450 for of 循环 

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>06_for_of循环</title>
</head>

<body>

    <!--
        for(let value of target){}循环遍历
        1. 遍历数组
        2. 遍历Set
        3. 遍历Map
        4. 遍历字符串
        5. 遍历伪数组
    -->

    <button>按钮1</button>
    <button>按钮2</button>
    <button>按钮3</button>

    <script type="text/javascript">

        let arr = [1, 2, 3, 4, 5];
        for (let num of arr) {
            console.log(num);
        }

        let set = new Set([1, 2, 3, 4, 5]);
        for (let num of set) {
            console.log(num);
        }

        let str = 'abcdefg';
        for (let num of str) {
            console.log(num);
        }

        let btns = document.getElementsByTagName('button');
        for (let btn of btns) {
            console.log(btn.innerHTML); // 按钮1 按钮2 按钮3
        }

    </script>
</body>

</html>

posted on 2020-04-15 09:09  冲啊！  阅读(103)  评论(0)  编辑  收藏  举报

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