Module Incr_dom_widgets__.Keyboard_event_handler.Handler

A Handler.t handles a keyboard event by returning a Vdom.Event.t. These should be used as building blocks for keyboard event handlers, for instance to handle a specific set of keys.

type t = Incr_dom_widgets.Keyboard_event.t ‑> Virtual_dom.Vdom.Event.t
include sig ... end
val t_of_sexp : Base.Sexp.t ‑> t
val sexp_of_t : t ‑> Base.Sexp.t
val with_prevent_default : t ‑> t

with_prevent_default t handles the event using handler t, and additionally prevents the default handler.

val only_handle_if : ?⁠prevent_default:unit ‑> Condition.t ‑> t ‑> t

only_handle_if ?prevent_default cond t handles the event using handler t if cond ev evaluates to true (and additionally prevent the default handler if prevent_default is passed in), and does nothing otherwise.

val handle_by_case : ?⁠prevent_default:unit ‑> (Condition.t * t) list ‑> t

handle_by_case is similar to only_handle_if, but allows the user to provide a list of handlers and their respective conditions instead of a single one. If multiple handlers' conditions evaluate to true, the first one is used.