@adobe/coral-spectrum/coral-externals/polyfills/CustomEvent.js

Coral Spectrum is a JavaScript library of Web Components following Spectrum design patterns.

// Any copyright is dedicated to the Public Domain. http://creativecommons.org/publicdomain/zero/1.0/
// Source https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent/CustomEvent#Polyfill
(function () {

  if (typeof window.CustomEvent === "function") return false;

  function CustomEvent(event, params) {
    params = params || {bubbles: false, cancelable: false, detail: undefined};
    var evt = document.createEvent('CustomEvent');
    evt.initCustomEvent(event, params.bubbles, params.cancelable, params.detail);
    return evt;
  }

  CustomEvent.prototype = window.Event.prototype;

  window.CustomEvent = CustomEvent;
})();