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jquery怎么删除子元素并保留第一个

WBOY

WBOY

发布时间:2022-05-18 16:18:17

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来源于php中文网

原创

方法:1、利用“$(元素).children()”获取元素的子元素对象;2、利用“子元素对象.not(":first")”获取除第一个子元素外的子元素对象;3、用“除第一个子元素外的子元素对象.remove()”删除子元素并保留第一个即可。

jquery怎么删除子元素并保留第一个

本教程操作环境:windows10系统、jquery3.2.1版本、Dell G3电脑。

jquery怎么删除子元素并保留第一个

1、利用children获取子元素

children() 方法返回被选元素的所有直接子元素。

DOM 树:该方法只沿着 DOM 树向下遍历单一层级。如需向下遍历多个层级(返回子孙节点或其他后代),请使用 find() 方法。

提示:如需沿着 DOM 树向上遍历单一层级,或向上遍历直至文档根元素的所有路径(返回父节点或其他祖先),请使用 parent() 或 parents() 方法。

语法为:

$(selector).children(filter)

2、利用not配合:first排除第一个子元素

not() 方法返回不符合一定条件的元素。

该方法让您规定一个条件。不符合条件的元素将从选择中返回,符合条件的元素将被移除。

该方法通常用于从被选元素组合中移除一个或多个元素。

:first 选择器选取第一个元素。

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语法为

$(":first")

3、利用remove删除元素

remove() 方法移除被选元素,包括所有的文本和子节点。

该方法也会移除被选元素的数据和事件。

语法为:

$(selector).remove()

示例如下:





123/title>
<style>
.descendants *{ 
display: block;
border: 2px solid lightgrey;
color: lightgrey;
padding: 5px;
margin: 15px;
}
</style>
<script src="js/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("ul").children().not(":first").remove();
});
</script>
</head>
<body class="descendants">body (曾祖先节点)
<div style="width:500px;">div (祖先节点)
<ul>ul (直接父节点)  
<li>li (第一个子节点)
<span>span (孙节点)</span>
</li>
<li>li (第二个子节点)
<span>span (孙节点)</span>
</li>
<li>li (第三个子节点)
<span>span (孙节点)</span>
</li>
<li>li (第四个子节点)
<span>span (孙节点)</span>
</li>
</ul>   
</div>
</body>
</html></pre><p>输出结果:</p>
<p><img src="https://img.php.cn/upload/image/529/151/815/1652861347281002.png" title="1652861347281002.png" alt="06.png"></p>
<p>相关视频教程推荐:<a href="https://www.php.cn/course/list/19.html" target="_blank" textvalue="jQuery教程">jQuery视频教程</a></p>					</div>
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