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denoland-deno/js/custom_event.ts
Ryan Dahl d43b43ca78
Refactor snapshot build (#2825)
Instead of using core/snapshot_creator.rs, instead two crates are
introduced which allow building the snapshot during build.rs.

Rollup is removed and replaced with our own bundler. This removes
the Node build dependency. Modules in //js now use Deno-style imports
with file extensions, rather than Node style extensionless imports.

This improves incremental build time when changes are made to //js files
by about 40 seconds.
2019-09-02 17:07:11 -04:00

64 lines
1.9 KiB
TypeScript

// Copyright 2018 the Deno authors. All rights reserved. MIT license.
import * as domTypes from "./dom_types.ts";
import * as event from "./event.ts";
import { getPrivateValue, requiredArguments } from "./util.ts";
// WeakMaps are recommended for private attributes (see MDN link below)
// https://developer.mozilla.org/en-US/docs/Archive/Add-ons/Add-on_SDK/Guides/Contributor_s_Guide/Private_Properties#Using_WeakMaps
export const customEventAttributes = new WeakMap();
export class CustomEventInit extends event.EventInit
implements domTypes.CustomEventInit {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
detail: any;
constructor({
bubbles = false,
cancelable = false,
composed = false,
detail = null
}: domTypes.CustomEventInit) {
super({ bubbles, cancelable, composed });
this.detail = detail;
}
}
export class CustomEvent extends event.Event implements domTypes.CustomEvent {
constructor(
type: string,
customEventInitDict: domTypes.CustomEventInit = {}
) {
requiredArguments("CustomEvent", arguments.length, 1);
super(type, customEventInitDict);
const { detail = null } = customEventInitDict;
customEventAttributes.set(this, { detail });
}
// eslint-disable-next-line @typescript-eslint/no-explicit-any
get detail(): any {
return getPrivateValue(this, customEventAttributes, "detail");
}
initCustomEvent(
type: string,
bubbles?: boolean,
cancelable?: boolean,
// eslint-disable-next-line @typescript-eslint/no-explicit-any
detail?: any
): void {
if (this.dispatched) {
return;
}
customEventAttributes.set(this, { detail });
}
get [Symbol.toStringTag](): string {
return "CustomEvent";
}
}
/** Built-in objects providing `get` methods for our
* interceptable JavaScript operations.
*/
Reflect.defineProperty(CustomEvent.prototype, "detail", { enumerable: true });