Add event listeners to a nodelist

JavaScript performance comparison

Revision 169 of this test case created by Dan Haggard

Preparation code

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js">
</script>
<div>
  <ul>
    <li>
      <a href="#" name="name" class="classname">item 1</a>
    </li>
    <li>
      <a href="#" name="name" class="classname">item 2</a>
    </li>
    <li>
      <a href="#" name="name" class="classname">item 3</a>
    </li>
    <li>
      <a href="#" name="name" class="classname">item 4</a>
    </li>
    <li>
      <a href="#" name="name" class="classname">item 5</a>
    </li>
    <li>
      <a href="#" name="name" class="classname">item 6</a>
    </li>
    <li>
      <a href="#" name="name" class="classname">item 7</a>
    </li>
    <li>
      <a href="#" name="name" class="classname">item 8</a>
    </li>
    <li>
      <a href="#" name="name" class="classname">item 9</a>
    </li>
    <li>
      <a href="#" name="name" class="classname">item 10</a>
    </li>
  </ul>
</div>
<script>
  var nodes;
</script>
      
<script>
Benchmark.prototype.setup = function() {
  function clickHandler(e) {}

};
</script>

Preparation code output

<div> <ul> <li> <a href="#" name="name" class="classname">item 1</a> </li> <li> <a href="#" name="name" class="classname">item 2</a> </li> <li> <a href="#" name="name" class="classname">item 3</a> </li> <li> <a href="#" name="name" class="classname">item 4</a> </li> <li> <a href="#" name="name" class="classname">item 5</a> </li> <li> <a href="#" name="name" class="classname">item 6</a> </li> <li> <a href="#" name="name" class="classname">item 7</a> </li> <li> <a href="#" name="name" class="classname">item 8</a> </li> <li> <a href="#" name="name" class="classname">item 9</a> </li> <li> <a href="#" name="name" class="classname">item 10</a> </li> </ul> </div>

Test runner

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Java applet disabled.

Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Explicit loop style using getElementsByClassName
function addEventListenerList(list, event, fn) {
    for (var i = 0, len = list.length; i < len; i++) {
        list[i].addEventListener(event, fn, false);
    }
}

var nodeList = document.getElementsByClassName('classname');
addEventListenerList(nodeList, 'click', clickHandler); 
pending…
Implicit loop using getElementsByClassName
var nodeList = document.getElementsByClassName('classname');

[].forEach.call(nodeList ,function(e){e.addEventListener('click', clickHandler, false)});
pending…
The jQuery way
$('.classname').on('click', clickHandler);
pending…

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Revisions

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