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Method to delete subset class: 1. Use find() to get all subset elements under the specified element, the syntax is "specified element object.find("*")"; 2. Use removeAttr() to get all subset elements from To remove class from the obtained subset elements, the syntax is "subset element..removeAttr("class")".
The operating environment of this tutorial: windows7 system, jquery1.10.2 version, Dell G3 computer.
jquery deletes a subset of classes
Implementation method:
Use find() method Get all subset elements (including subsets of subsets) under the specified element
Use the removeAttr() method to remove the specified attribute from the selected element.
When the parameter of the removeAttr() method is specified as "class", the class can be deleted.
Example:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="js/jquery-1.10.2.min.js"></script>
<style>
.div,
div * {
display: block;
border: 2px solid lightgrey;
color: lightgrey;
padding: 5px;
margin: 15px;
}
.a{
color: red;
border: 2px solid red;
}
.b{
color: bisque;
border: 2px solid bisque;
}
</style>
<script>
$(document).ready(function() {
$("button").on("click", function() {
$("ul").find("*").removeAttr("class");
});
});
</script>
</head>
<body class="ancestors">
<div style="width:500px;">div (父节点)
<ul>ul (指定元素)
<li class="a">li (子节点1)
<span class="b">span (孙节点1)</span>
</li>
<li class="a">li (子节点2)
<span class="b">span (孙节点2)</span>
</li>
<li class="a">li (子节点3)
<span class="b">span (孙节点3)</span>
</li>
</ul>
</div>
<button>删除子集class</button>
</body>
</html>
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