浅情孤唐

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遍历DOM树，获取子节点

获取子节点的方法有：

 方法  说明
 children()  选取子节点，可以带过滤参数。但只能选择子节点，不能选择孙子节点。
 find()  选取子节点，可以带过滤参数。可以选择子节点及孙子节点。

children()示例：

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<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>子节点</title>
        <script src="https://ajax.aspnetcdn.com/ajax/jquery/jquery-3.3.1.min.js"></script>
        <style>
            .box{
                border: 1px solid blueviolet;
                padding: 1px;
                margin-bottom: 12px;
            }
        </style>
    </head>
    <body>
        <div>
            <ul id="ul">
                <li id="a">油条</li>
                <li id="b">包子</li>
                <li id="c">米饺</li>
                <li id="d"><a>鱼粉</a></li>
            </ul>
        </div>
        <script>
            $('div').children("*").attr("class", "box");
        </script>
    </body>
</html>

find()示例：

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<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>子节点</title>
        <script src="https://ajax.aspnetcdn.com/ajax/jquery/jquery-3.3.1.min.js"></script>
        <style>
            .box{
                border: 1px solid blueviolet;
                padding: 1px;
                margin-bottom: 12px;
            }
        </style>
    </head>
    <body>
        <div>
            <ul id="ul">
                <li id="a">油条</li>
                <li id="b">包子</li>
                <li id="c">米饺</li>
                <li id="d"><a>鱼粉</a></li>
            </ul>
        </div>
        <script>
            $('div').find("ul").attr("class", "box");
        </script>
    </body>
</html>

posted on 2018-06-04 09:48  浅情孤唐  阅读(1009)  评论(0)    收藏  举报