The shortcuts also do not work properly on the most common US QWERTY layout (eg. the "-" key does not). They do work on most EU layouts though, where eg. "-" i

The shortcuts also do not work properly on the most common US QWERTY layout (eg. the "-" key does not). They do work on most EU layouts though, where eg. "-" is placed left of Right Shift (on US QWERTY it is right of "0"), which likely indicates the author made this using some EU keymap... As a guess, this is using deprecated keycodes [1] instead of just characters. [1]: https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/keyCode https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEve...