jQuery CSS 类

With jQuery, CSS elements can be easily manipulated. Switch CSS classes

jQuery operations CSS

jQuery has several methods for performing CSS operations. We will learn the following:

addClass() - Adds one or more classes to the selected element
removeClass() - Removes the class from the selected element Select an element to delete one or more classes
toggleClass() - Perform a switching operation of adding/deleting classes to the selected element
css( ) - Set or return style properties

jQuery addClass() method

The following example shows how Add class attributes to different elements. Of course, when adding a class, you can also select multiple elements:

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
    </script>
    <script>
        $(document).ready(function(){
            $("button").click(function(){
                $("h1,p").addClass("blue");
                $("div").addClass("important");
            });
        });
    </script>
    <style type="text/css">
        .important
        {
            font-weight:bold;
            font-size:xx-large;
        }
        .blue
        {
            color:blue;
        }
    </style>
</head>
<body>
<h1>标题 1</h1>
<h2>标题 2</h2>
<p>这是一个段落。</p>
<p>这是另外一个段落。</p>
<div>这是一些重要的文本!</div>
<br>
<button>为元素添加 class</button>
</body>
</html>

Run the program to try it

You can also specify multiple classes in the addClass() method:

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
    </script>
    <script>
        $(document).ready(function(){
            $("button").click(function(){
                $("#div1").addClass("important blue");
            });
        });
    </script>
    <style type="text/css">
        .important
        {
            font-weight:bold;
            font-size:xx-large;
        }
        .blue
        {
            color:blue;
        }
    </style>
</head>
<body>
<div id="div1">这是一些文本。</div>
<div id="div2">这是一些文本。</div>
<br>
<button>为第一个 div 元素添加类</button>
</body>
</html>

Run the program to try it

jQuery removeClass() method

The following example demonstrates how Delete the specified class attribute in different elements:

Example

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
    </script>
    <script>
        $(document).ready(function(){
            $("button").click(function(){
                $("h1,h2,p").removeClass("blue");
            });
        });
    </script>
    <style type="text/css">
        .important
        {
            font-weight:bold;
            font-size:xx-large;
        }
        .blue
        {
            color:blue;
        }
    </style>
</head>
<body>
<h1 class="blue">标题 1</h1>
<h2 class="blue">标题 2</h2>
<p class="blue">这是一个段落。</p>
<p>这是另外一个段落。</p>
<br>
<button>从元素中移除 class</button>
</body>
</html>

Run the program to try it

jQuery toggleClass() method

The following example will show how to use the jQuery toggleClass() method. This method performs the switching operation of adding/deleting classes to the selected elements:

Example

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
    </script>
    <script>
        $(document).ready(function(){
            $("button").click(function(){
                $("h1,h2,p").toggleClass("blue");
            });
        });
    </script>
    <style type="text/css">
        .blue
        {
            color:blue;
        }
    </style>
</head>
<body>
<h1 class="blue">标题 1</h1>
<h2 >标题 2</h2>
<p class="blue">这是一个段落。</p>
<p>这是另外一个段落。</p>
<br>
<button>切换 class</button>
</body>
</html>

Run the program and try it

Continuing Learning

new file

<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"> </script> <script> $(document).ready(function(){ $("button").click(function(){ $("h1,h2,p").toggleClass("blue"); }); }); </script> <style type="text/css"> .blue { color:blue; } </style> </head> <body> <h1 class="blue">标题 1</h1> <h2 >标题 2</h2> <p class="blue">这是一个段落。</p> <p>这是另外一个段落。</p> <br> <button>切换 class</button> </body> </html>

submit Reset Code

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