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sha256=7f1fa83287458114c5b0cab8aae00d69972d15e1d20a446ce13f246aacef3216
doc/virtual_dom.ui_effect/Ui_effect/index.html
Module Ui_effect
Source
'a Effect.t
represents some computation of type 'a
that can be performed outside of the typical computational/incremental structure of a Bonsai program . Examples of this computation might be:
- Calling an RPC and getting the result back
- Running expensive computation on a web-worker thread
- Requesting some information from the imperative "Start.Handle"-holding code
If you have a value of type 'a Effect.t
, you can schedule it to be run by calling inject
and providing a function that will be called when the callback completes.
include Core.Monad.S with type 'a t := 'a t
module Monad_infix : sig ... end
val return : 'a -> 'a t
module Let_syntax : sig ... end
If creating an effect could be expensive, you can wrap its construction in a lazy and pass it to this function so that its construction will be deferred until it's about to be evaluated.
Prints the sexp when scheduled.
of_sync_fun
is similar to of_deferred_fun
but with a synchronous function instead of a deferred one. This can be used for functions that are synchronous but side-effecting, or as a mock-function in tests that replace the usages of of_deferred_fun
in the actual app.
Note that, unlike of_deferred_fun
, the function must return immediately, so it's not possible to test the behaviour of tour app between calling the function and the effect becoming 'determined'. If you need to do this, see of_svar
and of_query_response_tracker
below.