redux-allow-deny

Redux middleware to execute a callback on action types using a allowlist or denylist approach

Installation

npm install --save redux-allow-deny

Usage

Both the allowlist and denylist methods expect two parameters:

1. Actions (array) array of action types (string) to check against
2. callback (function)

The callback is passed two parameters:

1. Action (object) the current action
2. state (object) the state object with the methods getState and dispatch

Example

Note: recommended to move the middleware creation into a separate file

import { createStore, combineReducers, applyMiddleware, compose } from 'redux'
import * as reducers from '../reducers'
import * as wb from 'redux-allow-deny'
import {
  CREATE_SHORTLIST,
  EDIT_SHORTLIST,
} from '../constants'
const reducer = combineReducers(reducers)
//the callback function passed action and state
function logShortlistActions(action, state) {
  console.log(`ACTION: ${action.type}`)    
}
//create middleware to execute the callback if an Action has type 'CREATE_SHORTLIST' or 'EDIT_SHORTLIST'
const allowlist = wb.allowlist([CREATE_SHORTLIST, EDIT_SHORTLIST], logShortlistActions)
// standard redux boilerplate:
const createStoreWithMiddleware = compose(
  applyMiddleware(allowlist)
)(createStore)
export default function configureStore(initialState) {
  return createStoreWithMiddleware(reducer, initialState)
}

denylist method works exactly the same

const denylist = wb.denylist([CREATE_SHORTLIST, EDIT_SHORTLIST], logActionIfNotShortlist)

The methods can be exported individually:

import {allowlist} from "redux-allow-deny"
const allowlistMiddleware = allowlist([ACTION_1, ACTION_2], callback)

Credit

Inspired by: github.com/michaelcontento/redux-storage