Easyui combotree实现模糊查询

详细讲解链接：https://www.cnblogs.com/m97i/p/7884303.html
代码：
/**
 * combotree模糊查询
 */
(function(){
    //combotree可编辑，自定义模糊查询
    $.fn.combotree.defaults.editable = true;
    $.extend($.fn.combotree.defaults.keyHandler,{
        up:function(){
            console.log('up');
        },
        down:function(){
            console.log('down');
            'a'.toUpperCase()
        },
        enter:function(){
            console.log('enter');
        },
        query:function(q){
            var t = $(this).combotree('tree');
            t.tree('expandAll');
            var nodes = t.tree('getChildren');
            for(var i=0; i= 0){
                    $(node.target).show();
                } else {
                    $(node.target).hide();
                }
            }
            var opts = $(this).combotree('options');
            if (!opts.hasSetEvents){
                opts.hasSetEvents = true;
                var onShowPanel = opts.onShowPanel;
                opts.onShowPanel = function(){
                    var nodes = t.tree('getChildren');
                    for(var i=0; i