Node.contains()

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

SyntaxEdit

node.contains( otherNode ) 

ExampleEdit

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);
}

SpecificationsEdit

Browser compatibilityEdit

[1] Internet Explorer only supports contains() for elements.

[2] Safari 2.x implemented contains() incorrectly.

See alsoEdit

• Node.compareDocumentPosition
• Node.hasChildNodes