c# - Code to detect mobile browser support for HTML5 -

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I want code (C # / Javascript) to find out which mobile browsers HTML5 is supporting I have a code to detect HTML5 (canvas) compatibility for the browser, but this code is not working for mobile browsers 

  if (!! document.createElement ('canvas' GetContext) {This browser supports HTML5 (canvas)} and (does not support HTML5 ...)   
 
 
 You can also use famous.

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