Javascript之this指向
变换莫测的this指向
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事件调用环境
谁触发事件,函数里面的this就指向谁1
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<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
.box{
width: 100px;
height: 100px;
background: #0A8CD2;
left: 0;
transition: 1s;
position: relative;
}
</style>
</head>
<body>
<div class="box"></div>
<script>
let box = document.querySelector('.box');
box.onclick = move;
function move(){
this.style.left = '100px';
}
console.log(this);
</script>
</body>
</html> -
全局环境
如上所示全局环境下在浏览器中的this指向window。
在Node环境中如下图所示