Run results for: jQuery by id vs Document.getElementById

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36

Browser: Chrome 63

Operating system: Mac OS X 10.12.6

Device Platform: Other

Date tested: 2025 years ago

HTML Preparation code:

<script type="text/javascript" src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.1.0.min.js"></script>
<div id="testElement"></div>

Script Preparation code:

function W() {
  this.a = document.getElementById('testElement'); 
}
W.prototype.getNode = function() {
  return this.a; 
}
var p = new W();

Tests:

jQuery
console.log('jQuery', !!$("#testElement").length);
getElementById
console.log('getElementById', !!document.getElementById('testElement'));
Contains
console.log('Contains:',document.contains(p.getNode()))