redux-decorated

Helpers for Redux designed to work great with Typescript.

You describe the possible actions using an object as such:

const actions = {
  addTodo: {type: 'addTodo'} as Action<{todo: Todo}>,
}

If you don't want to repeat the type you can use the createActions helper which will automatically set the type key from the key of the actions object:

import {createActions} from 'redux-decorated'

const actions = createActions({
  addTodo: {} as Action<{todo: Todo}>,
})

To get type information in the reducers, use the createReducer function:

import {createReducer} from 'redux-decorated'

export const todos = createReducer<Todo[]>([]) // Initial state is passed in the parameter
  .when(actions.addTodo, (state, {todo}) => [...state, todo])

the createReducer function returns a "buildable reducer" which you can add action handlers too by chaining .when calls. The first parameter is the action object and the second is a function that receives the previous/current state as the first parameter, the action payload as the second and is expected to return a new state object. Both the state and the payload arguments gets fully type-infered by Typescript which gives you the usual benefits with autocomplete and warnings.