Run results for: Is in DOM .isConnected

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:132.0) Gecko/20100101 Firefox/132.0

Browser: Firefox 132

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

isConnected(div);

930.2M/s

isInDOM2

18.9M/s

isInDOM1

15.4M/s

View exact numbers

Test name	Executions per second
✓ isConnected(div);	930,231,872 Ops/sec
isInDOM2	18,895,038 Ops/sec
isInDOM1	15,386,036 Ops/sec

HTML Preparation code:

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

Script Preparation code:

function isInDOM1(oHTMLElement) {                                   
  if (oHTMLElement === document.body || oHTMLElement === document ) {
    return true;
  } else {
    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) {                                   
  var root = oHTMLElement.ownerDocument; 
  if (!root) { return false; }
  
  if ( oHTMLElement.ownerDocument.documentElement === document.documentElement ){ return true; }

  return false;
}

function domIsConnected(oHTMLElement) {                                   
  return oHTMLElement.isConnected; 
}
var div = document.getElementById('test-div');

Tests:

isInDOM1
isInDOM1(div);
isInDOM2
isInDOM2(div);
isConnected(div);
domIsConnected(div);

Run results for: Is in DOM .isConnected

Check if given element is in dom

isInDOM1

isInDOM2

isConnected(div);