webdash-readme-preview/bower_components/polymer/lib/utils/flush.html

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@license
Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
Code distributed by Google as part of the polymer project is also
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-->
<link rel="import" href="boot.html">
<script>
(function() {
  'use strict';

  let debouncerQueue = [];

  /**
   * Adds a `Polymer.Debouncer` to a list of globally flushable tasks.
   *
   * @memberof Polymer
   * @param {!Polymer.Debouncer} debouncer Debouncer to enqueue
   * @return {void}
   */
  Polymer.enqueueDebouncer = function(debouncer) {
    debouncerQueue.push(debouncer);
  };

  function flushDebouncers() {
    const didFlush = Boolean(debouncerQueue.length);
    while (debouncerQueue.length) {
      try {
        debouncerQueue.shift().flush();
      } catch(e) {
        setTimeout(() => {
          throw e;
        });
      }
    }
    return didFlush;
  }

  /**
   * Forces several classes of asynchronously queued tasks to flush:
   * - Debouncers added via `enqueueDebouncer`
   * - ShadyDOM distribution
   *
   * @memberof Polymer
   * @return {void}
   */
  Polymer.flush = function() {
    let shadyDOM, debouncers;
    do {
      shadyDOM = window.ShadyDOM && ShadyDOM.flush();
      if (window.ShadyCSS && window.ShadyCSS.ScopingShim) {
        window.ShadyCSS.ScopingShim.flush();
      }
      debouncers = flushDebouncers();
    } while (shadyDOM || debouncers);
  };

})();
</script>