Keyboard keys A and D not responding to code...I did click on Game Canvas as suggested

[Marcecor]

Hi Everyone,
The following code is not working
// Initialize the keyboard input listening
cc.systemEvent.on(cc.SystemEvent.EventType.KEY_DOWN, this.onKeyDown, this); ..
when I run it on Simulator I get an error on that ...

---

Simulator: E/jswrapper (268): ERROR: Uncaught TypeError: Cannot read property 'a' of undefined, location: assets/scripts/Player.js:0:0
Simulator: jsb: ERROR: File ..\manual\jsb_cocos2dx_manual.cpp: Line: 653, Function: invokeJSKeyboardCallback
Simulator: invokeJSKeyboardCallback call function failed!

---

I have no clue on how to fix this ...any advice will be greatly appreciated.
thank you!

[Marcecor]

Just to clarify...the above is part of the very 1st Beginner Game tutorial. I like to run it in the Browser and my keyboard is not detected...thank you

[Mikiawm]

Same situation

[zxbobo123]

也是一样的问题，点击A D没有反应