Pure js hasClass vs jQuery hasclass

JavaScript performance comparison

Revision 7 of this test case created

Info

Additional comparison of className and getAttribute("class")

Preparation code

<div class="someClass" id="someElement"></div><script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script>
  var el = document.getElementById('someElement');
 
  function hasClass(el, selector) {
   
 
   if ((" " + el.className + " ").replace(/[\n\t]/g, " ").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;
  }
</script>

Preparation code output

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

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