Unknown key in key combo

The last part of a combo must be a single character, a named key (enter, escape, tab, up, pagedown, space, …) or a function key (f1–f12).

// BeforeuseKeymap({ "ctrl+return-key": submit });// AfteruseKeymap({ "ctrl+enter": submit });

Sequences are space-separated strokes ("g g"). Alternatives are comma-separated ("j, down").