easyui下拉框过滤优化

$.fn.combobox.defaults.inputEvents.blur = function(e){
        var target = e.data.target;
        var opts = $(target).combobox(‘options‘);
        if (opts.reversed || opts.limitToList){
            if (opts.blurTimer){
                clearTimeout(opts.blurTimer);
            }
            opts.blurTimer = setTimeout(function(){
                var existing = $(target).parent().length;
                if (existing){
                    if (opts.reversed){
                        $(target).combobox(‘setValues‘, $(target).combobox(‘getValues‘));
                    } else if (opts.limitToList){
                        doEnter(target);
                    }
                    opts.blurTimer = null;
                }
            },50);
        }
    /* 过滤没有匹配项时，重置为初始状态 */
    var datas = $(target).combobox(‘getData‘);
    if (datas) {
      var has = false;
      datas.map(function(data){
        var text = data[opts.textField].trim(),
            val = data[opts.valueField],
            ctxt = $(target).combobox(‘getText‘).trim(),
            cVal = $(target).combobox(‘getValue‘);
        if(text == ctxt && val == cVal) has = true;
      });
      if(!has) $(target).combobox(‘reset‘);
    }
}