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


    node.contains( otherNode ) 


    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) ? ? ?


    See also

    Document Tags and Contributors

    Last updated by: fscholz,