JavaScript console.log causes error: “Synchronous XMLHttpRequest on the main thread is deprecated…”

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爱一瞬间的悲伤 2020-11-22 09:26

I have been adding logs to the console to check the status of different variables without using the Firefox debugger.

However, in many places in which I add a


      
      
        
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                   野趣味
                                             
                
                
                (楼主)
            
              
              
                2020-11-22 09:49
              

            
            
                        
In my case this was caused by the flexie script which was part of the "CDNJS Selections" app offered by Cloudflare.

According to Cloudflare "This app is being deprecated in March 2015". I turned it off and the message disappeared instantly.

You can access the apps by visiting https://www.cloudflare.com/a/cloudflare-apps/yourdomain.com

NB: this is a copy of my answer on this thread Synchronous XMLHttpRequest warning and 

                                 
              
            
                          
    

        
         
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