# Yahoo! UI Library

### TreeView Widget 2.8.2r1

Yahoo! UI Library > treeview > MenuNode.js (source view)
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    /**
     * A menu-specific implementation that differs from TextNode in that only
     * one sibling can be expanded at a time.
     * @namespace YAHOO.widget
     * @class MenuNode
     * @extends YAHOO.widget.TextNode
     * @param oData {object} a string or object containing the data that will
     * be used to render this node.
     * Providing a string is the same as providing an object with a single property named label.
     * All values in the oData will be used to set equally named properties in the node
     * as long as the node does have such properties, they are not undefined, private or functions.
     * All attributes are made available in noderef.data, which
     * can be used to store custom attributes.  TreeView.getNode(s)ByProperty
     * can be used to retrieve a node by one of the attributes.
     * @param oParent {YAHOO.widget.Node} this node's parent node
     * @param expanded {boolean} the initial expanded/collapsed state (deprecated; use oData.expanded)
     * @constructor
     */
    YAHOO.widget.MenuNode = function(oData, oParent, expanded) {
        YAHOO.widget.MenuNode.superclass.constructor.call(this,oData,oParent,expanded);

       /*
         * Menus usually allow only one branch to be open at a time.
         */
        this.multiExpand = false;

    };

    YAHOO.extend(YAHOO.widget.MenuNode, YAHOO.widget.TextNode, {

        /**
         * The node type
         * @property _type
         * @private
        * @default "MenuNode"
         */
        _type: "MenuNode"

    });

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