Should I learn Redux if I know React and why should I learn it?

Redux is a JavaScript library developed by Facebook but the it was open-sourced in 2015. It is now used by many companies, including YouTube and Airbnb. The key idea behind Redux is that all of your code should do one thing, and that thing should be managing state – which means you can manage your different components with different logic with ease.

Some people may see Redux as a way to write more complex React applications as it handles state. Others may see it as a way to migrate old applications from React or Angular to something advanced for the future with less risk of rewrite.

When to use redux vs Context?

Redux works by holding the previous state of your application in a store and the next state in a reducer function. When an action is dispatched to your app, it checks if there is any data stored on the store that matches up with it.

If there is no data found then it will just have no effect on your app as you are trying to achieve only one thing – for example, logging out or finishing a request for payment.

There are many ways to accomplish these tasks with Redux, but the basic structure is that you just need to implement a reducer function and then call it when an action is dispatched.Reducers contain functions that take in the current state of your application and produce a new state.

Reducers are meant to be thin, meaning they should just perform their one job. If they get too complicated then you should go back and refactor.

How to Get Started with Redux

If you are just getting started with Redux, we recommend that you try out the Getting Started section of the website.

It will walk you through setting up your project using the command line and then using React router for routing. You may also want to check out tutorials for other popular frameworks like Vue or Angular. .

If you want to learn more about the history of Redux, there are a number of articles on our website. that may interest you. We also have a tutorial on how to build a Flux application using Redux.

Execute the following command in the terminal/command prompt to create a new React project using create-react-app:

npx create-react-app redux-demo

npx package help to install any package with the help of internet.

How to Create the Redux Store

To create a store from redux, we need to import and destructor the createstore.

import { createStore } from 'redux';

createStore also know as reducer.

createStore accept a function which will accept a state and action. according to action, all the action will perform in redux.

import { createStore } from 'redux';

const reducer = (state, action) => {
  console.log('reducer called');
  return state;
};

const store =createStore(reducer);

How to Change the Store

dispatch()

The only way to change the store is by dispatching actions.

Subscribe()

Here, using the subscribe function, we’re registering a callback function that will be called once the store is changed.

getState()

getState() method will help to get the current value of the state.