A Redux library for restricting and synchronising action-creator execution
A common pattern in Redux is using flags to signal that an asynchronous action-creator is currently executing or has been executed, the flags are used to prevent action-creators running simultaneously or to prevent them from running multiple times. redux-latch provides a set of higher-order actions which enable you to handle these situations more declaratively.
As an example say you have an action-creator which you want to only run once after the user has logged in, it might look something like this:
createEnsure higher-order action provided by redux-latch you can remove the ad-hoc flags from the store, and simplify the action-creator so that it simply performs the fetch:
createEnsure on this action-creator will return a new action-creator which wraps the original and ensures that it is only ever executed once.
Then in your code, just use the
ensureUserPermissions action-creator to trigger the fetch instead. redux-latch maintains all of its state inside the redux store, so isomorphism and time-travelling are both handled.
You need to initialise the latch reducer where redux-latch will hold its state, by default redux-latch will expect this to be located at
state.latches, however this can be overridden.
redux-latch also depends on the redux-thunk middleware being present.
Will enhance the action-creator so that it is never called more than N times. You can also specify the number of concurrent exections allowed. The function returns a
Latch object with an
execute method to trigger the action-creator and an
invalidate method to reset the latch.
Just returns the execute methods of the latch. Useful if you never want to call