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IE9 bug with optional

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滥情空心 2021-01-23 01:13

I tried this code in IE9, unexpectedly it got screwed because of a missing

after heading.

live demo

                  
        
        

          

            
            

              
              

            
    


                                 
              

            

                          
    

        
         

                
                

                  
                

                

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