The usage of the hasClass() method in jquery is: [$().hasClass("class name")]. The hasClass method is generally used to determine whether the element contains the specified class name. If it does, it returns true, if it does not, it returns false.
The operating environment of this tutorial: Windows 10 system, jquery version 1.12.4. This method is suitable for all brands of computers.
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Class name filtering refers to filtering based on the class of the element. In jQuery, we can use the hasClass() method to implement class name filtering.
Syntax:
$().hasClass("类名")hasClass() method is generally used to determine whether the element contains the specified class name: if it does, it returns true; if it does not, it returns false.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
<script src="js/jquery-1.12.4.min.js"></script>
<script>
$(function () {
$("li").each(function(){
var bool = $(this).hasClass("select");
if(bool){
$(this).css("color", "red");
}
})
})
</script>
</head>
<body>
<ul>
<li>HTML</li>
<li>CSS</li>
<li>JavaScript</li>
<li class="select">jQuery</li>
<li>Vue.js</li>
</ul>
</body>
</html>Effect:
$(this).hasClass("select") is used to determine whether the current li element contains the class name "select". Everyone should note here that the hasClass() method is generally used to implement judgment operations.
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