Preparation code

<section>
<div><div><div><div><div id="end" class="end"><div><div><div><div><div><div><div><div>
<article>
<p>
<span id="start" class="start"></span>
</p>
</article>
</div></div></div></div></div></div></div></div></div></div></div></div></div>
</section>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
 
<script>
  Benchmark.prototype.setup = function() {
    var startJQ = $( '#start' ),
        startDOM = $( '#start' )[0];
    
    Element.prototype.closestByClassName = function ( className ) {
    
        return this.className && this.className.split( ' ' ).indexOf( className ) > -1
            ? this
            : ( this.parentNode.closestByClassName && this.parentNode.closestByClassName( className ) );
    
    };
    
    
  };
</script>

Preparation code output

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var element = startJQ.closest( '.start' ),
    element = startJQ.closest( '.end' ),
    element = startJQ.closest( '.not-found' );
 

var element = startDOM.closestByClassName( 'start' ),
    element = startDOM.closestByClassName( 'end' ),
    element = startDOM.closestByClassName( 'not-found' );

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Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 1: published by ThinkingStiff on 24th November 2011
• Revision 2: published by eternal on 28th November 2011

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