<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<ul>
<li>星期1</li>
<li>星期2</li>
<li>星期3</li>
<li>星期4</li>
<li>星期5</li>
</ul>
<script>
var lis = document.querySelectorAll('li');
var ul = document.querySelector('ul')
for (var i = 0; i < lis.length; i++) {
//添加自定义属性index
lis[i].index = i;
lis[i].onclick = function() {
ul.removeChild(this);
console.log(this.index);//打印当前li的index
}
}
</script>
</body>
</html>