Js interprets whether the browser supports html5 canvas code

 
<canvas id="myCanvas" width= " 300 "  height= " 200 "  style="border:1px solid #c3c3c3;"> 
Your browser does not support the canvas element. 
</canvas> 
<script type="text/javascript"> 
var myCanvas = document.getElementById("myCanvas"); 
if (!myCanvas.getContext) 
{ 
alert(" Your browser does not support it Canvas."); 
} 
else 
{ 
alert(" Your browser supports Canvas."); 
} 
</script>