The simplest error handling middleware for Redux

error-middleware.ts

import { Action, AnyAction, Middleware } from 'redux';

const errorMiddleware: Middleware =
  store =>
    next =>
      (action: AnyAction) => {
        if (action.error instanceof Error) {
          store.dispatch({
            type: '@@internal/EXCEPTION_THROWN',
            payload: action.error.message,
          })
        }

        return next(action);
      };