[selimco]

I think space is usually the key that performs a click on focused buttons, not enter.

[meindnoch]

It's up to the user agent. On one platform it's the spacebar, on another it's the return key. Of course, fake controls written in JS wouldn't be able to do this. Which is why it's the wrong thing to do.

[two_handfuls]

I was talking about the default button (typically blue, activated with enter), not the currently focused button (outlined, space).