Modification method: 1. Use attr() to set the class attribute value, modify the css class name, the syntax is "element object.attr("class","new class")"; 2. Remove the old class and To add a new css class, the syntax is "element object.removeClass("old class name").addClass("new class name")".

The operating environment of this tutorial: windows7 system, jquery1.10.2 version, Dell G3 computer.

jquery method to modify css class

Method 1: Use attr() to set the class attribute value and modify the css class name

       
  
这是一个大标题
 
这是一个段落
 修改css类  

Method 2: Use removeClass() to remove the old class and addClass() to add the new css class

• removeClass() method removes one or more classes from the selected element.

• addClass() method adds one or more classes to the selected element. This method does not remove existing class attributes, it only adds one or more class attributes.

       
  
这是一个大标题
 
这是一个段落
 修改css类  

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