JS练习_点击一次设置，再次点击取消设置


源码：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>DOM通过class属性设置样式</title>
    <style>
        .active{
            background-color: red;
        }
    </style>
</head>
<body>
<h1>Hello World</h1>
<h1>Hello World</h1>
<h1>Hello World</h1>
<h1>Hello World</h1>
<h1>Hello World</h1>

<script>
    let h1List = document.querySelectorAll("h1");
    for(let i in h1List){
        h1List[i].onclick = function (){
            if (this.className === "active"){
                this.className = ""
            }else {
                this.className = "active"
            }
        }
    }
</script>
</body>
</html>
posted @ 2021-09-20 16:22  博客zhu虎康  阅读(349)  评论(0)  编辑  收藏  举报