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    Node.previousSibling

    The Node.previousSibling read-only property returns the node immediately preceding the specified one in its parent's childNodes list, or null if the specified node is the first in that list.

    Syntax

    previousNode = node.previousSibling;
    

    Example

    // <a><b1 id="b1"/><b2 id="b2"/></a>
    
    alert(document.getElementById("b1").previousSibling); // null
    alert(document.getElementById("b2").previousSibling.id); // "b1"
    

    Notes

    Gecko-based browsers insert text nodes into a document to represent whitespace in the source markup. Therefore a node obtained, for example, using Node.firstChild or Node.previousSibling may refer to a whitespace text node rather than the actual element the author intended to get.

    See Whitespace in the DOM and W3C DOM 3 FAQ: Why are some Text nodes empty? for more information.

    To navigate the opposite way through the child nodes list use Node.nextSibling.

    Specification

    Document Tags and Contributors

    Last updated by: fscholz,