Beyond the core functionality described above, SLAYER provides a set of
convinient functions written in Guile Scheme. They're contained in the
(extra slayer) module.
— Procedure: key name fun
Call fun every 30 milliseconds as long as the key named name
is pressed.
— Procedure: keydn (modifier target) action
This version of keydn extends the core binding. It allows to bind
actions not only to keys, but also to their simple combinations, like
(ctrl z).