Note that `event.which` is deprecated and itself uses deprecated properties

[dmethvin]

See jquery/jquery#2667

[AurelioDeRosa]

Should be set this as deprecated now considering the very low support of the new standard?

[dmethvin]

Here is the caniuse.com info for KeyboardEvent and it looks like the deprecated keyCode still wins by a mile, so you may be right.

[mgol]

We've decided to not mark this API as deprecated in the end as there's no direct native replacement. See jquery/jquery#4755 (comment).