docs: function keydown(opts, optIdx, e) {
            var isStop = false;
            if (!opts.enterableKeyCodes) {} else if (e.which && opts.enterableKeyCodes[e.which]) {} else if (!e.metaKey && !e.ctrlKey && !e.shiftKey) {
              //console.log(e.which, opts.enterableKeyCodes);
              isStop = true;
            }
            if (isStop) ax5.util.stopEvent(e);
          }