Redut

Redut is a minimal library to build type-safe redux applications with TypeScript and without a lot of boilerplate code. Actually it provides two helper functions (createAction, createReducer) and one helper type (ActionOf).

Example

counterActions.ts:

import { createAction } from 'redut';

// actions without payload
export const increment = createAction('INCREMENT')<void>();
export const decrement = createAction('DECREMENT')<void>();

// actions with payload
export const incrementBy = createAction('INCREMENT_BY')<number>(); // `number` is a type of payload
export const decrementBy = createAction('DECREMENT_BY')<number>();

counterReducer.ts:

import { createReducer } from 'redut';
import * as counterActions from './counterActions';

type CounterState = number;

export const counterReducer = createReducer<CounterState, typeof counterActions>(
    0, // initial state
    {
        [counterActions.increment.type]: state => state + 1,
        [counterActions.decrement.type]: state => state - 1,
        [counterActions.incrementBy.type]: (state, action) => state + action.payload,
        [counterActions.decrementBy.type]: (state, action) => state - action.payload     
    });

No more verbose actions and action creators, no more switch/case reducers, no more extensive usage of string literals and full type safety!