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86 changes: 86 additions & 0 deletions
86
packages/happy-dom/src/custom-element/CustomElementReactionStack.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| import HTMLElement from '../nodes/html-element/HTMLElement.js'; | ||
| import BrowserWindow from '../window/BrowserWindow.js'; | ||
| import * as PropertySymbol from '../PropertySymbol.js'; | ||
| import WindowBrowserContext from '../window/WindowBrowserContext.js'; | ||
|
|
||
| /** | ||
| * Custom element reaction stack. | ||
| * | ||
| * @see https://html.spec.whatwg.org/multipage/custom-elements.html#custom-element-reactions-stack | ||
| */ | ||
| export default class CustomElementReactionStack { | ||
| private window: BrowserWindow; | ||
|
|
||
| /** | ||
| * Constructor. | ||
| * | ||
| * @param window Window. | ||
| */ | ||
| constructor(window: BrowserWindow) { | ||
| this.window = window; | ||
| } | ||
|
|
||
| /** | ||
| * Enqueues a custom element reaction. | ||
| * | ||
| * @see https://html.spec.whatwg.org/multipage/custom-elements.html#enqueue-a-custom-element-callback-reaction | ||
| * @see https://html.spec.whatwg.org/multipage/custom-elements.html#enqueue-an-element-on-the-appropriate-element-queue | ||
| * @param element Element. | ||
| * @param callbackName Callback name. | ||
| * @param [args] Arguments. | ||
| */ | ||
| public enqueueReaction(element: HTMLElement, callbackName: string, args?: any[]): void { | ||
| // If a polyfill is used, [PropertySymbol.registry] may be undefined | ||
| const definition = this.window.customElements[PropertySymbol.registry]?.get(element.localName); | ||
|
|
||
| if (!definition) { | ||
| return; | ||
| } | ||
|
|
||
| // If the element is not connected to the main document, we should not invoke the callback. | ||
| if (element[PropertySymbol.ownerDocument] !== this.window.document) { | ||
| return; | ||
| } | ||
|
|
||
| // According to the spec, we should use a queue for each element and then invoke the reactions in the order they were enqueued asynchronously. | ||
| // However, the browser seem to always invoke the reactions synchronously. | ||
| // TODO: Can we find an example where the reactions are invoked asynchronously? In that case we should use a queue for those cases. | ||
|
|
||
| switch (callbackName) { | ||
| case 'connectedCallback': | ||
| if (definition.livecycleCallbacks.connectedCallback) { | ||
| const returnValue = definition.livecycleCallbacks.connectedCallback.call(element); | ||
|
|
||
| /** | ||
| * It is common to import dependencies in the connectedCallback() method of web components. | ||
| * As Happy DOM doesn't have support for dynamic imports yet, this is a temporary solution to wait for imports in connectedCallback(). | ||
| * | ||
| * @see https://github.com/capricorn86/happy-dom/issues/1442 | ||
| */ | ||
| if (returnValue instanceof Promise) { | ||
| const asyncTaskManager = new WindowBrowserContext(this.window).getAsyncTaskManager(); | ||
| if (asyncTaskManager) { | ||
| const taskID = asyncTaskManager.startTask(); | ||
| returnValue | ||
| .then(() => asyncTaskManager.endTask(taskID)) | ||
| .catch(() => asyncTaskManager.endTask(taskID)); | ||
| } | ||
| } | ||
| } | ||
| break; | ||
| case 'disconnectedCallback': | ||
| if (definition.livecycleCallbacks.disconnectedCallback) { | ||
| definition.livecycleCallbacks.disconnectedCallback.call(element); | ||
| } | ||
| break; | ||
| case 'attributeChangedCallback': | ||
| if ( | ||
| definition.livecycleCallbacks.attributeChangedCallback && | ||
| definition.observedAttributes.has(args[0]) | ||
| ) { | ||
| definition.livecycleCallbacks.attributeChangedCallback.apply(element, args); | ||
| } | ||
| break; | ||
| } | ||
| } | ||
| } |
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