Pure js hasClass vs jQuery hasclass

JavaScript performance comparison

Revision 9 of this test case created

Info

Additional comparison of className and getAttribute("class")

Preparation code

<div class=" this is just a test case mother someClass " id="someElement"></div>
<script>
  var el = document.getElementById('someElement');
 
  function hasClass(el, selector){if((el.className).indexOf(" "+selector)>-1) {
    return true;
   }
   return false;
  }
 


  function hasClass2(el, selector) {
 
   if ((" " + el.className).replace(/[\n\t]/g, " ").indexOf(" " + selector ) > -1) {
    return true;
   }
   return false;
  }

function hasClass3(el, selector) {
   if (el.className.match("\b"+selector)){return false;}return true;}
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
hasClass3
hasClass3(el, 'someClass'); 
pending…
Pure JS (className)
hasClass(el, 'someClass');
pending…
Pure JS (getAttribute)
hasClass2(el, 'someClass');
pending…

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