jquery is vs hasclass vs pure

JavaScript performance comparison

Revision 6 of this test case created by Jeremy A. Prescott

Preparation code

<a class="someClass" id="someElement" href="#">link</a>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script>
  var $t = $("#someElement");
  var target = $t.get(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

<a class="someClass" id="someElement" href="#">link</a>

Test runner

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
is
$t.is(".someClass");
pending…
hasClass
$t.hasClass("someClass");
pending…
pureJs
hasClass(target, 'someClass');
pending…
is non existing
$t.is(".otherClass");
pending…
hasClass non existing
$t.hasClass("otherClass");
pending…
pureJs non existing
hasClass(target, 'otherClass');
pending…

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Revisions

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