Tutorials on React Hooks

The useCallback hook returns a memoized callback that only changes if one of the dependencies has changed. This helps us to avoid unwanted and unnecessary components re-renders. The basic syntax for the useCallback hook is: You don't need any additional typings since TypeScript knows that…

The Fullstack React with TypeScript Masterclass is now live! 🎉 This Masterclass teaches you practical React and TypeScript for developing apps from idea to completion, along with all the important tools in the React ecosystem. It expands on the material taught in our comprehensive book, Fullstack…

Managing state in large React applications is difficult. Determining what state belongs locally to a component, what data a component receives from props, how much logic needs to be decoupled from a component, etc. directly affects an application's maintainability. One issue most developers face…

We are continuing the tutorial series on React Hooks. Join Paige in today's tutorial as she teaches you all about the useRef hook, how it works, and how to use it in your own React apps. React refs help you imperatively modify the DOM outside the normal flow of component rendering. Here are some…

We have the third tutorial in our 6 part YouTube series on React Hooks. (ICYMI - You can check out Part 1 - Introducing Hooks and Part 2 - useState Hook). Now we're on to the useEffect hook, an incredibly useful hook that allows you to handle side effects such as API calls or modifying the DOM in…

Here is the second tutorial in our 6 part YouTube series on React Hooks. We've already seen that React Hooks are arguably the biggest fundamental change to happen to React since its inception. Learning Hooks brings you up to speed with this important update to React. Now in this second tutorial, we…

Function components have come a long way since React v0.14. Introduced as a simpler syntax for defining stateless, presentational components, function components can now handle state via the useState Hook. This means you can define any component, stateful or stateless, with functions, and you no…

Developers of the most popular React Hooks libraries rely on tests to enforce the overall quality of their libraries' code. Tests cover a wide variety of different use cases, give developers confidence that everything works as intended and serve as a form of documentation. Anytime a test fails,…

Ever since the introduction of Hooks into the React library, creating cleaner, reusable components has become much easier. Instead of using render props and higher-order components, Hooks provide us a way to share stateful logic across multiple components without making any modifications to an…

Creating large, long-lived React apps, such as those required in large enterprises, poses unique challenges. Most developers lack the knowledge of how to build apps that scale gracefully and use the latest React techniques, such as React Hooks and React Testing Library, to modernize React apps in…

As one of the most popular music streaming services, Spotify encourages developers to craft new and engaging experiences for music lovers around the world. With over seventy endpoints, Spotify's Web API allows external applications to access Spotify's vast catalog of albums, artists, playlists,…

In previous posts we learned: In this post, we're going to write tests for a custom React hook. We're going to create a custom hook that will uppercase a given text string. This hook will be connected to an input and whenever a user changes the input value this hook will automatically uppercase the…

As the most starred open source, JavaScript library/framework repository on GitHub, Vue.js has become a top three front-end technology alongside React.js and Angular in terms of popularity, usage, ecosystem activity and developer satisfaction. Compared to React.js and Angular, Vue.js is…

React Hook Form is a library that helps you to simplify form validation. It uses React hooks to inject required validation checks and to bind a form and a submit handler. Let's create a signup form with React Hook Form and then type it with TypeScript. Out form will contain 3 fields:

In this article, we will learn how to handle file uploads using react-hook-form.

There are 2 hooks to handle side-effects in React: The first one fires after layout and paint, during a deferred event. The second one works synchronously before the next paint, and used to handle effects that are visible to a user. The useEffect hook accepts 2 arguments:

The useReducer hook is a hook that allows you to create a state, update it, and share its data across different components. (Its core logic is similar to Redux.) It takes a reducer-function and an initial state as arguments and returns a tuple of a new state and a dispatch function. The reducer…

Refs provide a way to access DOM nodes or React elements created in the render method. Also, they can be used to store some references to entities or objects for accessing them later. To use refs with functional components use a special useRef hook. It is a generic function, so we can pass a…

React Context provides a way to pass data through the component tree without having to pass props down manually at every level. Use it when you need to share data “globally”, between many components on different levels to a component tree. To create a context use React.createContext:

When you need to store some data that won't be shared across components you can use the local component state. To use state in functional component use useState hook. This hook returns a tuple of two values. The first one is the current value of the state, the second one is a function to update the…

In this post, we will discuss the useEffect hook offered to us by React Hooks which lets us perform side effects in function components.