Function composeMiddleware

src/factory/createReducer.ts:15–21

(chain: Middleware<Action, State>[])

) => (next: Dispatch<Action>) => (action: Action) => void;

function composeMiddleware<Action, State>(chain: Middleware<Action, State>[]) {
  return (context: Store<Action, State>, dispatch: Dispatch<Action>) => {
    return chain.reduceRight((res, middleware) => {
      return middleware(context)(res);
    }, dispatch);
  };
}

const createReducer = <Action, State>(...middlewares: Middleware<Action, State>[]) => {
  const composedMiddleware = composeMiddleware<Action, State>(middlewares);