The use of jQuery Attributes (Part 2, Category)_jquery

This series of articles is divided into five articles: attributes, categories, Html code, text, and values.
This article explains: the usage of addClass(class), removeClass(class), toggleClass(class).
If you have any suggestions or comments about this series of articles, please send them to email: sjzlgt@qq.com
You can go to the jQuery official website to learn more about jQuery.
. addClass(class) Usage
Definition: Add the specified class name to each matching element.
Return value: Object
Parameters: class (String): One or more CSS class names to be added to the element, please separate multiple with spaces
Example: DIV with the ID "div_a1" Add the 'redBorder' class to all images in the middle.
Code: $("#div_a1 img").addClass("redBorder");

2. removeClass(class) usage
Definition: from all matching elements Delete all or specified classes.
Return value: Object
Parameters: class (String): (optional) One or more CSS class names to be deleted, please separate multiple with spaces
Instance: Change the ID of "div_b1" Delete the 'redBorder' class for all images in the DIV.
Code: $("#div_b1 img").removeClass("redBorder");

3. toggleClass(class) usage
Definition: If exists (does not exist) ) to delete (add) a class.
Return value: Object
Parameters: class (String): CSS class name
Instance: Switch all images in the DIV with the ID "div_c1" to the 'redBorder' class. Code: $("#div_c1 img").toggleClass("redBorder");

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<title>jQuery-Attributes-2</title> <style type="text/css"> .div { width:95%; margin-left:15px; margin-top:15px; margin-right:15px; padding-left:5px; padding-top:5px; padding-bottom:5px; background-color:#ccc; border:#999 1px solid; line-height:30px; font-size:13px; font-family:微软雅黑; } .blue{color:Blue;} .green{color:Green;} .button{border:green 1px solid;width:100px;} .xiaobiao{ font-weight:bold;} .red_test{background-color:red; color:White; width:300px; height:30px;} .li_test{border:#000 1px solid;} .redBorder{border:Red 1px solid; padding:1px;} </style> <div class="div"> <div style="width:100%; text-align:center; font-size:16px; font-weight:bold;"> </div>Usage of jQuery-Attributes ( 2. Category articles)<br> This series of articles mainly talks about how to use the attributes (Attributes) of the jQuery framework. I will explain it with examples, based on simplicity and comprehensiveness, and will not involve Very deep, my learning method: get started first, then advance! <br> This series of articles is divided into five articles: attributes, categories, Html code, text, and values. <br> This article explains: the usage of addClass(class), removeClass(class), toggleClass(class). <br> If you have any suggestions or comments about this series of articles, please send them to email: sjzlgt@qq.com <a href="http://jquery.com/" target="_blank"> You can go to </a>jQuery official website<br> to learn more about jQuery. <span style="color:Red;"> <strong><a href="http://www.cnblogs.com/bynet/" target="_blank">Copyright: code-cat Blog:</a>http://www.cnblogs.com/bynet</strong> Please retain the original author, source and copyright information when reprinting! </span> </div> <div class="div"> <span class="xiaobiao"> </span>1. addClass(class) usage<br><br> Definition: Adds the specified class name to each matching element. <br> Return value: Object<br> Parameters: class (String): One or more CSS class names to be added to the element, please separate multiple with spaces <br> Example: Add the 'redBorder' class to all pictures in the DIV with the ID "div_a1". <span style="border:blue 1px solid;"> <span style="color:green;">Code: $("#div_a1 img").addClass("redBorder");</span> //Click the button to see the effect</span><div id="div_a1" style="border:red 1px solid; padding-bottom:5px; padding-left:5px; width:98%;"> <br> DIV ID="div_a1"<img id="img_1" name="img_bky" src="http://www.cnblogs.com/images/logo_small.gif" style="max-width:90%" style="max-width:90%" alt="The use of jQuery Attributes (Part 2, Category)_jquery" border="0"> <img id="img_2" name="img_yh" src="http://news.cnblogs.com/images/logo/yahoo.gif" style="max-width:90%" style="max-width:90%" alt="The use of jQuery Attributes (Part 2, Category)_jquery" border="0"> <br> <input type="button" id="btn_1" value="按钮一" class="button"> <br> </div> </div> <script src="http://img.jb51.net/jslib/jquery/jquery-1.3.2.min.js" type="text/javascript"></script> <script type="text/javascript"> $("#btn_1").click(function(){ $("#div_a1 img").addClass("redBorder"); }); </script> <div class="div"> <span class="xiaobiao">2. removeClass(class)用法</span><br> 定义：从所有匹配的元素中删除全部或者指定的类。<br> 返回值：Object<br> 参数：class (String) : (可选) 一个或多个要删除的CSS类名，多个请用空格分开<br> 实例：将ID为"div_b1"的DIV中第所有图片删除 'redBorder' 类 。<br> <span style="border:blue 1px solid;">代码： $("#div_b1 img").removeClass("redBorder");<span style="color:green;"> //点击按钮二看效果</span></span> <div id="div_b1" style="border:red 1px solid; padding-bottom:5px; padding-left:5px; width:98%;"> DIV ID="div_b1"<br> <img id="img1" class="redBorder" name="img_bky" src="http://www.cnblogs.com/images/logo_small.gif" style="max-width:90%" style="max-width:90%" alt="The use of jQuery Attributes (Part 2, Category)_jquery" border="0"> <img id="img2" class="redBorder" name="img_yh" src="http://news.cnblogs.com/images/logo/yahoo.gif" style="max-width:90%" style="max-width:90%" alt="The use of jQuery Attributes (Part 2, Category)_jquery" border="0"> <br> <input type="button" id="btn_2" value="按钮二" class="button"><br> <script type="text/javascript"> $("#btn_2").click(function(){ $("#div_b1 img").removeClass("redBorder"); }); </script> </div> </div> <div class="div"> <span class="xiaobiao">3. toggleClass(class)用法</span><br> 定义：如果存在（不存在）就删除（添加）一个类。<br> 返回值：Object<br> 参数：class (String) :CSS类名<br> 实例：将ID为"div_c1"的DIV中第所有图片切换 'redBorder' 类 。<br> <span style="border:blue 1px solid;">代码： $("#div_c1 img").toggleClass("redBorder");<span style="color:green;"> //点击按钮三看效果</span></span> <div id="div_c1" style="border:red 1px solid; padding-bottom:5px; padding-left:5px; width:98%;"> DIV ID="div_c1"<br> <img id="img3" class="redBorder" name="img_bky" src="http://www.cnblogs.com/images/logo_small.gif" style="max-width:90%" style="max-width:90%" alt="The use of jQuery Attributes (Part 2, Category)_jquery" border="0"> <img id="img4" name="img_yh" src="http://news.cnblogs.com/images/logo/yahoo.gif" style="max-width:90%" style="max-width:90%" alt="The use of jQuery Attributes (Part 2, Category)_jquery" border="0"> <br> <input type="button" id="btn_3" value="按钮三" class="button"><br> <script type="text/javascript"> $("#btn_3").click(function(){ $("#div_c1 img").toggleClass("redBorder"); }); </script> </div> </div>
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