hasClass-vs-is

JavaScript performance comparison

Revision 17 of this test case created

Preparation code

<span class="class1">Element</span>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script>
Benchmark.prototype.setup = function() {
    var element = $('span'),
        vElement = element[0];
};
</script>

Preparation code output

Element

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Testing in unknown unknown
Test Ops/sec
hasClass
if( element.hasClass('class1') ) {
  console.log("match");
}
pending…
is
if( element.is('.class1') ) {
  console.log("match");
}
pending…
match
if( element.attr('class').match(/class1/) ) {
  console.log("match");
}
pending…
match on almost vanilla element
if( element[0].className.match(/class1/) ) {
  console.log("match");
}
pending…
match on vanilla element
if( vElement.className.match(/class1/) ) {
  console.log("match");
}
pending…

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