小编Wiz*_*Kid的帖子

console.clear();

var hierarchyNode = function (parent) {
    var self = this;
    this.name = "Node Name";
    this.hasChildren = ko.observable(true);
    this.childNodes = ko.observableArray();
    this.expanded = ko.observable(false);
};

hierarchyNode.prototype = {
    name: null,
    hasChildren: null,
    childNodes: null,
    getChildNodes: function (element, event) {
        if (element.hasChildren() === true && element.childNodes().length === 0) {
            element.childNodes.push(new hierarchyNode(element));
        }

        element.expanded(!element.expanded());

    }    
};

var hierarchyVM = function () {
    var self = this;

    self.hierarchyNodes = ko.observableArray();
    self.selectItem = function () {};
};

var vm = …