redux-automap

Redux helper library to greatly reduce action+reducer definition boilerplate.

Works with sagas, thunks, reselect, etc

Why?

Because much of the redux boilerplate (defining consts, logic in reducers to match actions to reducers, etc) really isn't necessary if you define actions with matching reducers together.

Installation

npm install redux-automap

Dependencies

None

Usage

import { automap } from 'redux-automap';

const todos = automap({
  initialState: [],
  actionReducers: [
    {
      addTodo: text => ({ type: 'ADD_TODO', text }),
      reducer: (state, action) => [ ...state, action.text ]
    },
    {
      clearTodos: () => ({ type: 'CLEAR_TODOS' }),
      reducer: state => []
    }
  ]
});

/*

todos === {
  actions: { // exposed for access to action creators
    addTodo,
    clearTodos
  }

  reducer: (state, action) // exposed as the main reducer for each branch
}


*/

const { addTodo, clearTodos } = todos.actions;
const washClothesAction = addTodo('wash clothes'); // { type: 'ADD_TODO', text: 'wash clothes' }
const foldClothesAction = addTodo('fold, clothes'); // { type: 'ADD_TODO', text: 'fold clothes' }


let state = [];
state = todos.reduce(state, washClothesAction); // state === [ 'wash clothes' ]
state = todos.reduce(state, foldClothesAction); // state === [ 'wash clothes', 'fold clothes' ]
state = todos.reduce(state, clearTodos());      // state === [ ]

Example (allows multiple actions routing through a shared reducer)

import { automap } from 'redux-automap';

const category = automap({
  initialState: 'dogs',
  actionReducers: [
    {
      setCategory: category => ({ type: 'SET_CATEGORY', category }),
      setCategoryToBirds: () => ({ type: 'SET_CATEGORY', category: 'birds' }),
      reducer: (state, action) => action.category // both actions will use this shared reducer
    }
  ]
});

const { setCategory, setCategoryToBirds } = todos.actions;

let state = 'dogs';
state = todos.reduce(state, setCategory('cats'));  // state === 'cats'
state = todos.reduce(state, setCategoryToBirds()); // state === 'birds'

Changelog

v1.1.0 - added ability for multiple actions paired to one reducer