Understanding Redux: A tutorial with examples LogRocket Blog



Redux has its moments – not least in how Waters’ weathered, character-filled voice inhabits and adds weight to his original lyrics – but sometimes, less really is more. Well, yes, but https://deveducation.com/ so is everything at scale if you don’t abstract common patterns out. To get started, Redux is actually pretty compact, way more so than public opinion will make you believe lately.

why redux

Redux DevTools makes it easy to take advantage of all Redux has to offer. Besides logging, it has great DevTools that allow you to time travel actions, persist actions on page refresh, and more. The reducer in Redux is a normal, pure function that takes care of the various possible values of state using the switch case syntax. But that means several things need to be taken care of — most importantly, keeping the state immutable. For example, to share data among siblings in React, a state has to live in the parent component.

Understanding Redux: A tutorial with examples

We will represent this initialState as a second argument passed into the createStore. With a real-life example, we understood the principles and some common terminologies of Redux but how to introduce all these things in an application? To deepen your fundamental concepts in Redux let’s take an example of a simple React application, and why redux we will refactor the app to introduce Redux in it. You’re aware that there is a process that you need to follow to withdraw your money. When you talk to the cashier, he takes some time, checks some details, enters some commands, and hands over the cash to you. Let’s relate this example to Redux and understand some of its terminologies.

I believe that like event-sourcing, you should only dispatch events. It dispatches an action that tells the App that it is updating, and then performs an async call. After the call finishes, the provided value is dispatched as a payload of another action. Context API is very specific to the react-redux part on how React components are connected to the store. But if you want to, since Context is officially supported, you could use the Context API instead of react-redux.

React Context vs React Redux, when should I use each one? [closed]

If you don’t need those benefits then you might just be better-off doing writing ad-hoc JS. If performance happens to be a concern, the most effective way to enhance performance will be to skip unwanted re-renders such that components re-render only when their data has been modified. Lots of performance optimizations are implemented by React Redux internally such that your component re-renders only when it is imperative to do so.

  • To keep our code DRY we need to look at the new term Action Creators.
  • And it’s absolutely valid – Redux allows you to make data available to deeply nested component trees without having to pass it through all the levels as props.
  • There’s certainly value in not reinventing a wheel that’s very hard to get round, and a wide perspective of the problem would include full-stack frameworks even if they only offer a 99% solution to this.