Pure js hasClass vs jQuery hasclass

JavaScript performance comparison

Revision 19 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(ele, cls) {
return ele.className.match(new RegExp('(\\s|^)'+cls+'(\\s|$)'));
   }
 
 
   return false;
  }
 
  function hasClass2(el, selector) {
   var className = " " + selector + " ";
   var elemClassName = el.getAttribute("class");
   if ((" " + elemClassName + " ").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
jQuery
$(el).hasClass('someClass');
pending…
Pure JS (className)
hasClass(el, 'someClass');
pending…
Pure JS (getAttribute)
hasClass2(el, 'someClass');
pending…

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