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AJLoveChina/index.html

Last active May 28, 2019 14:32
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EventEmitter class extend demo https://jsbin.com/losabat/edit?js,output
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index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JS Bin</title>
</head>
<body>
<script src='https://cdnjs.cloudflare.com/ajax/libs/EventEmitter/5.2.6/EventEmitter.min.js'></script>
<script id="jsbin-javascript">
class Dog extends EventEmitter {
constructor() {
super()
this.barks = 0;
setInterval(() => {
this.trigger("bark", [this.barks ++]);
}, 1000)
}
}
let d = new Dog();
d.on("bark", barks => {
document.writeln(barks)
})
</script>
</body>
</html>
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