Run results for: Is in DOM Take 2

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:64.0) Gecko/20100101 Firefox/64.0

Browser: Firefox 64

Operating system: Windows 7

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
isInDOM1	613615.4 Ops/sec
isInDOM2	1347651.0 Ops/sec

HTML Preparation code:

<div id="test-div"></div>

Script Preparation code:

function isInDOM1(oHTMLElement) {                                   
  if (oHTMLElement === document.body || oHTMLElement === document ) { return true; } 
  
  try {
    return document.body.contains(oHTMLElement);
  } catch(ex) {
    // Sometimes in Firefox element is anonymous div around input.
    // Throws error "TypeError: Argument 1 of Node.contains does not implement interface Node"
    // See https://bugzilla.mozilla.org/show_bug.cgi?id=208427
    return false;
  }
}

function isInDOM2(oHTMLElement) {               
  if (!oHTMLElement.ownerDocument) { return false; }
  
  if ( oHTMLElement.ownerDocument.documentElement === document.documentElement ){ return true; }

  return false;
}

var div = document.getElementById('test-div');

Tests:

isInDOM1
isInDOM1(div);
isInDOM2
isInDOM2(div);

Run results for: Is in DOM Take 2

Check if given element is in dom

isInDOM1

isInDOM2