jQuery method to add and delete specified tags

jQuery method to add and delete specified tags_jquery

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Release： 2016-05-16 15:25:27

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How jQuery adds and removes a style for a specified tag:
In the actual application of web pages, the CSS style of elements needs to be changed according to different conditions. This function can be achieved by dynamically adding and deleting a CSS class to the element. The following is an example of how to implement this function.
1. Use addClass() and removeClass() to add and remove a CSS class:
The code example is as follows:

<!DOCTYPE html>
<html> 
<head> 
<meta charset=" utf-8"> 
<meta name="author" content="http://www.softwhy.com/" /> 
<title>首页</title> 
<style type="text/css">
.mytest{
 border:1px solid green;
 width:100px;
 height:100px;
 color:red;
}
</style>
<script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script>
<script type="text/javascript">
$(document).ready(function () {
 $("#add").click(function () {
 $("div").addClass("mytest");
 });
 $("#del").click(function () {
 $("div").removeClass("mytest");
 })
})
</script>
<body>
<div>珍惜当前，因为只有当前才是实实在在的</div>
<button id="add">添加样式</button>
<button id="del">删除样式</button>
</body>
</html>

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The above code can add and delete specified styles. The above is just a demonstration and can be added or deleted according to specific needs.
2. Use toggleClass() to switch between adding and deleting style classes:
If the matching object has the specified style class, then toggleClass() can delete the specified class, if not, the specified class will be added. The code strength is as follows:

<!DOCTYPE html>
<html> 
<head> 
<meta charset=" utf-8"> 
<meta name="author" content="http://www.softwhy.com/" /> 
<title>首页</title> 
<style type="text/css">
.mytest{
 border:1px solid green;
 width:100px;
 height:100px;
 color:red;
}
</style>
<script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script>
<script type="text/javascript">
$(document).ready(function () {
 $("#switch").click(function () {
 $("div").toggleClass("mytest");
 });
})
</script>
<body>
<div class="mytest">珍惜当前，因为只有当前才是实实在在的</div>
<button id="switch">删除与添加切换</button>
</body>
</html>

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The above code can be used to switch between deleting and adding specified style classes. I hope you can do it yourself, and the harvest may be greater.