reswitch ^v1.0.0

A tiny library to write friendly reducers with less boilerplate.

Install

yarn add reswitch or npm install reswitch --save

Usage

Its usage couldn't be simpler: you pass as much arguments as you need to the reswitch function, being the odd ones the actions dispatched and the even ones the state the action will return:

/* /reducers/users.js */

import reswitch from 'reswitch'
import {USERS_GET, USERS_GET__SUCCESS, USERS_GET__FAILURE} from 'consts/users'

const INITIAL_STATE = {areLoading: false, hasError: false, users: null}

const users(state = INITIAL_STATE, action) => reswitch(
  USERS_GET,
    {...defaultState, areLoading: true},

  USERS_GET__SUCCESS,
    {...defaultState, areLoading: false, users: action.users},

  USERS_GET__FAILURE,
    {...defaultState, areLoading: false, hasError: true}
)(state, action.type)

export default users

Arrays are also welcomed:

reswitch(
  ADD_TODO,
    [...state.todos, action.todo]
)(state, action.type)

As well as a function:

reswitch(
  REMOVE_TODO,
    () => state.todos.filter(todo => todo.id !== action.todo.id)
)(state, action.type)

The default action is the current state of your reducer. You can customise it by just passing an object, array or function as the last argument of reswitch, without any explicit action:

reswitch(
  ADD_TODO,
    [...state.todos, action.todo],

  () => sort(state.todos)
)(state, action.type)

That's it.

Tests

yarn test or npm test

Motivation

I personally don't like those huge amounts of switches. Tokens out and about, needless. Too much verbosity. To describe what I'm saying, this:

Becomes this:

License

MIT