How do I add a class to a given element?

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清酒与你 2020-11-21 11:34

I have an element that already has a class:


      
      
        
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                   南笙
                                             
                
                
                (楼主)
            
              
              
                2020-11-21 12:12
              

            
            
                        
first, give the div an id. Then, call function appendClass:



    
             
                                                        
            
            
              
                
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