lovecoding
/
W260426


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <ul>
        <li>1</li>
        <li>2</li>
        <li>3</li>
        <li>4</li>
        <li>5</li>
    </ul>
    <script>
        // 获取元素
        var lis = document.querySelectorAll("li");
        // 遍历lis数组
        for(var i =0 ;i<lis.length;i++){
            // 给每个li添加一个序号属性
            lis[i].index = i;
            lis[i].onclick = function(){
                console.log(this.index);
            }
        }
    </script>
</body>
</html>