Top Content

English versionEN

Rethinking Server State with React Query

Tanner Linsley

Nozzle.io

Recording and certification are available to Multipass and Full ticket holders only

Please login if you have one.

Get Multipass

Bookmark

The distinction between server state and client state in our applications might be a new concept for some, but it is very important to understand when delivering a top-notch user experience. Server state comes with unique problems that often sneak into our applications surprise like:

- Sharing Data across apps

- Caching & Persistence

- Deduping Requests

- Background Updates

- Managing “Stale” Data

- Pagination & Incremental fetching

- Memory & Garbage Collection

- Optimistic Updates

Traditional “Global State” managers pretend these challenges don’t exist and this ultimately results in developers building their own on-the-fly attempts to mitigate them.

In this workshop, we will build an application that exposes these issues, allows us to understand them better, and finally turn them from challenges into features using a library designed for managing server-state called React Query.

By the end of the workshop, you will have a better understanding of server state, client state, syncing asynchronous data (mouthful, I know), and React Query.

This workshop has been presented at React Summit 2020, check out the latest edition of this React Conference.

FAQ

React Query is a library for fetching data in React applications, focusing on managing server state. It addresses challenges like caching, synchronization, and updating server state, differing from tools designed for client state management.

As of its first anniversary, React Query has gained significant traction with 13,000 stars on GitHub, nearly two million downloads on NPM, and contributions from 188 developers.

Key features of React Query include efficient data fetching, caching, automatic background updates, and integration with server states without the need for global state management tools like Redux.

React Query solves problems related to managing asynchronous server state in React applications, such as caching strategies, handling pagination and infinite scrolling, and data synchronization.

Yes, React Query can be used with any asynchronous data fetching method, including REST and GraphQL. It is agnostic of the backend technology.

Client state involves data managed within the browser, often related to UI states like toggled elements or form inputs. Server state is data managed on the server, such as database entries, which the client might need to request and synchronize.

React Post enhances user experience by reducing loading times through efficient data caching and background updating, leading to smoother interactions and less waiting for data fetching.

Yes, there is an official React Query Essentials course available which covers in-depth concepts and practical usage of React Query to manage server state in React applications.

Tanner Linsley

96 min

15 Jul, 2021

Comments

Video Summary and Transcription

React Query is a powerful library for managing server state in React applications. It addresses challenges like caching and synchronization, making it ideal for complex data-fetching scenarios. The workshop covers key features like caching strategies and the use of custom hooks such as usePosts and usePost for efficient data fetching. React Query's useMutation hook simplifies handling mutations, offering functionalities like optimistic updates to enhance performance. The talk also delves into the use of prefetching to reduce loading times and improve user experience. React Query Devtools provide a way to see and manage queries, ensuring data synchronization and efficient debugging. The library supports various data-fetching methods, including GraphQL, making it versatile for different backend technologies. The admin section of the app demonstrates how React Query can handle global state management without needing tools like Redux. The useIsFetching hook is highlighted for checking background data fetching, and the use of query keys and constants for managing large applications is discussed. The video emphasizes the benefits of using React Query for real-time data synchronization and how it can significantly improve user experience by reducing loading screens and providing instant access to cached data.

Available in Español: Repensando el Estado del Servidor con React Query

Video transcription and chapters available for users with access.

Available in other languages:

Watch more workshops on topic

React Performance Debugging Masterclass

React Summit 2023

170 min

React Performance Debugging Masterclass

Top Content

Featured WorkshopFree

Ivan Akulov

Ivan’s first attempts at performance debugging were chaotic. He would see a slow interaction, try a random optimization, see that it didn't help, and keep trying other optimizations until he found the right one (or gave up).
Back then, Ivan didn’t know how to use performance devtools well. He would do a recording in Chrome DevTools or React Profiler, poke around it, try clicking random things, and then close it in frustration a few minutes later. Now, Ivan knows exactly where and what to look for. And in this workshop, Ivan will teach you that too.
Here’s how this is going to work. We’ll take a slow app → debug it (using tools like Chrome DevTools, React Profiler, and why-did-you-render) → pinpoint the bottleneck → and then repeat, several times more. We won’t talk about the solutions (in 90% of the cases, it’s just the ol’ regular useMemo() or memo()). But we’ll talk about everything that comes before – and learn how to analyze any React performance problem, step by step.
(Note: This workshop is best suited for engineers who are already familiar with how useMemo() and memo() work – but want to get better at using the performance tools around React. Also, we’ll be covering interaction performance, not load speed, so you won’t hear a word about Lighthouse 🤐)

react performance best practices advanced debug react debugger react performance react profiler

Concurrent Rendering Adventures in React 18

React Advanced 2021

132 min

Concurrent Rendering Adventures in React 18

Top Content

Featured WorkshopFree

Maurice de Beijer

With the release of React 18 we finally get the long awaited concurrent rendering. But how is that going to affect your application? What are the benefits of concurrent rendering in React? What do you need to do to switch to concurrent rendering when you upgrade to React 18? And what if you don’t want or can’t use concurrent rendering yet?

There are some behavior changes you need to be aware of! In this workshop we will cover all of those subjects and more.

Join me with your laptop in this interactive workshop. You will see how easy it is to switch to concurrent rendering in your React application. You will learn all about concurrent rendering, SuspenseList, the startTransition API and more.

react concurrent rendering react 18 react concurrent mode react suspense

React Hooks Tips Only the Pros Know

React Summit Remote Edition 2021

177 min

React Hooks Tips Only the Pros Know

Top Content

Featured Workshop

Maurice de Beijer

The addition of the hooks API to React was quite a major change. Before hooks most components had to be class based. Now, with hooks, these are often much simpler functional components. Hooks can be really simple to use. Almost deceptively simple. Because there are still plenty of ways you can mess up with hooks. And it often turns out there are many ways where you can improve your components a better understanding of how each React hook can be used.You will learn all about the pros and cons of the various hooks. You will learn when to use useState() versus useReducer(). We will look at using useContext() efficiently. You will see when to use useLayoutEffect() and when useEffect() is better.

react best practices react hooks deep dive react 18 hooks react profiler

React, TypeScript, and TDD

React Advanced 2021

174 min

React, TypeScript, and TDD

Top Content

Featured WorkshopFree

Paul Everitt

ReactJS is wildly popular and thus wildly supported. TypeScript is increasingly popular, and thus increasingly supported.

The two together? Not as much. Given that they both change quickly, it's hard to find accurate learning materials.

React+TypeScript, with JetBrains IDEs? That three-part combination is the topic of this series. We'll show a little about a lot. Meaning, the key steps to getting productive, in the IDE, for React projects using TypeScript. Along the way we'll show test-driven development and emphasize tips-and-tricks in the IDE.

react best practices typescript devtools web development test driven development react

Web3 Workshop - Building Your First Dapp

React Advanced 2021

145 min

Web3 Workshop - Building Your First Dapp

Top Content

Featured WorkshopFree

Nader Dabit

In this workshop, you'll learn how to build your first full stack dapp on the Ethereum blockchain, reading and writing data to the network, and connecting a front end application to the contract you've deployed. By the end of the workshop, you'll understand how to set up a full stack development environment, run a local node, and interact with any smart contract using React, HardHat, and Ethers.js.

react blockchain web development ethereum web3

Designing Effective Tests With React Testing Library

React Summit 2023

151 min

Designing Effective Tests With React Testing Library

Top Content

Featured Workshop

Josh Justice

React Testing Library is a great framework for React component tests because there are a lot of questions it answers for you, so you don’t need to worry about those questions. But that doesn’t mean testing is easy. There are still a lot of questions you have to figure out for yourself: How many component tests should you write vs end-to-end tests or lower-level unit tests? How can you test a certain line of code that is tricky to test? And what in the world are you supposed to do about that persistent act() warning?
In this three-hour workshop we’ll introduce React Testing Library along with a mental model for how to think about designing your component tests. This mental model will help you see how to test each bit of logic, whether or not to mock dependencies, and will help improve the design of your components. You’ll walk away with the tools, techniques, and principles you need to implement low-cost, high-value component tests.
Table of contents- The different kinds of React application tests, and where component tests fit in- A mental model for thinking about the inputs and outputs of the components you test- Options for selecting DOM elements to verify and interact with them- The value of mocks and why they shouldn’t be avoided- The challenges with asynchrony in RTL tests and how to handle them
Prerequisites- Familiarity with building applications with React- Basic experience writing automated tests with Jest or another unit testing framework- You do not need any experience with React Testing Library- Machine setup: Node LTS, Yarn

react testing best practices deep dive react testing react testing library test driven development react

Check out more articles and videos

We constantly think of articles and videos that might spark Git people interest / skill us up or help building a stellar career

A Guide to React Rendering Behavior

React Advanced 2022

25 min

A Guide to React Rendering Behavior

Top Content

Mark Erikson

Replay.io

This transcription provides a brief guide to React rendering behavior. It explains the process of rendering, comparing new and old elements, and the importance of pure rendering without side effects. It also covers topics such as batching and double rendering, optimizing rendering and using context and Redux in React. Overall, it offers valuable insights for developers looking to understand and optimize React rendering.

react performance deep dive react rendering

Building Better Websites with Remix

React Summit Remote Edition 2021

33 min

Building Better Websites with Remix

Top Content

Michael Jackson

React Training

Remix is a web framework built on React Router that focuses on web fundamentals, accessibility, performance, and flexibility. It delivers real HTML and SEO benefits, and allows for automatic updating of meta tags and styles. It provides features like login functionality, session management, and error handling. Remix is a server-rendered framework that can enhance sites with JavaScript but doesn't require it for basic functionality. It aims to create quality HTML-driven documents and is flexible for use with different web technologies and stacks.

react remix frameworks

Everything Beyond State Management in Stores with Pinia

Vue.js London Live 2021

34 min

Everything Beyond State Management in Stores with Pinia

Top Content

Eduardo San Martin Morote

Vue.js Core Team

State management is not limited to complex applications and transitioning to a store offers significant benefits. Pinia is a centralized state management solution compatible with Vue 2 and Vue 3, providing advanced devtools support and extensibility with plugins. The core API of Pinia is similar to Vuex, but with a less verbose version of stores and powerful plugins. Pinia allows for easy state inspection, error handling, and testing. It is recommended to create one file per store for better organization and Pinia offers a more efficient performance compared to V-rex.

state management vue pinia react

React Compiler - Understanding Idiomatic React (React Forget)

React Advanced 2023

33 min

React Compiler - Understanding Idiomatic React (React Forget)

Top Content

Watch video: React Compiler - Understanding Idiomatic React (React Forget)

2 authors

The Talk discusses React Forget, a compiler built at Meta that aims to optimize client-side React development. It explores the use of memoization to improve performance and the vision of Forget to automatically determine dependencies at build time. Forget is named with an F-word pun and has the potential to optimize server builds and enable dead code elimination. The team plans to make Forget open-source and is focused on ensuring its quality before release.

react build tools builders and founders react 19 react forget

Using useEffect Effectively

React Advanced 2022

30 min

Using useEffect Effectively

Top Content

David Khourshid

Stately

Today's Talk explores the use of the useEffect hook in React development, covering topics such as fetching data, handling race conditions and cleanup, and optimizing performance. It also discusses the correct use of useEffect in React 18, the distinction between Activity Effects and Action Effects, and the potential misuse of useEffect. The Talk highlights the benefits of using useQuery or SWR for data fetching, the problems with using useEffect for initializing global singletons, and the use of state machines for handling effects. The speaker also recommends exploring the beta React docs and using tools like the stately.ai editor for visualizing state machines.

react best practices state management react hook missing dependency

Routing in React 18 and Beyond

React Summit 2022

20 min

Routing in React 18 and Beyond

Top Content

Delba de Oliveira

Senior Developer Advocate @ Vercel

Routing in React 18 brings a native app-like user experience and allows applications to transition between different environments. React Router and Next.js have different approaches to routing, with React Router using component-based routing and Next.js using file system-based routing. React server components provide the primitives to address the disadvantages of multipage applications while maintaining the same user experience. Improving navigation and routing in React involves including loading UI, pre-rendering parts of the screen, and using server components for more performant experiences. Next.js and Remix are moving towards a converging solution by combining component-based routing with file system routing.

react next.js patterns react file based routing