Reactions track read calls and provide a way to react if they change.
- Read calls are tracked by passing a function to
track
. That function will be executed, and any read calls made during that execution will be tracked and associated with this reaction. - Reactions can be subscribed to by passing a callback to
subscribe
. That callback will be executed whenever any of the read calls associated with this reaction change.
Methods#
track()#
track<T>(cb): T;
Execute the callback and track all engine read calls that happen during the execution. These read calls are associated with this reaction.
Type Parameters#
Type Parameter |
---|
T |
Parameters#
Parameter | Type |
---|---|
cb | () => T |
Returns#
T
subscribe()#
subscribe(cb): () => void;
When the Reactor detects that the engine read calls associated with this reaction might have changed, it will invoke the subscription handler.
Parameters#
Parameter | Type |
---|---|
cb | () => void |
Returns#
A function that can be called to unsubscribe the handler.
(): void;
Returns#
void
dispose()#
dispose(): void;
Unsubscribe all handlers, nullify the reference to the Reactor and dispose the reaction.
Returns#
void