mirror of
https://github.com/dillonkearns/elm-pages-v3-beta.git
synced 2024-12-27 05:44:17 +03:00
50 lines
2.1 KiB
JavaScript
50 lines
2.1 KiB
JavaScript
/**
|
|
* @license
|
|
* Copyright (c) 2016 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
|
|
* subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
|
|
*/
|
|
|
|
/**
|
|
* This shim allows elements written in, or compiled to, ES5 to work on native
|
|
* implementations of Custom Elements v1. It sets new.target to the value of
|
|
* this.constructor so that the native HTMLElement constructor can access the
|
|
* current under-construction element's definition.
|
|
*/
|
|
(function() {
|
|
if (
|
|
// No Reflect, no classes, no need for shim because native custom elements
|
|
// require ES2015 classes or Reflect.
|
|
window.Reflect === undefined ||
|
|
window.customElements === undefined ||
|
|
// The webcomponentsjs custom elements polyfill doesn't require
|
|
// ES2015-compatible construction (`super()` or `Reflect.construct`).
|
|
window.customElements.polyfillWrapFlushCallback
|
|
) {
|
|
return;
|
|
}
|
|
const BuiltInHTMLElement = HTMLElement;
|
|
/**
|
|
* With jscompiler's RECOMMENDED_FLAGS the function name will be optimized away.
|
|
* However, if we declare the function as a property on an object literal, and
|
|
* use quotes for the property name, then closure will leave that much intact,
|
|
* which is enough for the JS VM to correctly set Function.prototype.name.
|
|
*/
|
|
const wrapperForTheName = {
|
|
HTMLElement: /** @this {!Object} */ function HTMLElement() {
|
|
return Reflect.construct(
|
|
BuiltInHTMLElement,
|
|
[],
|
|
/** @type {!Function} */ (this.constructor)
|
|
);
|
|
}
|
|
};
|
|
window.HTMLElement = wrapperForTheName["HTMLElement"];
|
|
HTMLElement.prototype = BuiltInHTMLElement.prototype;
|
|
HTMLElement.prototype.constructor = HTMLElement;
|
|
Object.setPrototypeOf(HTMLElement, BuiltInHTMLElement);
|
|
})();
|