The ProgressEvent.lengthComputable read-only property is a Boolean flag indicating if the resource concerned by the ProgressEvent has a length that can be calculated. If not, the ProgressEvent.total property has no significant value.
Syntax
flag = ProgressEvent.lengthComputable
Specifications
Browser compatibility
 
  
   | Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari | 
  
   | Basic support | No support | (Yes) | 3.5 (1.9.1) | No support | No support | No support | 
 
 
 
  
   | Feature | Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | 
  
   | Basic support | No support | (Yes) | 1.0 (1.9.1) | No support | No support | No support | 
 
 
See also
              
                
                
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