Modify action in listener middleware

[mauriceoc]

Just wondering if there's a way to safely modify an action in redux-toolkit listeners?

It seems from the doc like they only respond to actions.

middleware.startListening({
     matcher: myMatcher,
     effect: (action, api) => {
           // modify the action somehow here
     }
});

Is custom middleware required in order to modify actions?

[EskiMojo14]

Listeners are called after the action already reached reducers, so it's not possible to intercept and replace the action.

You would need to write a custom middleware for that :)