React is one of the web’s most popular frameworks for building JavaScript applications. 

If you know what you’re doing, React can drastically simplify how you build, use, and maintain code.

Whether you’re a React newbie or you’re ready for advanced techniques, you can level-up with egghead. Explore our in-depth courses, lessons, and community resources to build more powerful applications and crack open your career.

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Learn React

Developing logic-rich applications is a key skill to have.

The TypeScript–React combination helps you unlock that skill, and it’s a great developer experience in terms of writing understandable and refactorable HTML. But the default state management for React has a long way to go to feel simple and maintainable — and that’s where MobX makes your life so much easier. MobX keeps things simple without using complicated setups like `provider` and `connect` that provide way too little value for all the mental overhead. 

In this course, you’ll see how to model your React application logic using simple JavaScript classes — and with the help of MobX, make those classes the beating heart of your React applications. You’ll learn:

- that you don't need advanced annotations and TypeScript features to use MobX
- how to easily refactor code through TypeScript
- how to use TypeScript to track the flow of state as properties change

Develop React Applications with Mobx and TypeScript

In the course, we will learn how to use the `styled-components` library to style our React applications. We will start from the basics and dwell in more advanced cases.

With this course, you can get the necessary knowledge to use the `styled-components` library to style your React applications in the future.



Styling React Applications with Styled Components

In this collection, we build a minimal flashcard application using React, primarily focusing on function components and the hooks API. To make sure we can understand and maintain existing code, there are also a few lessons toward the end that use class components so you can get familiar with the syntax. We cover important React concepts, and sprinkle in libraries that are pretty standard in the ecosystem like @reach/router, Jest, and React testing library. We start with create-react-app so we can get right into it without worrying about configuring tooling. There's [a separate course for that here](https://egghead.io/courses/modern-javascript-tooling-with-react?af=5mx0ie)

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Build a React App with the Hooks API

GraphQL is a fan favorite for good reason. It lets a client make specific, complex, and/or aggregate queries for data, and it’s user-friendly to boot.

If you’ve been meaning to learn GraphQL and start harnessing its powers, this is a great place to start.

This course is for GraphQL newbies with a basic understanding of React. It focuses on the client-side implementation of GraphQL usage using the Apollo client.

We’ll start with a guide on how to add the Apollo client to an existing project, then move on using the Query and Mutation components to fetch and manipulate data using a GraphQL API.

GraphQL Data in React with Apollo Client

Working with forms can be laborious, but redux-form takes out the tedium and replaces it with an enjoyable way to create beautifully crafted forms. You get the benefit of integrating form state with an existing Redux application, plus the ability to track the state of your form with precision in Redux DevTools, without writing lots of boilerplate code.

In this course, we will use the redux-form package to create a form whose state is easy and enjoyable to manage. Over 46 minutes and 14 lessons, we will:
* find out how redux-form ties into a React/Redux application
* learn how to use both synchronous and asynchronous validation
* use real-world examples and effective ways of presenting relevant information to the user

Learn to create precise, reusable form components, and enjoy yourself in the process.

Manage React Form State with redux-form

Framer Motion is a production-ready animation and gesture library. With it you can create beautifully smooth animations with minimal effort, or compose together elaborate sequences of animations with low level APIs. 

These videos showcase some of Framer Motion's key features and how to get started implementing them.

Animating React Components with Framer Motion

In React world, things are changing and they are changing rapidly.

If you'd like to get up to speed in what new APIs React has to offer and have literally 7 minutes to spare - this is a collection for you!

Learn React lazy, memo, useState and useEffect in 7 minutes

In this course we are going to work through properly setting up Enzyme with Jest to test rendered components. This includes the nitty gritty of making our testing environment work with various versions of React. After we get our environment setup ready, we’ll work through the different ways we can render a component within our test pages. With a rendered component we can now test component methods and properties to assert that they are what is intended. 

Test React Components with Enzyme and Jest

MobX State Tree (MST) is a library that helps you organize your application states in a very structured manner. It allows you to create a component model, but for your data!

Course instructor Michel Weststrate—creator of Mobx—will teach you to model application state after your problem domain with MST. You will get hands-on practice and see how MST lets you solve problems with its out-of-the-box support for asynchronous actions, patches, snapshots, and middleware.

Over the 17 lessons, you’ll build a little bookshop application using React, MST, and create-react-app, while learning how to manage the lifecycle of your data by describing data models. 

Join Michel in one of the most popular courses on egghead!

Manage Application State with Mobx-state-tree

***Note: Active maintenance for Recompose has been discontinued since the announcement for React hooks. Your existing code using Recompose will still work. Recompose is not compatible with RxJS version 6 and beyond. You can read more about the decision [here.](https://github.com/acdlite/recompose/issues/756#issuecomment-438674573)*** 


Loading data and handling events almost always introduces layers of complexity into React apps. Recompose and RxJS solve your async problems by using Streams to output components. This course walks you through combining the powers of React and RxJS to stream data into JSX with streaming patterns and pure React components.

Build React Components from Streams with RxJS and Recompose

In this course, you will be learn how to get your react app to load as quickly as possible to maximize user engagement—we need faster rendering speed and smaller network requests! 

You’ll learn how to both split code into lazily loaded bundles AND server-side render your page. 

This has not been possible until very recently—you had to choose either code-splitting or SSR. Sure you have Next.js which is awesome, but it’s a framework that you need to buy into. With react-universal-component you are getting a framework-less Next.js that is in your control!

The react-universal-component library does a great job making it as simple as can be, but there are still various specific configurations and practices that must be followed to get it working. So watch the videos to learn how it’s done!

Build a Server Rendered + Code Split App in React with React Universal Component

Once you’ve nailed the fundamentals of React, that’s when things get really fun.

This course teaches you advanced patterns in React that you can use to make components that are simple, flexible, and enjoyable to work with. 

You'll start with a simple `<Toggle />` component that you'll progressively refactor to each of the patterns. Throughout the course, you’ll see the benefits of each pattern and how they can be mixed-and-matched to make your components more useful (and simple for everyone who comes across them).

Kent C. Dodds has built and shipped components using each of these patterns. Along the way, he will help you understand and weigh the trade-offs of each pattern so you’ll intuitively know where to apply each of them in your own components. 

You’ll finish the course with a list of actionable things you can do, right away, to rework the components that you're building. You’ll complete the course more knowledgeable about React components and equipped to make your components more simple.

Note: This course covers **class component patterns** and is still interesting and valuable for the serious React developer, but for most current apps you'll probably want to use [React Hooks](httsp://next.egghead.io/q/q=hooks).

React Class Component Patterns

No matter what type of app you’re building, you're going to need to fetch data, display it to a user, and enable the user to interact with and update that data. This interaction and updating phase is often asynchronous by nature which presents you, the developer, an opportunity to provide a range of different experiences depending on the scenario.

In some instances, you can leverage what is known as optimistic UI updates for an improved, snappier user experience compared to a traditional “loading/waiting” experience. They aren’t suited for every use case, but selectively making use of optimistic UI updates throughout your application can have a significant impact on the quality of user experience for relatively little cost and complexity!

In this course, we’ll walk through implementing optimistic UI updates in the real world example of liking and unliking a tweet. We'll use React's built-in state and make use of extracting setState updater functions to help manage and better define our setState usages. 

Optimistic UI Updates in React

React hooks can be used to add state to functional components, as well as replace the lifecycle methods that only class methods had available until now.

This playlist goes through several different hooks available now in React, as well as how to make your own custom hooks!

React Hooks in Function Components

***Note: RxJS imports have changed since the publication of this course. Operators now must be passed into `.pipe` to be applied to an observable.***

In this course we will begin with nothing more than an empty directory & a text editor. Through small, focussed lessons we’ll learn how to setup a React project that uses Redux for state management and redux-observable for asynchronous actions. We’ll see how ‘epics’ are registered and how they each receive a ‘stream’ of actions from the store. 

With an understanding of how things work, we’ll move onto solving common problems such as Ajax cancellation, creating sequences of async actions, enabling code reuse through higher-order Observables and much more. 

## **UPDATE:** 
This course is outdated, view updated material here: [Asynchronous State Management with redux-observable v1](https://egghead.io/courses/asynchronous-state-management-with-redux-observable-v1)

Up and Running with redux-observable

React 16.8.1 was just released, and hooks are finally stable! If you have literally 12 minutes to spare, you can learn how to use hooks (useState, useEffect and useMemo) as well as brand new React features such as React.lazy and React.memo.

Enjoy!

Learn React hooks, lazy, and memo API

Introduced in React 16.8, Hooks are a new way to write stateful components while avoiding the pitfalls of classes. 

As a result, GraphQL developers everywhere wanted to use them for their Apollo Client components, instead of relying on render props pattern. In August of 2019 things have changed and Apollo Client now has official support for React hooks, by providing `useQuery`, `useLazyQuery`, `useMutation` and `useSubscription` hooks.

If you'd like to learn how to use them, this playlist is for you!

Learn Apollo Client Hooks

Managing state in modern web applications is hard. As applications grows in complexity, keeping track of state changes and mapping those changes back to your UI becomes increasingly difficult.

One way data flow makes managing state more approachable and lightens the cognitive load required to follow the flow of data through your application. Using Redux takes this idea to the next level and moves the state and the state changes and centralizes them in a global store, managed with pure reducer functions.

In this course you will learn how to build a production quality React application using Redux. We will build up from using redux by itself, so we can understand the core API and how that interacts with a React application, then we’ll move on to introduce `react-redux` to abstract away some of the underlying details and clean up our code. We’ll use middleware and a mocked API server to understand how asynchronous code fits into the Redux model and we’ll even deploy our finished work so we can see it running live in the cloud. 

If you are brand new to React, you’ll want to read the documentation and watch our free [React Fundamentals](https://egghead.io/courses/start-using-react-to-build-web-applications) course and our [Build Your First Production Quality React App](https://egghead.io/courses/build-your-first-production-quality-react-app) course. To get up to speed on Redux, you should check out Dan Abramov’s [Getting Started With Redux](https://egghead.io/courses/getting-started-with-redux) course.

Build A React App With Redux

Managing state in a UI is challenging. It's genuinely difficult and the solutions require a depth of knowledge and experience to understand. Everything is a balance of tradeoffs in complexity, performance, and user experience.

This is a series of interviews with experts, open-source maintainers, and UI developers that have combined decades of experience building stateful UI applications for millions of users. 

Part interview, part screen share, these videos should benefit you if you're building web applications.

They focus on React, but the underlying principles are valid for UI work in general (and beyond).

React State Management in 2021

In this course we will explore the possibilities to bring VR to the Web using React VR. Each lesson focuses on one specific concept or component that comes with React VR. This guide covers a large surface area of experiences like teleporting a user to a recorded 360° experience as well as placing them in virtual worlds. Even a combination of both is possible. Each lesson is independent, but some require knowledge explained in a previous lesson.

Build Virtual Reality Experiences Using React VR

Forms are difficult in React.

Luckily, there are many solutions that allow us to create React forms more easily, such as [React Final Form](https://github.com/final-form/react-final-form) created by [Erik Rasmussen](https://twitter.com/erikras).

React Final Form is a high performance subscription-based form state management for React which is not only extremely powerful, but also lightweight (3.0k gzipped!) and easy to use.

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