i try to used crtl +shift + J and got this error
Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/.
VM167:2 'webkitMovementX' is deprecated. Please use 'movementX' instead.
VM167:2 'webkitMovementY' is deprecated. Please use 'movementY' instead.
how to resolved this....