| <!DOCTYPE html> |
| <!-- |
| TODO(yosin): We should upstream to wpt test. |
| This file is taken from https://github.com/kojiishi/web-platform-tests/blob/53908d773012edf931047674f7afe3975bc1820f/custom-elements/custom-elements-registry/get.html |
| --> |
| <title>Custom Elements: CustomElementRegistry.get</title> |
| <script src="../../../resources/testharness.js"></script> |
| <script src="../../../resources/testharnessreport.js"></script> |
| <body> |
| <div id="log"></div> |
| <script> |
| 'use strict'; |
| (() => { |
| // https://html.spec.whatwg.org/multipage/scripting.html#dom-customelementregistry-whendefined |
| // Use window from iframe to isolate the test. |
| function setup() { |
| const iframe = document.createElement('iframe'); |
| document.body.appendChild(iframe); |
| const testWindow = iframe.contentWindow; |
| const customElements = testWindow.customElements; |
| if (!customElements) |
| return Promise.reject('This test requires window.customElements'); |
| if (!('get' in customElements)) |
| return Promise.reject('This test requires window.customElements.get'); |
| return Promise.resolve(customElements); |
| } |
| |
| promise_test(() => setup() |
| .then(customElements => { |
| // 1. If this CustomElementRegistry contains an entry with name name, |
| // then return that entry's constructor. |
| const name = 'test-get-existing'; |
| class C extends HTMLElement {}; |
| customElements.define(name, C); |
| assert_equals(customElements.get(name), C, 'get() returns the constructor') |
| return Promise.resolve(customElements); |
| }).then(customElements => { |
| // 2. Otherwise, return undefined. |
| assert_equals(customElements.get('test-get-not-defined'), undefined, |
| 'get() returns undefined for not-defined name'); |
| }).catch(reason => { throw reason })); |
| })(); |
| </script> |
| </body> |
