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Check CustomEvent constructor params (#2011)

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迷渡 2019-03-28 20:08:32 +08:00 committed by Ryan Dahl
parent 8ac36d8db4
commit 1fec34b463
1 changed files with 2 additions and 1 deletions
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3
js/custom_event.ts
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@ -1,7 +1,7 @@
// Copyright 2018 the Deno authors. All rights reserved. MIT license.
import * as domTypes from "./dom_types";
import * as event from "./event";
import { getPrivateValue } from "./util";
import { getPrivateValue, requiredArguments } from "./util";
// 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
@ -28,6 +28,7 @@ export class CustomEvent extends event.Event implements domTypes.CustomEvent {
type: string,
customEventInitDict: domTypes.CustomEventInit = {}
) {
requiredArguments("CustomEvent", arguments.length, 1);
super(type, customEventInitDict);
const { detail = null } = customEventInitDict;
customEventAttributes.set(this, { detail });