Question

Possible Duplicate:
Best way to detect that HTML5 <canvas> is not supported

Now that $.browser is being taken out of jQuery in favor of $.support, how would I detect IE8 with jQuery, or with plain javascript?

if ($.browser.msie  && parseInt($.browser.version, 10) === 8) {
  alert('IE8'); 
}

Sorry, but HTML will not work for me. So I can not do this:

<!--[if IE 8]>
<script type="text/javascript">
    ie = 8;
</script>
<![endif]-->

Specifically, I am looking to do work with the canvas tag and IE8 does not support canvas, but jQuery.support does not detect for canvas support.

Answer 1

Test for the feature instead:

var el = document.createElement('canvas');
if (el.getContext && el.getContext('2d')) {
    // canvas supported 
}

Edit:

As in the link suggested in comments by Brandon Boone, here’s a function that does it:

function isCanvasSupported(){
  var elem = document.createElement('canvas');
  return !!(elem.getContext && elem.getContext('2d'));
}