text.data !== data)
        text.data = data;
}
function set_input_value(input, value) {
    if (value != null || input.value) {
        input.value = value;
    }
}
function set_input_type(input, type) {
    try {
        input.type = type;
    }
    catch (e) {
        // do nothing
    }
}
function set_style(node, key, value, important) {
    node.style.setProperty(key, value, important ? 'important' : '');
}
function select_option(select, value) {
    for (let i = 0; i < select.options.length; i += 1) {
        const option = select.options[i];
        if (option.__value === value) {
            option.selected = true;
            return;
        }
    }
}
function select_options(select, value) {
    for (let i = 0; i < select.options.length; i += 1) {
        const option = select.options[i];
        option.selected = ~value.indexOf(option.__value);
    }
}
function select_value(select) {
    const selected_option = select.querySelector(':checked') || select.options[0];
    return selected_option && selected_option.__value;
}
function select_multiple_value(select) {
    return [].map.call(select.querySelectorAll(':checked'), option => option.__value);
}
function add_resize_listener(element, fn) {
    if (getComputedStyle(element).position === 'static') {
        element.style.position = 'relative';
    }
    const object = document.createElement('object');
    object.setAttribute('style', 'display: block; position: absolute; top: 0; left: 0; height: 100%; width: 100%; overflow: hidden; pointer-events: none; z-index: -1;');
    object.setAttribute('aria-hidden', 'true');
    object.type = 'text/html';
    object.tabIndex = -1;
    let win;
    object.onload = () => {
        win = object.contentDocument.defaultView;
        win.addEventListener('resize', fn);
    };
    if (/Trident/.test(navigator.userAgent)) {
        element.appendChild(object);
        object.data = 'about:blank';
    }
    else {
        object.data = 'about:blank';
        element.appendChild(object);
    }
    return {
        cancel: () => {
            win && win.removeEventListener && win.removeEventListener('resize', fn);
            element.removeChild(object);
        }
    };
}
function toggle_class(element, name, toggle) {
    element.classList[toggle ? 'add' : 'remove'](name);
}
function custom_event(type, detail) {
    const e = document.createEvent('CustomEvent');
    e.initCustomEvent(type, false, false, detail);
    return e;
}
class HtmlTag {
    constructor(html, anchor = null) {
        this.e = element('div');
        this.a = anchor;
        this.u(html);
    }
    m(target, anchor = null) {
        for (let i = 0; i < this.n.length; i += 1) {
            insert(target, this.n[i], anchor);
        }
        this.t = target;
    }
    u(html) {
        this.e.innerHTML = html;
        this.n = Array.from(this.e.childNodes);
    }
    p(html) {
        this.d();
        this.u(html);
        this.m(this.t, this.a);
    }
    d() {
        this.n.forEach(detach);
    }
}

let stylesheet;
let active = 0;
let current_rules = {};
// https://github.com/darkskyapp/string-hash/blob/master/index.js
function hash(str) {
    let hash = 5381;
    let i = str.length;
    while (i--)
        hash = ((hash << 5) - hash) ^ str.charCodeAt(i);
    return hash >>> 0;
}
function create_rule(node, a, b, duration, delay, ease, fn, uid = 0) {
    const step = 16.666 / duration;
    let keyframes = '{\n';
    for (let p = 0; p <= 1; p += step) {
        const t = a + (b - a) * ease(p);
        keyframes += p * 100 + `%{${fn(t, 1 - t)}}\n`;
    }
    const rule = keyframes + `100% {${fn(b, 1 - b)}}\n}`;
    const name = `__svelte_${hash(rule)}_${uid}`;
    if (!current_rules[name]) {
        if (!stylesheet) {
            const style = element('style');
            document.head.appendChild(style);
            stylesheet = style.sheet;
        }
        current_rules[name] = true;
        stylesheet.insertRule(`@keyframes ${name} ${rule}`, stylesheet.cssRules.length);
    }
    const animation = node.style.animation || '';
    node.style.animation = `${animation ? `${animation}, ` : ``}${name} ${duration}ms linear ${delay}ms 1 both`;
    active += 1;
    return name;
}
function delete_rule(node, name) {
    node.style.animation = (node.style.animation || '')
        .split(', ')
        .filter(name
        ? anim => anim.indexOf(name) < 0 // remove specific animation
        : anim => anim.indexOf('__svelte') === -1 // remove all Svelte animations
    )
        .join(', ');
    if (name && !--active)
        clear_rules();
}
function clear_rules() {
    exports.raf(() => {
        if (active)
            return;
        let i = stylesheet.cssRules.length;
        while (i--)
            stylesheet.deleteRule(i);
        current_rules = {};
    });
}

function create_animation(node, from, fn, params) {
    if (!from)
        return noop;
    const to = node.getBoundingClientRect();
    if (from.left === to.left && from.right === to.right && from.top === to.top && from.bottom === to.bottom)
        return noop;
    const { delay = 0, duration = 300, easing = identity, 
    // @ts-ignore todo: should this be separated from destructuring? Or start/end added to public api and documentation?
    start: start_time = exports.now() + delay, 
    // @ts-ignore todo:
    end = start_time + duration, tick = noop, css } = fn(node, { from, to }, params);
    let running = true;
    let started = false;
    let name;
    function start() {
        if (css) {
            name = create_rule(node, 0, 1, duration, delay, easing, css);
        }
        if (!delay) {
            started = true;
        }
    }
    function stop() {
        if (css)
            delete_rule(node, name);
        running = false;
    }
    loop(now => {
        if (!started && now >= start_time) {
            started = true;
        }
        if (started && now >= end) {
            tick(1, 0);
            stop();
        }
        if (!running) {
            return false;
        }
        if (started) {
            const p = now - start_time;
            const t = 0 + 1 * easing(p / duration);
            tick(t, 1 - t);
        }
        return true;
    });
    start();
    tick(0, 1);
    return stop;
}
function fix_position(node) {
    const style = getComputedStyle(node);
    if (style.position !== 'absolute' && style.position !== 'fixed') {
        const { width, height } = style;
        const a = node.getBoundingClientRect();
        node.style.position = 'absolute';
        node.style.width = width;
        node.style.height = height;
        add_transform(node, a);
    }
}
function add_transform(node, a) {
    const b = node.getBoundingClientRect();
    if (a.left !== b.left || a.top !== b.top) {
        const style = getComputedStyle(node);
        const transform = style.transform === 'none' ? '' : style.transform;
        node.style.transform = `${transform} translate(${a.left - b.left}px, ${a.top - b.top}px)`;
    }
}

function set_current_component(component) {
    exports.current_component = component;
}
function get_current_component() {
    if (!exports.current_component)
        throw new Error(`Function called outside component initialization`);
    return exports.current_component;
}
function beforeUpdate(fn) {
    get_current_component().$$.before_update.push(fn);
}
function onMount(fn) {
    get_current_component().$$.on_mount.push(fn);
}
function afterUpdate(fn) {
    get_current_component().$$.after_update.push(fn);
}
function onDestroy(fn) {
    get_current_component().$$.on_destroy.push(fn);
}
function createEventDispatcher() {
    const component = get_current_component();
    return (type, detail) => {
        const callbacks = component.$$.callbacks[type];
        if (callbacks) {
            // TODO are there situations where events could be dispatched
            // in a server (non-DOM) environment?
            const event = custom_event(type, detail);
            callbacks.slice().forEach(fn => {
                fn.call(component, event);
            });
        }
    };
}
function setContext(key, context) {
    get_current_component().$$.context.set(key, context);
}
function getContext(key) {
    return get_current_component().$$.context.get(key);
}
// TODO figure out if we still want to support
// shorthand events, or if we want to implement
// a real bubbling mechanism
function bubble(component, event) {
    const callbacks = component.$$.callbacks[event.type];
    if (callbacks) {
        callbacks.slice().forEach(fn => fn(event));
    }
}

const dirty_components = [];
const intros = { enabled: false };
const binding_callbacks = [];
const render_callbacks = [];
const flush_callbacks = [];
const resolved_promise = Promise.resolve();
let update_scheduled = false;
function schedule_update() {
    if (!update_scheduled) {
        update_scheduled = true;
        resolved_promise.then(flush);
    }
}
function tick() {
    schedule_update();
    return resolved_promise;
}
function add_render_callback(fn) {
    render_callbacks.push(fn);
}
function add_flush_callback(fn) {
    flush_callbacks.push(fn);
}
function flush() {
    const seen_callbacks = new Set();
    do {
        // first, call beforeUpdate functions
        // and update components
        while (dirty_components.length) {
            const component = dirty_components.shift();
            set_current_component(component);
            update(component.$$);
        }
        while (binding_callbacks.length)
            binding_callbacks.pop()();
        // then, once components are updated, call
        // afterUpdate functions. This may cause
        // subsequent updates...
        for (let i = 0; i < render_callbacks.length; i += 1) {
            const callback = render_callbacks[i];
            if (!seen_callbacks.has(callback)) {
                callback();
                // ...so guard against infinite loops
                seen_callbacks.add(callback);
            }
        }
        render_callbacks.length = 0;
    } while (dirty_components.length);
    while (flush_callbacks.length) {
        flush_callbacks.pop()();
    }
    update_scheduled = false;
}
function update($$) {
    if ($$.fragment !== null) {
        $$.update();
        run_all($$.before_update);
        const dirty = $$.dirty;
        $$.dirty = [-1];
        $$.fragment && $$.fragment.p($$.ctx, dirty);
        $$.after_update.forEach(add_render_callback);
    }
}

let promise;
function wait() {
    if (!promise) {
        promise = Promise.resolve();
        promise.then(() => {
            promise = null;
        });
    }
    return promise;
}
function dispatch(node, direction, kind) {
    node.dispatchEvent(custom_event(`${direction ? 'intro' : 'outro'}${kind}`));
}
const outroing = new Set();
let outros;
function group_outros() {
    outros = {
        r: 0,
        c: [],
        p: outros // parent group
    };
}
function check_outros() {
    if (!outros.r) {
        run_all(outros.c);
    }
    outros = outros.p;
}
function transition_in(block, local) {
    if (block && block.i) {
        outroing.delete(block);
        block.i(local);
    }
}
function transition_out(block, local, detach, callback) {
    if (block && block.o) {
        if (outroing.has(block))
            return;
        outroing.add(block);
        outros.c.push(() => {
            outroing.delete(block);
            if (callback) {
                if (detach)
                    block.d(1);
                callback();
            }
        });
        block.o(local);
    }
}
const null_transition = { duration: 0 };
function create_in_transition(node, fn, params) {
    let config = fn(node, params);
    let running = false;
    let animation_name;
    let task;
    let uid = 0;
    function cleanup() {
        if (animation_name)
            delete_rule(node, animation_name);
    }
    function go() {
        const { delay = 0, duration = 300, easing = identity, tick = noop, css } = config || null_transition;
        if (css)
            animation_name = create_rule(node, 0, 1, duration, delay, easing, css, uid++);
        tick(0, 1);
        const start_time = exports.now() + delay;
        const end_time = start_time + duration;
        if (task)
            task.abort();
        running = true;
        add_render_callback(() => dispatch(node, true, 'start'));
        task = loop(now => {
            if (running) {
                if (now >= end_time) {
                    tick(1, 0);
                    dispatch(node, true, 'end');
                    cleanup();
                    return running = false;
                }
                if (now >= start_time) {
                    const t = easing((now - start_time) / duration);
                    tick(t, 1 - t);
                }
            }
            return running;
        });
    }
    let started = false;
    return {
        start() {
            if (started)
                return;
            delete_rule(node);
            if (is_function(config)) {
                config = config();
                wait().then(go);
            }
            else {
                go();
            }
        },
        invalidate() {
            started = false;
        },
        end() {
            if (running) {
                cleanup();
                running = false;
            }
        }
    };
}
function create_out_transition(node, fn, params) {
    let config = fn(node, params);
    let running = true;
    let animation_name;
    const group = outros;
    group.r += 1;
    function go() {
        const { delay = 0, duration = 300, easing = identity, tick = noop, css } = config || null_transition;
        if (css)
            animation_name = create_rule(node, 1, 0, duration, delay, easing, css);
        const start_time = exports.now() + delay;
        const end_time = start_time + duration;
        add_render_callback(() => dispatch(node, false, 'start'));
        loop(now => {
            if (running) {
                if (now >= end_time) {
                    tick(0, 1);
                    dispatch(node, false, 'end');
                    if (!--group.r) {
                        // this will result in `end()` being called,
                        // so we don't need to clean up here
                        run_all(group.c);
                    }
                    return false;
                }
                if (now >= start_time) {
                    const t = easing((now - start_time) / duration);
                    tick(1 - t, t);
                }
            }
            return running;
        });
    }
    if (is_function(config)) {
        wait().then(() => {
            // @ts-ignore
            config = config();
            go();
        });
    }
    else {
        go();
    }
    return {
        end(reset) {
            if (reset && config.tick) {
                config.tick(1, 0);
            }
            if (running) {
                if (animation_name)
                    delete_rule(node, animation_name);
                running = false;
            }
        }
    };
}
function create_bidirectional_transition(node, fn, params, intro) {
    let config = fn(node, params);
    let t = intro ? 0 : 1;
    let running_program = null;
    let pending_program = null;
    let animation_name = null;
    function clear_animation() {
        if (animation_name)
            delete_rule(node, animation_name);
    }
    function init(program, duration) {
        const d = program.b - t;
        duration *= Math.abs(d);
        return {
            a: t,
            b: program.b,
            d,
            duration,
            start: program.start,
            end: program.start + duration,
            group: program.group
        };
    }
    function go(b) {
        const { delay = 0, duration = 300, easing = identity, tick = noop, css } = config || null_transition;
        const program = {
            start: exports.now() + delay,
            b
        };
        if (!b) {
            // @ts-ignore todo: improve typings
            program.group = outros;
            outros.r += 1;
        }
        if (running_program) {
            pending_program = program;
        }
        else {
            // if this is an intro, and there's a delay, we need to do
            // an initial tick and/or apply CSS animation immediately
            if (css) {
                clear_animation();
                animation_name = create_rule(node, t, b, duration, delay, easing, css);
            }
            if (b)
                tick(0, 1);
            running_program = init(program, duration);
            add_render_callback(() => dispatch(node, b, 'start'));
            loop(now => {
                if (pending_program && now > pending_program.start) {
                    running_program = init(pending_program, duration);
                    pending_program = null;
                    dispatch(node, running_program.b, 'start');
                    if (css) {
                        clear_animation();
                        animation_name = create_rule(node, t, running_program.b, running_program.duration, 0, easing, config.css);
                    }
                }
                if (running_program) {
                    if (now >= running_program.end) {
                        tick(t = running_program.b, 1 - t);
                        dispatch(node, running_program.b, 'end');
                        if (!pending_program) {
                            // we're done
                            if (running_program.b) {
                                // intro — we can tidy up immediately
                                clear_animation();
                            }
                            else {
                                // outro — needs to be coordinated
                                if (!--running_program.group.r)
                                    run_all(running_program.group.c);
                            }
                        }
                        running_program = null;
                    }
                    else if (now >= running_program.start) {
                        const p = now - running_program.start;
                        t = running_program.a + running_program.d * easing(p / running_program.duration);
                        tick(t, 1 - t);
                    }
                }
                return !!(running_program || pending_program);
            });
        }
    }
    return {
        run(b) {
            if (is_function(config)) {
                wait().then(() => {
                    // @ts-ignore
                    config = config();
                    go(b);
                });
            }
            else {
                go(b);
            }
        },
        end() {
            clear_animation();
            running_program = pending_program = null;
        }
    };
}

function handle_promise(promise, info) {
    const token = info.token = {};
    function update(type, index, key, value) {
        if (info.token !== token)
            return;
        info.resolved = value;
        let child_ctx = info.ctx;
        if (key !== undefined) {
            child_ctx = child_ctx.slice();
            child_ctx[key] = value;
        }
        const block = type && (info.current = type)(child_ctx);
        let needs_flush = false;
        if (info.block) {
            if (info.blocks) {
                info.blocks.forEach((block, i) => {
                    if (i !== index && block) {
                        group_outros();
                        transition_out(block, 1, 1, () => {
                            info.blocks[i] = null;
                        });
                        check_outros();
                    }
                });
            }
            else {
                info.block.d(1);
            }
            block.c();
            transition_in(block, 1);
            block.m(info.mount(), info.anchor);
            needs_flush = true;
        }
        info.block = block;
        if (info.blocks)
            info.blocks[index] = block;
        if (needs_flush) {
            flush();
        }
    }
    if (is_promise(promise)) {
        const current_component = get_current_component();
        promise.then(value => {
            set_current_component(current_component);
            update(info.then, 1, info.value, value);
            set_current_component(null);
        }, error => {
            set_current_component(current_component);
            update(info.catch, 2, info.error, error);
            set_current_component(null);
        });
        // if we previously had a then/catch block, destroy it
        if (info.current !== info.pending) {
            update(info.pending, 0);
            return true;
        }
    }
    else {
        if (info.current !== info.then) {
            update(info.then, 1, info.value, promise);
            return true;
        }
        info.resolved = promise;
    }
}

const globals = (typeof window !== 'undefined' ? window : global);

function destroy_block(block, lookup) {
    block.d(1);
    lookup.delete(block.key);
}
function outro_and_destroy_block(block, lookup) {
    transition_out(block, 1, 1, () => {
        lookup.delete(block.key);
    });
}
function fix_and_destroy_block(block, lookup) {
    block.f();
    destroy_block(block, lookup);
}
function fix_and_outro_and_destroy_block(block, lookup) {
    block.f();
    outro_and_destroy_block(block, lookup);
}
function update_keyed_each(old_blocks, dirty, get_key, dynamic, ctx, list, lookup, node, destroy, create_each_block, next, get_context) {
    let o = old_blocks.length;
    let n = list.length;
    let i = o;
    const old_indexes = {};
    while (i--)
        old_indexes[old_blocks[i].key] = i;
    const new_blocks = [];
    const new_lookup = new Map();
    const deltas = new Map();
    i = n;
    while (i--) {
        const child_ctx = get_context(ctx, list, i);
        const key = get_key(child_ctx);
        let block = lookup.get(key);
        if (!block) {
            block = create_each_block(key, child_ctx);
            block.c();
        }
        else if (dynamic) {
            block.p(child_ctx, dirty);
        }
        new_lookup.set(key, new_blocks[i] = block);
        if (key in old_indexes)
            deltas.set(key, Math.abs(i - old_indexes[key]));
    }
    const will_move = new Set();
    const did_move = new Set();
    function insert(block) {
        transition_in(block, 1);
        block.m(node, next);
        lookup.set(block.key, block);
        next = block.first;
        n--;
    }
    while (o && n) {
        const new_block = new_blocks[n - 1];
        const old_block = old_blocks[o - 1];
        const new_key = new_block.key;
        const old_key = old_block.key;
        if (new_block === old_block) {
            // do nothing
            next = new_block.first;
            o--;
            n--;
        }
        else if (!new_lookup.has(old_key)) {
            // remove old block
            destroy(old_block, lookup);
            o--;
        }
        else if (!lookup.has(new_key) || will_move.has(new_key)) {
            insert(new_block);
        }
        else if (did_move.has(old_key)) {
            o--;
        }
        else if (deltas.get(new_key) > deltas.get(old_key)) {
            did_move.add(new_key);
            insert(new_block);
        }
        else {
            will_move.add(old_key);
            o--;
        }
    }
    while (o--) {
        const old_block = old_blocks[o];
        if (!new_lookup.has(old_block.key))
            destroy(old_block, lookup);
    }
    while (n)
        insert(new_blocks[n - 1]);
    return new_blocks;
}
function measure(blocks) {
    const rects = {};
    let i = blocks.length;
    while (i--)
        rects[blocks[i].key] = blocks[i].node.getBoundingClientRect();
    return rects;
}

function get_spread_update(levels, updates) {
    const update = {};
    const to_null_out = {};
    const accounted_for = { $$scope: 1 };
    let i = levels.length;
    while (i--) {
        const o = levels[i];
        const n = updates[i];
        if (n) {
            for (const key in o) {
                if (!(key in n))
                    to_null_out[key] = 1;
            }
            for (const key in n) {
                if (!accounted_for[key]) {
                    update[key] = n[key];
                    accounted_for[key] = 1;
                }
            }
            levels[i] = n;
        }
        else {
            for (const key in o) {
                accounted_for[key] = 1;
            }
        }
    }
    for (const key in to_null_out) {
        if (!(key in update))
            update[key] = undefined;
    }
    return update;
}
function get_spread_object(spread_props) {
    return typeof spread_props === 'object' && spread_props !== null ? spread_props : {};
}

// source: https://html.spec.whatwg.org/multipage/indices.html
const boolean_attributes = new Set([
    'allowfullscreen',
    'allowpaymentrequest',
    'async',
    'autofocus',
    'autoplay',
    'checked',
    'controls',
    'default',
    'defer',
    'disabled',
    'formnovalidate',
    'hidden',
    'ismap',
    'loop',
    'multiple',
    'muted',
    'nomodule',
    'novalidate',
    'open',
    'playsinline',
    'readonly',
    'required',
    'reversed',
    'selected'
]);

const invalid_attribute_name_character = /[\s'">/=\u{FDD0}-\u{FDEF}\u{FFFE}\u{FFFF}\u{1FFFE}\u{1FFFF}\u{2FFFE}\u{2FFFF}\u{3FFFE}\u{3FFFF}\u{4FFFE}\u{4FFFF}\u{5FFFE}\u{5FFFF}\u{6FFFE}\u{6FFFF}\u{7FFFE}\u{7FFFF}\u{8FFFE}\u{8FFFF}\u{9FFFE}\u{9FFFF}\u{AFFFE}\u{AFFFF}\u{BFFFE}\u{BFFFF}\u{CFFFE}\u{CFFFF}\u{DFFFE}\u{DFFFF}\u{EFFFE}\u{EFFFF}\u{FFFFE}\u{FFFFF}\u{10FFFE}\u{10FFFF}]/u;
// https://html.spec.whatwg.org/multipage/syntax.html#attributes-2
// https://infra.spec.whatwg.org/#noncharacter
function spread(args, classes_to_add) {
    const attributes = Object.assign({}, ...args);
    if (classes_to_add) {
        if (attributes.class == null) {
            attributes.class = classes_to_add;
        }
        else {
            attributes.class += ' ' + classes_to_add;
        }
    }
    let str = '';
    Object.keys(attributes).forEach(name => {
        if (invalid_attribute_name_character.test(name))
            return;
        const value = attributes[name];
        if (value === true)
            str += " " + name;
        else if (boolean_attributes.has(name.toLowerCase())) {
            if (value)
                str += " " + name;
        }
        else if (value != null) {
            str += " " + name + "=" + JSON.stringify(String(value)
                .replace(/"/g, '&#34;')
                .replace(/'/g, '&#39;'));
        }
    });
    return str;
}
const escaped = {
    '"': '&quot;',
    "'": '&#39;',
    '&': '&amp;',
    '<': '&lt;',
    '>': '&gt;'
};
function escape(html) {
    return String(html).replace(/["'&<>]/g, match => escaped[match]);
}
function each(items, fn) {
    let str = '';
    for (let i = 0; i < items.length; i += 1) {
        str += fn(items[i], i);
    }
    return str;
}
const missing_component = {
    $$render: () => ''
};
function validate_component(component, name) {
    if (!component || !component.$$render) {
        if (name === 'svelte:component')
            name += ' this={...}';
        throw new Error(`<${name}> is not a valid SSR component. You may need to review your build config to ensure that dependencies are compiled, rather than imported as pre-compiled modules`);
    }
    return component;
}
function debug(file, line, column, values) {
    console.log(`{@debug} ${file ? file + ' ' : ''}(${line}:${column})`); // eslint-disable-line no-console
    console.log(values); // eslint-disable-line no-console
    return '';
}
let on_destroy;
function create_ssr_component(fn) {
    function $$render(result, props, bindings, slots) {
        const parent_component = exports.current_component;
        const $$ = {
            on_destroy,
            context: new Map(parent_component ? parent_component.$$.context : []),
            // these will be immediately discarded
            on_mount: [],
            before_update: [],
            after_update: [],
            callbacks: blank_object()
        };
        set_current_component({ $$ });
        const html = fn(result, props, bindings, slots);
        set_current_component(parent_component);
        return html;
    }
    return {
        render: (props = {}, options = {}) => {
            on_destroy = [];
            const result = { head: '', css: new Set() };
            const html = $$render(result, props, {}, options);
            run_all(on_destroy);
            return {
                html,
                css: {
                    code: Array.from(result.css).map(css => css.code).join('\n'),
                    map: null // TODO
                },
                head: result.head
            };
        },
        $$render
    };
}
function add_attribute(name, value, boolean) {
    if (value == null || (boolean && !value))
        return '';
    return ` ${name}${value === true ? '' : `=${typeof value === 'string' ? JSON.stringify(escape(value)) : `"${value}"`}`}`;
}
function add_classes(classes) {
    return classes ? ` class="${classes}"` : ``;
}

function bind(component, name, callback) {
    const index = component.$$.props[name];
    if (index !== undefined) {
        component.$$.bound[index] = callback;
        callback(component.$$.ctx[index]);
    }
}
function create_component(block) {
    block && block.c();
}
function claim_component(block, parent_nodes) {
    block && block.l(parent_nodes);
}
function mount_component(component, target, anchor) {
    const { fragment, on_mount, on_destroy, after_update } = component.$$;
    fragment && fragment.m(target, anchor);
    // onMount happens before the initial afterUpdate
    add_render_callback(() => {
        const new_on_destroy = on_mount.map(run).filter(is_function);
        if (on_destroy) {
            on_destroy.push(...new_on_destroy);
        }
        else {
            // Edge case - component was destroyed immediately,
            // most likely as a result of a binding initialising
            run_all(new_on_destroy);
        }
        component.$$.on_mount = [];
    });
    after_update.forEach(add_render_callback);
}
function destroy_component(component, detaching) {
    const $$ = component.$$;
    if ($$.fragment !== null) {
        run_all($$.on_destroy);
        $$.fragment && $$.fragment.d(detaching);
        // TODO null out other refs, including component.$$ (but need to
        // preserve final state?)
        $$.on_destroy = $$.fragment = null;
        $$.ctx = [];
    }
}
function make_dirty(component, i) {
    if (component.$$.dirty[0] === -1) {
        dirty_components.push(component);
        schedule_update();
        component.$$.dirty.fill(0);
    }
    component.$$.dirty[(i / 31) | 0] |= (1 << (i % 31));
}
function init(component, options, instance, create_fragment, not_equal, props, dirty = [-1]) {
    const parent_component = exports.current_component;
    set_current_component(component);
    const prop_values = options.props || {};
    const $$ = component.$$ = {
        fragment: null,
        ctx: null,
        // state
        props,
        update: noop,
        not_equal,
        bound: blank_object(),
        // lifecycle
        on_mount: [],
        on_destroy: [],
        before_update: [],
        after_update: [],
        context: new Map(parent_component ? parent_component.$$.context : []),
        // everything else
        callbacks: blank_object(),
        dirty
    };
    let ready = false;
    $$.ctx = instance
        ? instance(component, prop_values, (i, ret, value = ret) => {
            if ($$.ctx && not_equal($$.ctx[i], $$.ctx[i] = value)) {
                if ($$.bound[i])
                    $$.bound[i](value);
                if (ready)
                    make_dirty(component, i);
            }
            return ret;
        })
        : [];
    $$.update();
    ready = true;
    run_all($$.before_update);
    // `false` as a special case of no DOM component
    $$.fragment = create_fragment ? create_fragment($$.ctx) : false;
    if (options.target) {
        if (options.hydrate) {
            // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
            $$.fragment && $$.fragment.l(children(options.target));
        }
        else {
            // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
            $$.fragment && $$.fragment.c();
        }
        if (options.intro)
            transition_in(component.$$.fragment);
        mount_component(component, options.target, options.anchor);
        flush();
    }
    set_current_component(parent_component);
}
if (typeof HTMLElement === 'function') {
    exports.SvelteElement = class extends HTMLElement {
        constructor() {
            super();
            this.attachShadow({ mode: 'open' });
        }
        connectedCallback() {
            // @ts-ignore todo: improve typings
            for (const key in this.$$.slotted) {
                // @ts-ignore todo: improve typings
                this.appendChild(this.$$.slotted[key]);
            }
        }
        attributeChangedCallback(attr, _oldValue, newValue) {
            this[attr] = newValue;
        }
        $destroy() {
            destroy_component(this, 1);
            this.$destroy = noop;
        }
        $on(type, callback) {
            // TODO should this delegate to addEventListener?
            const callbacks = (this.$$.callbacks[type] || (this.$$.callbacks[type] = []));
            callbacks.push(callback);
            return () => {
                const index = callbacks.indexOf(callback);
                if (index !== -1)
                    callbacks.splice(index, 1);
            };
        }
        $set() {
            // overridden by instance, if it has props
        }
    };
}
class SvelteComponent {
    $destroy() {
        destroy_component(this, 1);
        this.$destroy = noop;
    }
    $on(type, callback) {
        const callbacks = (this.$$.callbacks[type] || (this.$$.callbacks[type] = []));
        callbacks.push(callback);
        return () => {
            const index = callbacks.indexOf(callback);
            if (index !== -1)
                callbacks.splice(index, 1);
        };
    }
    $set() {
        // overridden by instance, if it has props
    }
}

function dispatch_dev(type, detail) {
    document.dispatchEvent(custom_event(type, detail));
}
function append_dev(target, node) {
    dispatch_dev("SvelteDOMInsert", { target, node });
    append(target, node);
}
function insert_dev(target, node, anchor) {
    dispatch_dev("SvelteDOMInsert", { target, node, anchor });
    insert(target, node, anchor);
}
function detach_dev(node) {
    dispatch_dev("SvelteDOMRemove", { node });
    detach(node);
}
function detach_between_dev(before, after) {
    while (before.nextSibling && before.nextSibling !== after) {
        detach_dev(before.nextSibling);
    }
}
function detach_before_dev(after) {
    while (after.previousSibling) {
        detach_dev(after.previousSibling);
    }
}
function detach_after_dev(before) {
    while (before.nextSibling) {
        detach_dev(before.nextSibling);
    }
}
function listen_dev(node, event, handler, options, has_prevent_default, has_stop_propagation) {
    const modifiers = options === true ? ["capture"] : options ? Array.from(Object.keys(options)) : [];
    if (has_prevent_default)
        modifiers.push('preventDefault');
    if (has_stop_propagation)
        modifiers.push('stopPropagation');
    dispatch_dev("SvelteDOMAddEventListener", { node, event, handler, modifiers });
    const dispose = listen(node, event, handler, options);
    return () => {
        dispatch_dev("SvelteDOMRemoveEventListener", { node, event, handler, modifiers });
        dispose();
    };
}
function attr_dev(node, attribute, value) {
    attr(node, attribute, value);
    if (value == null)
        dispatch_dev("SvelteDOMRemoveAttribute", { node, attribute });
    else
        dispatch_dev("SvelteDOMSetAttribute", { node, attribute, value });
}
function prop_dev(node, property, value) {
    node[property] = value;
    dispatch_dev("SvelteDOMSetProperty", { node, property, value });
}
function dataset_dev(node, property, value) {
    node.dataset[property] = value;
    dispatch_dev("SvelteDOMSetDataset", { node, property, value });
}
function set_data_dev(text, data) {
    data = '' + data;
    if (text.data === data)
        return;
    dispatch_dev("SvelteDOMSetData", { node: text, data });
    text.data = data;
}
class SvelteComponentDev extends SvelteComponent {
    constructor(options) {
        if (!options || (!options.target && !options.$$inline)) {
            throw new Error(`'target' is a required option`);
        }
        super();
    }
    $destroy() {
        super.$destroy();
        this.$destroy = () => {
            console.warn(`Component was already destroyed`); // eslint-disable-line no-console
        };
    }
}
function loop_guard(timeout) {
    const start = Date.now();
    return () => {
        if (Date.now() - start > timeout) {
            throw new Error(`Infinite loop detected`);
        }
    };
}

exports.HtmlTag = HtmlTag;
exports.SvelteComponent = SvelteComponent;
exports.SvelteComponentDev = SvelteComponentDev;
exports.action_destroyer = action_destroyer;
exports.add_attribute = add_attribute;
exports.add_classes = add_classes;
exports.add_flush_callback = add_flush_callback;
exports.add_location = add_location;
exports.add_render_callback = add_render_callback;
exports.add_resize_listener = add_resize_listener;
exports.add_transform = add_transform;
exports.afterUpdate = afterUpdate;
exports.append = append;
exports.append_dev = append_dev;
exports.assign = assign;
exports.attr = attr;
exports.attr_dev = attr_dev;
exports.beforeUpdate = beforeUpdate;
exports.bind = bind;
exports.binding_callbacks = binding_callbacks;
exports.blank_object = blank_object;
exports.bubble = bubble;
exports.check_outros = check_outros;
exports.children = children;
exports.claim_component = claim_component;
exports.claim_element = claim_element;
exports.claim_space = claim_space;
exports.claim_text = claim_text;
exports.clear_loops = clear_loops;
exports.component_subscribe = component_subscribe;
exports.createEventDispatcher = createEventDispatcher;
exports.create_animation = create_animation;
exports.create_bidirectional_transition = create_bidirectional_transition;
exports.create_component = create_component;
exports.create_in_transition = create_in_transition;
exports.create_out_transition = create_out_transition;
exports.create_slot = create_slot;
exports.create_ssr_component = create_ssr_component;
exports.custom_event = custom_event;
exports.dataset_dev = dataset_dev;
exports.debug = debug;
exports.destroy_block = destroy_block;
exports.destroy_component = destroy_component;
exports.destroy_each = destroy_each;
exports.detach = detach;
exports.detach_after_dev = detach_after_dev;
exports.detach_before_dev = detach_before_dev;
exports.detach_between_dev = detach_between_dev;
exports.detach_dev = detach_dev;
exports.dirty_components = dirty_components;
exports.dispatch_dev = dispatch_dev;
exports.each = each;
exports.element = element;
exports.element_is = element_is;
exports.empty = empty;
exports.escape = escape;
exports.escaped = escaped;
exports.exclude_internal_props = exclude_internal_props;
exports.fix_and_destroy_block = fix_and_destroy_block;
exports.fix_and_outro_and_destroy_block = fix_and_outro_and_destroy_block;
exports.fix_position = fix_position;
exports.flush = flush;
exports.getContext = getContext;
exports.get_binding_group_value = get_binding_group_value;
exports.get_current_component = get_current_component;
exports.get_slot_changes = get_slot_changes;
exports.get_slot_context = get_slot_context;
exports.get_spread_object = get_spread_object;
exports.get_spread_update = get_spread_update;
exports.get_store_value = get_store_value;
exports.globals = globals;
exports.group_outros = group_outros;
exports.handle_promise = handle_promise;
exports.has_prop = has_prop;
exports.identity = identity;
exports.init = init;
exports.insert = insert;
exports.insert_dev = insert_dev;
exports.intros = intros;
exports.invalid_attribute_name_character = invalid_attribute_name_character;
exports.is_client = is_client;
exports.is_function = is_function;
exports.is_promise = is_promise;
exports.listen = listen;
exports.listen_dev = listen_dev;
exports.loop = loop;
exports.loop_guard = loop_guard;
exports.measure = measure;
exports.missing_component = missing_component;
exports.mount_component = mount_component;
exports.noop = noop;
exports.not_equal = not_equal;
exports.null_to_empty = null_to_empty;
exports.object_without_properties = object_without_properties;
exports.onDestroy = onDestroy;
exports.onMount = onMount;
exports.once = once;
exports.outro_and_destroy_block = outro_and_destroy_block;
exports.prevent_default = prevent_default;
exports.prop_dev = prop_dev;
exports.run = run;
exports.run_all = run_all;
exports.safe_not_equal = safe_not_equal;
exports.schedule_update = schedule_update;
exports.select_multiple_value = select_multiple_value;
exports.select_option = select_option;
exports.select_options = select_options;
exports.select_value = select_value;
exports.self = self;
exports.setContext = setContext;
exports.set_attributes = set_attributes;
exports.set_current_component = set_current_component;
exports.set_custom_element_data = set_custom_element_data;
exports.set_data = set_data;
exports.set_data_dev = set_data_dev;
exports.set_input_type = set_input_type;
exports.set_input_value = set_input_value;
exports.set_now = set_now;
exports.set_raf = set_raf;
exports.set_store_value = set_store_value;
exports.set_style = set_style;
exports.set_svg_attributes = set_svg_attributes;
exports.space = space;
exports.spread = spread;
exports.stop_propagation = stop_propagation;
exports.subscribe = subscribe;
exports.svg_element = svg_element;
exports.text = text;
exports.tick = tick;
exports.time_ranges_to_array = time_ranges_to_array;
exports.to_number = to_number;
exports.toggle_class = toggle_class;
exports.transition_in = transition_in;
exports.transition_out = transition_out;
exports.update_keyed_each = update_keyed_each;
exports.validate_component = validate_component;
exports.validate_store = validate_store;
exports.xlink_attr = xlink_attr;