happy-dom
Version:
Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. It includes many web standards from WHATWG DOM and HTML.
114 lines • 5.29 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
var ar = [];
for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
return ar;
};
return ownKeys(o);
};
return function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
__setModuleDefault(result, mod);
return result;
};
})();
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const PropertySymbol = __importStar(require("../PropertySymbol.cjs"));
const WindowBrowserContext_js_1 = __importDefault(require("../window/WindowBrowserContext.cjs"));
/**
* Custom element reaction stack.
*
* @see https://html.spec.whatwg.org/multipage/custom-elements.html#custom-element-reactions-stack
*/
class CustomElementReactionStack {
window;
/**
* Constructor.
*
* @param window Window.
*/
constructor(window) {
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.
*/
enqueueReaction(element, callbackName, args) {
// 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_js_1.default(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;
}
}
}
exports.default = CustomElementReactionStack;
//# sourceMappingURL=CustomElementReactionStack.cjs.map