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petamoriken/MyEventTarget.js

Last active March 7, 2020 13:59
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EventTarget constructor が使えないときに無理矢理 EventTarget クラスを作るコード。
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MyEventTarget.js
class MyEventTarget extends DocumentFragment {
constructor() {
super();
Object.setPrototypeOf(this, EventTarget.prototype);
}
static [Symbol.hasInstance](instance) {
return instance instanceof EventTarget;
}
}
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petamoriken commented Mar 7, 2020 •
edited
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Feature Detection 付きの新しい方。
https://gist.github.com/petamoriken/d3745051d6f7684af58985d18efa2786

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