jquery is vs hasclass vs pure

JavaScript performance comparison

Revision 23 of this test case created by is Vs HasClass

Preparation code

<a class="someClass" id="someElement" href="#">link</a>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script>
  var $t = $("#someElement"), $$t = $t[0];
 
  function hasClass(el, selector) {
   var className = " " + selector + " ";
 
   if ((" " + el.className + " ").replace(/[\n\t]/g, " ").indexOf(className) > -1) {
    return true;
   }
 
   return false;
  }
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
is
$t.is("a.someClass");
pending…
hasClass
$t.hasClass("someClass");
pending…
pureJs
hasClass($$t, 'someClass');
pending…
Pure JS Ver2
$$t.classList.contains('someClass')
pending…
Pure JS Ver3
$$t.className.match(/\someClass\b/)
pending…

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Revisions

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