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Redy\n\n[![status](https://github.com/ryym/redy/workflows/Test/badge.svg)](https://github.com/ryym/redy/actions?query=workflow%3ATest)\n\nRedy is a yet another [Redux](https://redux.js.org/) wrapper to use Redux with ease.\n\nFeatures:\n\n- Type safe\n- Less boilerplate\n\n## What it looks like\n\n(See the next [Overview](#overview) section for the detailed usage)\n\n### Store\n\nRedy changes:\n\n- how you define action creators\n- how you define a reducer\n\n```typescript\nimport {createStore, applyMiddleware, Dispatch} from 'redux';\nimport {defineActions, effect, defineReducer, on, redyMiddleware, Thunk} from 'redy';\n\nexport type State = {count: number};\n\n// 1. Define action creators.\nexport const actions = defineActions('counter', {\n  Increment: (n: number) =\u003e n,\n\n  Double: () =\u003e {},\n\n  IncrementAsync: effect(\n    ({n, ms}: {n: number; ms: number}): Thunk\u003cState\u003e =\u003e async (dispatch, state) =\u003e {\n      console.log('increment async', state().count);\n      setTimeout(() =\u003e dispatch(actions.Increment(n)), ms);\n    },\n  ),\n});\n\n// 2. Define a reducer.\nconst reducer = defineReducer({count: 0}, [\n  on(actions.Increment, ({count}, n) =\u003e {\n    return {count: count + n};\n  }),\n\n  on(actions.Double, ({count}) =\u003e {\n    return {count: count * 2};\n  }),\n]);\n\n// 3. Create a store.\nexport const store = createStore(reducer, applyMiddleware(redyMiddleware()));\n```\n\n### Component\n\nIt has no differences with the normal Redux usage.\n\n```typescript\nimport React from 'react';\nimport ReactDOM from 'react-dom';\nimport {Provider, connect} from 'react-redux';\nimport {State, store, actions} from './store';\n\ntype Props = {\n  count: number;\n  dispatch: Dispatch;\n};\n\nconst Counter = ({count, dispatch}: Props) =\u003e {\n  return (\n    \u003cdiv\u003e\n      \u003ch1\u003ecount: {count}\u003c/h1\u003e\n      \u003cbutton onClick={() =\u003e dispatch(actions.Increment(3))}\u003e\n        Increment 3\n      \u003c/button\u003e\n      \u003cbutton onClick={() =\u003e dispatch(actions.Double())}\u003e\n        Double\n      \u003c/button\u003e\n      \u003cbutton onClick={() =\u003e dispatch(actions.IncrementAsync({n: 10, ms: 800}))}\u003e\n        Increment Async\n      \u003c/button\u003e\n    \u003c/div\u003e\n  );\n};\n\nconst ConnectedCounter = connect((state: State) =\u003e state)(Counter);\n\nReactDOM.render(\n  \u003cProvider store={store}\u003e\n    \u003cConnectedCounter /\u003e\n  \u003c/Provider\u003e,\n  document.getElementById('root'),\n);\n```\n\n## Overview\n\n### Action creators\n\nRedy lets you define action creators as a group using `deifneActions`.\n\n```typescript\nimport {defineActions} from 'redy'\n\nconst counterActions = defineActions('counter', {\n  Increment: (n: number) =\u003e n,\n  Double: () =\u003e {},\n})\n\nconsole.log(counterActions.Increment(5))\n//=\u003e { type: 'counter/Increment', payload: 5 }\n\nconsole.log(counterActions.Increment.actionType)\n//=\u003e 'counter/Increment'\n```\n\nThe `defineActions`  function converts each function to an action creator.\nIt determines the action type automatically from the function name.\nThus you don't need to define an action type explicitly.  \nAlso Redy recommend not defining a union type of actions.\nWe think a reducer function could be type safe sufficiently without a union type.\n\n### Reducer\n\nRedy provides `defineReducer`  and `on`  to create a reducer in type-safe manner without an action union type.\n\n```typescript\nimport {defineReducer, on} from 'redy'\nimport {todoActions} from './actions'\n\nconst initialState = []\nexport const reducer = defineReducer(initialState, [\n  on(todoActions.Add, (todos, { id, title }) =\u003e {\n    const todo = { id, title, completed: false }\n    return [...todos, todo]\n  }),\n\n  on(todoActions.Remove, (todos, id) =\u003e {\n      return todos.filter(todo =\u003e todo.id !== id)\n  }),\n\n  // on(actionCreator, (state, payload) =\u003e state)\n])\n\nconsole.log(reducer(undefined, {type: '_init_'}))\n//=\u003e []\n\nconsole.log(reducer([], todoActions.Add(1, 'Buy milk')))\n//=\u003e [{id: 1, title: 'Buy milk'}]\n```\n\nAdditionally Redy provides `onAny` to handle multiple actions with a single handler.\n\n```typescript\nimport {defineReducer, onAny} from 'redy'\nimport {actions} from './actions'\n\ndefineReducer({}, [\n  onAny([actions.FetchFollowerDone, actions.FetchFolloweeDone], (users, {user}) =\u003e {\n      return {...users, [user.id]: user}\n  })\n])\n```\n\n### Effect\n\n[redux-thunk]: https://github.com/reduxjs/redux-thunk\n\nRedy uses the [redux-thunk][redux-thunk] pattern for effect handling.\n\n```typescript\nimport {defineActions, effect, Thunk} from 'redy'\nimport {User, userApi} from './user'\n\ntype State = {[id: number]: User}\n\nconst userActions = defineActions('users', {\n  Fetch: effect(\n    (id: number): Thunk\u003cState\u003e =\u003e async (dispatch, getState) =\u003e {\n      const users = getState()\n      if (users[id] == null) {\n        const user = await userApi.findById(id)\n        dispatch(userActions.FetchOk(user))\n      }\n    }\n  ),\n\n  FetchOk: (user: User) =\u003e user,\n\n  // ...\n})\n```\n\n### Store\n\nThe only thing you need to do is applying `redyMiddleware`.\nIt handles the effect actions.\n\n```typescript\nimport {Store, applyMiddleware, createStore} from 'redux'\nimport {redyMiddleware} from 'redy'\nimport {reducer} from './reducer'\nimport {State} from './state'\n\nexport const configureStore = (): Store\u003cState\u003e =\u003e {\n  return createStore(reducer, applyMiddleware(redyMiddleware()))\n}\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fryym%2Fredy","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fryym%2Fredy","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fryym%2Fredy/lists"}