Switch to new way of react-redux | Fastest way to create and use redux

React JS is the most used front-end development technology. The reasons behind react js popularity is its simplicity, ease to use, performance, extensions, debugging, and many more.

We all know, React JS provides uni-directional data flow. When we are creating a simple small project, we do not need a global state. But for large projects, It is very hard to manage all states. So we use redux to create a global state.

Redux JS is a library and pattern for react js applications to manage a centralized state. We can create a store, where we can have multiple states. Redux configuration needs a store, reducers, actions, and action types.

To simplify creating and using redux, we have a library called redux-toolkit. Redux toolkit is used for faster and efficient redux development.

What is Redux Toolkit?

When we are redux in our project, We have to create 4 files, many packages, and lots of configurations. For most people, it becomes overly complicated. These problems can be solve using the redux toolkit. Redux toolkit is a simple and powerful package.

Installation and configuration:

Redux toolkit is available on NPM and we can install this package using npm or yarn. We also need react-redux.

npm install @reduxjs/toolkit react-redux
# or
yarn add @reduxjs/toolkit react-redux

Demo APP:

In this demo app, we are going to create a simple counter app. You can create a react JS project using create-react-app.

First, we need to create a store for redux using redux toolkit.

// src\redux\store.js

import { configureStore } from '@reduxjs/toolkit'

const store = configureStore({
  reducer: {},
})

export default store

Currently, we have not created any reducer (Slice). So we will add reducers later.

Add a store to the app:

Now, We will import the store in index.js and provide a store to our react app using the provider.

//src\Redux\counterSlice.js
import React from"react";
import ReactDOM from"react-dom";
import"./index.css";
import App from"./App";
import store from"./redux/store";
import { Provider } from"react-redux";

ReactDOM.render(
  <Providerstore={store}>
    <App/>
  </Provider>,
  document.getElementById("root")
);

Create a counter slice:

Now, we will create a counter slice and add some actions like increment, decrement, and add amount.

import { createSlice } from '@reduxjs/toolkit'
const initialState = {
  amount: 0,
}
export const counterSlice = createSlice({
  name: 'counter',
  initialState,
  reducers: {
    increment: (state) => {
      state.amount += 1
    },
    decrement: (state) => {
      state.amount -= 1
    },
    addAmount: (state, action) => {
      state.amount += action.payload
    },
  },
})
export const { increment, decrement, addAmount } = counterSlice.actions
export default counterSlice.reducer

Add a counter slice to the store reducer:

// src\redux\store.js
import { configureStore } from '@reduxjs/toolkit'
import counterReducer from './counterSlice'
const store = configureStore({
  reducer: { counterReducer },
})
export default store

All done, Our redux configuration is done. Now we can use actions **(increment, decrement, addAmount) **and state (amount).

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Use Actions and state:

First, we need to create a UI for all actions. I have created where we have a screen to show the amount in the state, increment and decrement buttons, and input for the amount to add.

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So, I have added events for the increment, decrement, and add button.

import './App.css'
import { useState } from 'react'
import { useDispatch, useSelector } from 'react-redux'
import { increment, decrement, addAmount } from './redux/counterSlice'
function App() {
  const [value, setValue] = useState(0)
  const amount = useSelector((state) => state.counterReducer.amount)
  const dispatch = useDispatch()
  const handleIncrement = () => {
    dispatch(increment())
  }
  const handleDecrement = () => {
    dispatch(decrement())
  }
  const handleAddAmount = () => {
    dispatch(addAmount(value))
    setValue(0)
  }
  return (
    <div className="app">
      <div className="text-center">
        <h1>Redux toolkit example</h1>
        <h6>Simple counter</h6>
        <div className="display-2 my-3">{amount}</div>
        <div className="my-4">
          <button className="btn btn-success" onClick={handleIncrement}>
            + Increment
          </button>
          <button className="btn btn-danger ms-2" onClick={handleDecrement}>
            + Decrement
          </button>
        </div>
        <div>
          <input
            type="number"
            className="form-control"
            value={value}
            onChange={(e) => setValue(parseInt(e.target.value))}
          />
          <button className="btn btn-primary mx-auto mt-2" onClick={handleAddAmount}>
            ADD
          </button>
        </div>
      </div>
    </div>
  )
}
export default App

That's all, we have completed the redux toolkit configuration.

Code: https://github.com/gyanendraknojiya/redux-toolkit-example

If you have any queries, feel free to contact me: https://gyanendra.tech/#contact

Thank you!