actiontypemiddleware

This middleware allows you to subscribe to a redux-store on a case-by-case basis depending on what type of action has been called. It's super easy to use and is useful for various scenarios including unit testing

Installation

npm install ---save-dev actiontypemiddleware

Properties

middleware

(function) the main middleware function

subscriptions

(object) the list of subscriptions to the middleware

Methods

subscribe(name, type, callback)

name: (string) the name of the subscription. Multiple action types can be subscribed under the same name.

type: (string) the redux action type.

callback: (function) the callback function invoked whenever the subscribed action is dispatched to the store. The callback accepts an object of the following structure: {timestamp: date in milliseconds, action: dispatched action}

unsubscribe(name)

name: (string) the name of the subscription to remove.

unsubscribeAction(name, type)

name: (string) the name of the subscription.

type: (string) the specific action type to unsubscribe from under this name. If there is only one action subscribed under this name then it will remove the entire subscription

Usage

The following usage assumes you are familiar with redux actions and redux stores. For further information please refer to this excellent documentation.

The middleware works on a subscription based model, meaning you can turn it on and off at will.

import ACTIONTYPEM from 'actiontypemiddleware'
import { createStore, applyMiddleware } from 'redux'
import reducers from './reducers'

/* import this object wherever it's needed and turn it on and off to listen for actions */
export const signOutButton = {
    on() {
        ACTIONTYPEM.subscribe('signout', 'USER_SIGN_OUT', signOutButton.listener)
    },
    off() {
        ACTIONTYPEM.unsubscribe('signout')
    },
    listner({timestamp, action}){
        console.log(`someone signed out at: ${timestamp}`)
        console.log('the action data is', action)
    }
}

export default createStore(reducers, applyMiddleware(ACTIONTYPEM.middleware))