barren

A lightweight state management for React

install

npm i barren

usage

On the main/entry React component

import StoreProvider from 'barren/lib/provider'
 
import createStore from 'barren/lib/createStore'
 
// should be imported elsewhere
const ACTION_STORE = {
    counter: function(param) {
        if(param === 'add') {
            this.STORE['counter'] += 1
        }
        if(param === 'reduce') {
            this.STORE['counter'] -= 1
        }
    }
}
 
// should be imported elsewhere
const STORE = {
    counter: 0
};
 
const barren = createStore(ACTION_STORE, STORE)
 
ReactDOM.render(
    <StoreProvider {...barren}>
      <App />
    </StoreProvider>,
document.getElementById('root'))

On children component

import store from 'barren'
 
function App(props) {
  const { store } = props 
 
  const count = store.fetch('counter')
 
  function add(){
    store.dispatch('counter', 'add')
  }
 
  function reduce(){
    store.dispatch('counter', 'reduce')
  }
 
  return (
    <div style={{display: 'flex'}}>
      <button onClick={reduce}> - </button> {count} <button onClick={add}> + </button>
    </div>
  );
}
 
export default store(App)

async

Usage sample using axios

import { request, setConfig } from 'barren/api/axios-api'
 
setConfig({ baseURL: 'https://api.github.com/search'})
 
const ACTION_STORE = {
  users: function(params = {}){
    const {
      users = 'tom',
      repos = 1,
      followers = 1
    } = params
    const query = `users?q=${users}+repos:>${repos}+followers:>${followers}`
    return request(query)
  }
}
 
const STORE = {
  // to process output from ACTION_STORE use function
  users: function(result = {}){
    const {  
      total_count = 0, 
      items = []
    } = result
    return {
      usersCount: total_count,
      userList: items
    }
  }
}

On children component

import store from 'barren'
 
function App(props) {
  const { store } = props 
 
  const userCount = store.fetch('users', 'usersCount')
  const userList = store.fetch('users', 'userList')
 
  const [input, setInput] = useState('')
 
  const onChange = e => {
    setInput(e.target.value)
  }
 
  function searchUsers(){
    store.dispatch('users', { users: input })
  }
 
  return (
    <div>
      <input onChange={onChange}/>
      <button onClick={searchUsers}>search github users</button>
      <p>users count: {userCount}</p>
      <pre>
        {userList && userList.length && JSON.stringify(userList, false, 2)}
      </pre>
    </div>
  )
}
 
export default store(App)

api

store.dispatch(action, params, options, caller)

dispatch an action from ACTION_STORE

• action: (object) A valid string identifier, should be unique.
• params: (any types) Parameter to pass to the dispatcher event reference.
• options: (object, optional) Options parameter for the dispatcher.
• caller: (function, optional) Callback function to run after the dispatcher event finish.

options parameter

• forceRewrite (boolean) Force rewriting the store cache on request.
• shallowUpdate (boolean) Once request is made do not cache to the store.
• timeout (integer) Custom timeout for for dispatcher request.
• event (boolean) Dispatch as event to listeners.
• inflightRequestCancellation (boolean) Assign request cancellation handler to the dispatcher.

store.fetch(action, param)

fetch result from STORE

• action: (string) A valid string identifier, should be unique.
• param: (string, optional) Property name of the result if is a valid object.

store.clearCache(action)

flag an action to process next request

• action: (string) A valid string identifier, should be unique.

store.clearAllCache()

flag all actions to process all incoming request

store.overrideStore (action, value)

override the store cache value

• action: (string) A valid string identifier, should be unique.
• value: (any types) New value for the reassignment.

forceEvent (event, params)

forcefully emit an event

• event: (string) A valid string identifier, should be unique.
• params: (any types) Value to pass to the event.