How to replace class in jquery

In jquery, you can use removeClass() and addClass() to replace class; you only need to use removeClass() to delete the old class name first, and then use addClass() to add a new class name. The syntax is "$ (selector).removeClass("old class name").addClass("new class name")".

The operating environment of this tutorial: windows7 system, jquery3.6.1 version, Dell G3 computer.

jquery replaces class (class)

Implementation method:

• Use removeClass() to delete Old class

• Use addClass() to add a new class

Implementation code:

       
  
测试段落
 替换class  

Description:

• The 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.
  

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