Vue.js version

2.0.3

Reproduction Link

https://jsfiddle.net/crswll/5yynzyj3/

Steps to reproduce

Focus the input and try using W, A, S or D to trigger key up instead of UP, RIGHT, DOWN and LEFT.

What is Expected?

I expected to be able to hit W or UP to trigger up2, A or LEFT to trigger left2, S or DOWN to trigger down2, D or RIGHT to trigger right2.

What is actually happening?

Nothing. I thought it would work because of this line from the source but it doesn't...

Also, kind of a side note:

Can we overwrite the default keyCodes? I'd rather name my custom alias up instead of up2.