The Node.contains() method returns a Boolean value indicating whether a node is a descendant of a given node or not.

Syntax

node.contains( otherNode ) 

Example

This function checks to see if an element is in the page's body. As contains is inclusive and determining if the body contains itself isn't the intention of isInPage this case explicitly returns false.

function isInPage(node) {
  return (node === document.body) ? false : document.body.contains(node);
}

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) 9.0 (9.0) 5.0 (only for Elements) (Yes) 3.0 [1][2]
Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? 9.0 (9.0) ? ? ?

Specification

See also

Document Tags and Contributors

Tags: 
Last updated by: gluecksmelodie,