Swr js It’s called SWR — a custom Hook library that handles caching, revalidation, focus tracking, re-fetching on the interval, and more. com SWR for Client-side Data Fetching in Next. js swr edited Jan 29, 2023 at 16:37 asked Jan 29, 2023 at 14:22 Belfed Sep 8, 2023 · Problem with SWR/next js (0 , swr__WEBPACK_IMPORTED_MODULE_8__. In this article, Sam Poder explains what SWR is, where to use it (and where not), and how to build a website by using Incremental Static Regeneration. The Philosophy behind SWR The core Learn about client-side data fetching, and how to use SWR, a data fetching React Hook library that handles caching, revalidation, focus tracking, refetching on interval and more. Nuxt supports both universal and client-side rendering. Dec 2, 2024 · Building a robust React or Next. How to Fetch Data in Next. js, so you already know it's optimized for modern React applications. waiting OR swr. It ensures efficient data management, leading to cleaner code and a better user experience. Apr 11, 2025 · It’s used by tools like Next. May 25, 2025 · Photo by Kristina N / Unsplash In the ever-evolving world of React and Next. js it shows up in console log, but isn't called on my button click. JS SSG and SSR tab, but I am still confused as how to get the data from an external API: Why does the example from the hyperlink above uses '/api/article' as a key? The beloved swr package ported over to solid. installing = null; // At this point, swr. json()); } useSWR("pokemon Jan 23, 2024 · API Calls on Next. Dec 26, 2022 · SWR considers any cached response older than max-age invalid. If you have an existing SPA, you can migrate to Next. js Static Pages with SWR # react # nextjs # shopify # swr 8 reactions Add Comment Apr 13, 2025 · Learn how to use SWR for fast data fetching in Next. It can fetch anything, owing to the API's fetcher delegating network querying API. js Incremental Static Regeneration with SWR Lightning fast static pages with ISR, instantly updated with SWR ⚡️ 📝 Read the blog post 🖥️ View the demo revalidateOnReconnect: false, }; return useSWR(dataKey, fetcher, revalidationOptions); } SWR cache is exposed since 0. In this tutorial, we will be looking at SWR, a library that makes… SWR is an awesome React Hook library for remote data fetching, maintained by the team at Vercel. SWR primeiro retorna os dados do cache (stale), então envia a requisição de busca (revalidate), e finalmente vem com os dados atualizados novamente. js 背后的团队 vecel 开源的一个 用于数据请求的 React Hooks 库 官方介绍：“SWR” 这个名字来自于 stale-while-revalidate：一种由 HTTP RFC 5861 推广的 HTTP 缓存失效策略。 Sep 7, 2022 · With the language-agnostic release of TanStack Query, we review its features, tooling, and usability against SWR, another React caching tool. With just one hook, you can significantly simplify the data fetching logic in your project. May 19, 2023 · In this article, I’ll introduce you to how SWR works, its key concepts, and how to use it for efficient data fetching in client-side Next. Let's build a small project using SWR and Next. Please file Aug 22, 2024 · Stale while revalidate (SWR) is an established pattern for quick data display while refreshing data Tagged with nextjs, webdev, cdn, cache. SWR ships also with great features such as dependent fetching, focus on revalidation, scroll position recovery, and so on. In this comprehensive guide, we'll walk you through what SWR is, its advantages, and provide you with a step-by-step guide on how to use it effectively in your Next. SWR, which stands for Stale-While-Revalidate, is a powerful library for data fetching, revalidating, and caching in React applications. Feb 14, 2023 · SWR is a lightweight library that allows you to handle data fetching and caching in your Next. js でおなじみの Vercel 社が提供しているデータ取得のためのライブラリです。今や React に無くてはならない React Hooks ベースの API で使うことができます。 ちなみに SWR という名前は以下から来ています。 “SWR” という名前は、 HTTP RFC 5861 (opens in a new tab) で提唱された HTTP キャッシュ Product Build APIs Public API Hub API Hub for Enterprise Rapid API Client VSCode Our first Next. then(res => res. Quick Example SWR is a React Hooks library for data fetching. We would like to show you a description here but the site won’t allow us. Uncaught Error: Update hook called on initial render. js 14, particularly with the use of SWR and dynamic client components, offers a powerful and flexible approach for managing data in real-time. js applications. js 13 using React Suspense, which is newly supported at the time of writing. UseState is your go to for managing state in a component, and when you need global state (such as info on the user auth that you will need in lots of components) then can use React Context which is very easy to do in Next. I thought I could use two hooks: const { userData, SWR is a React Hooks library for data fetching. Does SWR have a pur SWR is a React Hooks library for data fetching. app SWR is a React Hooks library for remote data fetching. js and you can find examples for that everywhere. js. js project with SWR for efficient data fetching, caching, and performance optimization. SWR (Stale-While-Revalidate) is a powerful… Sep 9, 2021 · When paired with ISR and Next. js or an experienced developer looking to optimize your data fetching strategy, SWR is a powerful tool worth considering! Now, let's get started! What is SWR and useSWR? SWR is an acronym for stale-while-revalidate. js 项目实战 在本节中，我们将演示如何在 Next. bind(this) and also looked into hooks the last couple days and tried other things but could use some advice. js to products. May 31, 2023 · javascript reactjs next. Caching A cache stores data for a specified amount of time and serves this data to users who request it within that period of time. A complete guide to efficient data fetching and caching. I am using SWR with Next. js promotes a hybrid approach that allows you to use a combination of server-side rendering, static site generation, and client-side rendering, depending on the needs of each page in your application. Thank you Dec 4, 2024 · Conclusion SWR is a powerful library that simplifies client-side data fetching in Next. com Jul 19, 2024 · Whether you are new to React. However I don't know how to use useSWR after the session is authenticated. vercel. This ends up being a good solution for server state management, e. Mar 8, 2024 · SWR offers a modern solution to the challenges of data fetching in React. js without large changes to your code. js, Parcel, and Deno, as well as companies like Vercel, ByteDance, Tencent, Shopify, Trip. js environment, exploring its core concepts, typical usage scenarios, and best practices. js allows you to fetch data in multiple ways, with pre-rendering, server-side rendering or static-site generation, and incremental static regeneration. If our requests includes [a,b,c,d,e] and we call it with 1 SWR Key, we have to revalidate all [a,b,c,d,e] when we mutate 'a' But in the meanwhile, I think I can depend on this. 0: new mutation APIs and improved optimistic UI capabilities, new DevTools, better support for concurrent rendering, and more. 0 version After all, I do not recommend using SWR for this purpose. The server-side actions are defined as follows: // server-side actions export async function getData1(): "SWR is a React Hooks library for remote data fetching. js called SWRV (V for Vue). SWR — это библиотека React хуков для получения данных. Next Learn how to fetch data and stream content that depends on data. Sep 5, 2024 · When building modern web applications, efficient data fetching and management are crucial. SWR is a React Hooks library for data fetching. Jun 6, 2024 · Next. How to Dynamically updated Next. js 14. This will lead to bugs and errors if not fixed. Jul 7, 2021 · I am working on a Next JS project that uses SWR and was wondering where SWR's cache gets stored, is it on the client or in the server? I am asking because if its on the client and so the cache is different for each user then i can make user-specific requests without worrying that the cache will show a user some other user's data Jun 30, 2023 · Revalidating dynamic pages with SWR cachingNotifications You must be signed in to change notification settings Fork 2. js library with hooks for data fetching on the client-side. js team itself, to handle data fetching in an even more convenient way. See full list on github. SWR stands for "stale-while-revalidating", which means, SWR will attempt to load cached data (stale) first, and then fetch new data (revalidate) in the background. then((res) => res. Examples Below are examples using SWR in vanilla JS and other popular frameworks. SWR and React Query are trying to cache API responses on the browser and allow users to effectively manipulate the cache. SWR stands for Stale-While-Revalidate, a strategy that serves cached data while simultaneously fetching updated data, ensuring your app has fast and up-to-date data without unnecessary network calls. json()) } function fetcher(path) { const url = `https://pokeapi. js is a React framework for building full-stack web applications. Client-side fetching in Next. js application efficiently. But what… Jun 19, 2024 · Learn how to generate a loading component in Next. useSWR) is not a function Asked 2 years, 2 months ago Modified 1 year, 7 months ago Viewed 975 times SWR is an all-new data fetching library made by the team at ZEIT, the same team that created Now and Next. Start integrating SWR into your projects today, and enjoy a smoother, more efficient development experience! Have thoughts The official website for SWR. Is this a valid way to fetch data using SWR with server actions? or is this stupid? I need opinions. React, while being a powerful UI library, doesn’t provide … Sep 3, 2025 · SWR (Stale While Revalidate) is a React hook library by Vercel that simplifies data fetching and caching in Next. This step is called rendering. js projects. Dec 5, 2023 · So, SWR is a library built upon the stale-while-revalidate strategy, and it provides React hooks for data fetching. Mar 17, 2025 · What is SWR? SWR stands for stale-while-revalidate, a strategy that serves stale data from the cache while fetching fresh data in the background. active might be true. js’ API routes, SWR can be used to create a responsive user experience. js to see how it works. Introduction swr. js 项目中使用 SWR 来优化数据请求。 我们将创建一个简单的应用程序，它可以从远程服务器获取文章列表，并使用 SWR 来缓存数据和处理错误。 首先，我们需要安装 SWR 库。 可以使用 npm 或 yarn 来安装 SWR： npm 82K subscribers in the nextjs community. The name “ SWR ” is derived from stale-while-revalidate, a cache invalidation strategy popularized by HTTP RFC 5861. js offers several ways for fetching data since it supports both client and server-side rendering. js components into HTML elements. js swr swrlapi asked May 31, 2023 at 10:31 Valentino Fabris Valenti 173 9 May 26, 2025 · SWR is one of the cleanest and most efficient ways to handle data fetching in React and Next. so without further do, lets start how to use it. May 30, 2024 · Learn from our experience in streamlining Nuxt 3 for SEO and speed, navigating scarce documentation and exploring rendering modes. js app with useSWR. If you have static data - fetch once and store in session/local storage or define your own cache. Overview Delivering flawless user experience and structured data retrieval is of the most important when it comes to web development. js Next. SWR offers many critical features, such as its ability to revalidate data automatically, caching, etc. Its simplicity, performance benefits, and robust features make it a valuable asset in your developer toolkit. Im still new in NextJs 13. The Stale-While-Revalidate concept means that while SWR is revalidating the data, it serves the stale data from the cache. Feb 5, 2023 · SWR is a React Hooks library for data fetching. Thanks. Jan 23, 2023 · I'm trying to use useSWR now to fetch data from the backend. It provides intelligent data caching, pagination, support for the React Suspense component, and a number of other features. The two approaches Nov 4, 2020 · Next. Sep 25, 2021 · The form component doesn't or didn't 'call' {data, mutate etc} = swr, the comments component did. Before moving on to the details, let's look at the two most important concepts of SWR. Oct 8, 2024 · Mutation with SWR In SWR, mutation is the ability to modify or update the cached data and then optionally revalidate it. How SWR works Sep 28, 2023 · SWR approach In the realm of client-side data fetching, caching plays a pivotal role in optimizing performance and reducing unnecessary network requests. SWR сначала возвращает данные из кеша (устаревшие), затем отправляет запрос на выборку (ревалидация) и, наконец, снова получает актуальные данные. This is likely a bug in React. It's a lightweight React. Solution: Use SSG instead of SSR or integrate libraries like swr-ssr to normalize hydration. SWR is a React Hooks library for data fetching. This includes fast route transitions with prefetching, client-side data fetching, using browser APIs, integrating with third-party client libraries, creating static routes, and more. Aug 4, 2023 · NextJS and SWR This article mentions data fetching strategy for Client Side Components in NextJS. Jan 12, 2021 · https://swr. js, so you already know it’s optimized for modern React applications. Jan 1, 2024 · SWR offers a modern solution to the challenges of data fetching in React. This ensures both speed and up-to-date content for a smoother user experience. Dec 17, 2024 · SWR is a compelling choice for modern React and Next. This ensures that your app remains fast and responsive while keeping the data up-to-date. js, SWR (Stale-While-Revalidate), and Axios — a triumphant trio that empowers developers to fetch and manage data with unprecedented ease. In this article I'll show you a simple interaction with a dynamically changing SWR optimizes data fetching by showing cached data instantly while revalidating and fetching fresh data in the background for seamless UI updates. Returns the data from cache Sep 19, 2023 · What is SWR? The problem SWR solves? How to set up SWR in your React app How to use SWR to fetch data in a React component How to use SWR for Pagination, auto revalidation, caching, etc. Sep 19, 2023 · Optimize your Next. Apr 11, 2023 · 2 I'm trying to understand better how SWR works paired up with NextJS. This is useful when performing actions like creating, updating, or deleting resources on the server and ensuring the UI reflects the most up-to-date data immediately on the screen without waiting for the server's response. js using fetch, axios, and SWR. I have tried cartUpdate = cartUpdate. For that I need to be able to use SWR outside of React. This library is meant to be used with Vue’s composition API. A complete guide with examples of useSwr with caching, revalidation, and pagination. I'm going to show you how to fetch and manipulate data from a REST API with Vercel's SWR This comprehensive course will guide you through the easiest and most modern approach to fetching data and managing server state using SWR (stale while revalidate) in React or Next. Oct 9, 2024 · Using SWR and React Query for Efficient Data Fetching in React Data fetching is one of the most crucial aspects of any web application. . Maybe I need another approach here. Nevertheless I tried your code and variations of it but it still only updates on refresh Mar 28, 2024 · But with SWR, fetching and handling client-side data has never been easier. My problem is: when I use more than two useSWR -hooks in one component I get these hook errors: Warning: React has detected a change in the order of Hooks called by ComponentExample. This new library is made specifically for React applications as a custom hook with a straightforward interface. co/api/v2/pokemon/pikachu"); function fetcher(key) { return fetch(key). js project comes with its own set of challenges, especially when fetching data on the client side. The best part? It's built by the team at Vercel, the folks behind Next. Vanilla JS - Code - Demo React JS - Code - Demo Vue JS (Vue 3) - Code - Demo SWR is a React Hooks library for data fetching. js client took a lot of inspiration from SWR, but we choose to build our own fetching library because SWR was lacking a couple of important features that we needed. 2. SWR built to fetch data again. Next. js Tutorial on SWR for Client-side Data Fetching May 2, 2025 · swr. Dec 2, 2020 · To support me please read this tutorial at its original posting location on Medium: Using CRUD operations with React SWR for mutating REST API cache SWR for making fetch requests Vercel has made some great libraries and frameworks in the past so it's no surprise that the SWR library would be any different. co/api/v2/${path}/`; return fetch(url). Dec 9, 2022 · Announcing SWR 2. js is the server-side rendering framework, but mostly SWR works on the client-side merely, so it means API won't fetch data till the page loaded (or Javascript loaded). It uses the stale-while-revalidate strategy, meaning cached data is shown instantly for fast rendering, while fresh data is fetched in the background to update the UI. After your app renders the stale cached data, SWR will revalidate it and return fresh data that you can use to update the page. Prerequisites Before you begin you should be familiar with: Basic understanding of JavaScript concepts such as the fetch method React hooks React components SWR is a React Hooks library for data fetching. “I am fed up of making HTTP request $ yarn add swr import useSWR from "swr"; console. Oct 1, 2021 · A declarative, efficient and flexible JavaScript library for building user interfaces. Requirement: 📫 Business - codevolution. This blog post will delve into how SWR can be used in a Node. SWR first returns the data from cache (stale), then sends the fetch request (revalidate), and finally comes with the up-to-date data again. Recently, however, many developers (including some of my friends) have recommended a switch to TanStack Query (formerly React Query) for its advanced Dec 10, 2020 · I want to keep data fetching/caching decoupled from react/components, and only interface it via React useReducer/Context. Nov 29, 2019 · SWR 是由開發 Next. app/ SWRとはなにか SWRは、クライアント側のデータ取得を、Reactで状態管理しやすいようにしてくれるReact Hooksとそれを内包するライブラリです。 SWRを使わない実装 Next. For years, SWR has been a beloved choice for its simplicity and elegance. Oct 16, 2023 · SWR is a React hook library that has been created by Vercel, the company that also created Next. Nov 6, 2021 · I'd like to implement useSWR in my web app and remove axios from the project, but I don't see how I can use SWR multiple times on the same page. g. Learn their pros, cons, and when to use each for optimal performance. js and it has been great so far without any problems. js With SWR Start using SWR in React by installing it first via a package manager. js There is also an alternate method, created by the Next. If you’re still using useEffect for everything, it’s time to level up. So, that means this tutorial does require some familiarity with the composition API, specifically about the setup function, ref, and computed property. Quick Example Jan 24, 2022 · SWR, a React-friendly API used both stand-alone and by Vercel's Next. (no preloading for this page required, that's why I'm working with SWR) I need to send the access _token from the session in the fetcher method from useSWR. Jan 27, 2025 · I'm trying to fetch data in parallel using SWR in a client-side React component in Next. js fully supports building Single-Page Applications (SPAs). npm install swr\n Aug 7, 2024 · This article was last updated on August 07, 2024, to add sections on Security Considerations and SWR. js, React Query, and SWR (Stale-While-Revalidate) are Feb 8, 2023 · SWR 是 Next. js, developers often face tough choices when it comes to data fetching and caching solutions. Feb 15, 2024 · Press enter or click to view image in full size In the fast-paced world of web development, efficiency and scalability are paramount. Most notably built-in support for authentication, mutations (SWR is focused on fetching data, not updating it) and better SSR functionality. Mar 16, 2025 · What is SWR? SWR stands for stale-while-revalidate, a strategy that serves stale data from the cache while fetching fresh data in the background. For React Query, I haven't used it before but as far as I've heard they say it has more features than SWR, but I don't think that your use will be complex enough so that you won't find resources. I've realized I can re-fetch the swr call using swrs 'mutate', but when I try to pass a callback function from my cart. js platform, is a caching data manager. It May 1, 2024 · The name “SWR” literally means stale-while-revalidate, a HTTP cache invalidation strategy popularised by HTTP RFC 5861 (opens in a new tab). SWR first returns the data from cache (stale), then sends the request (revalidate), and finally comes with the up-to-date data again. business@gmail. js — The nice way! (SWR + Axios) Greetings, developers! In this tutorial, I’ll guide you through a seamless approach to integrating SWR into your Next. The best part? It’s built by the team at Vercel, the folks behind Next. It’s built with React Suspense which lets your components “wait” for something before they can render, including data. When using the fetch method, caching SWR is a React Hooks library for data fetching. This approach ensures that users still have a good experience, that the site is fast and that the data is kept up to date. Aug 22, 2025 · SWR, which stands for **Stale-While-Revalidate**, is a powerful strategy for data fetching and caching that has gained popularity in the JavaScript ecosystem. js, SWR, and Axios, exploring how this combination can revolutionize data fetching in your Next. Learn how to manage your application data in Next. js and Vercel maintains both, and I found SWR simpler to use. This is because the statechange // event gets queued, meanwhile the underlying worker may have gone into the waiting // state and will be immediately activated if possible. Dec 4, 2023 · I have a NextJS project where I'm trying to use SWR to fetch data. Not really an objective view, just my two cents SWR is a React Hooks library for data fetching. Its major goal is to make data fetching easier by offering a standardised and simple API for handling distant data. Contribute to tronikelis/solid-swr development by creating an account on GitHub. workflow like: Sep 3, 2024 · Discover the best ways to fetch data in Next. js, a robust React framework, has become the go-to choice for developers seeking to optimize server-side rendering (SSR) and client-side rendering (CSR Dec 18, 2023 · SWR とは Next. Jan 29, 2023 · javascript reactjs next. With just one hook, you can significantly simplify the data fetching logic in your project SWR relies on client side JavaScript which doesn‘t work well for SSR apps that render content on server itself. The name “SWR” is derived from stale-while-revalidate, a HTTP cache invalidation strategy popularized by RFC 5861. How to build single-page applications with Next. Both the browser and server can interpret JavaScript code to turn Vue. log(useSWR); useSWR("https://pokeapi. Jun 23, 2022 · Introduction If You are Front End Developer, of Ofcourse you Use the Axios Library at Tagged with react, useswr, swr, javascript. jsでは、getServerSidePropsやgetStaticPropsなどのサーバーサイドで実行する関数を用意しており、データの取得を Nov 2, 2024 · Next. Nov 7, 2019 · SWR is more intended to get data, not update it, usually you have another function to update and after it you will run mutate to update the cache and trigger a revalidation (SWR will fetch it again) Sep 18, 2024 · Learn how to implement real-time data fetching in Next. 7k Nuxt supports different rendering modes, universal rendering, client-side rendering but also offers hybrid-rendering and the possibility to render your application on CDN Edge Servers. Apr 28, 2024 · Discover how to boost your Next. This command uses npm. js using SWR for efficient and seamless data management in your applications. Apr 30, 2023 · Simplify data fetching in React with SWR and TypeScript to improve performance and the developer experience. It features: Transport and protocol agnostic data Jun 22, 2020 · SWR is a lightweight library created by Vercel (formerly ZEIT) that allows fetching, caching, or refetching data in realtime using React Hooks. js application while … Oct 8, 2023 · Enter Next. I have over studied the example shown in the SWR - Next. In this article, we embark on a journey into the realm of Next. Its features, including caching, optimistic updates, and revalidation, make it a must-have for developers looking to build high-performance, user-friendly applications. With just one hook, you can significantly simplify the data fetching logic in your project SWR is a React Hooks library for data fetching. Learn setup, fetching, and advanced tips. Contribute to vercel/swr-site development by creating an account on GitHub. One is by using SWR, which is a set of React hooks for remote data fetching. For Server Side components refer to my previous article . Nov 20, 2020 · In this tutorial, we’ll check out an SWR implementation for Vue. js SWR is a powerful React Hooks library for data fetching, providing an efficient way to fetch and manage client-side data in your Next. Mar 16, 2024 · Using SWR for state management in Next. js 的團隊成員在 2019/10/29 開源的專案，在 1 個月左右的時間就拿到 5000 顆星星，是一個眾所矚目的開源專案。 Mar 6, 2022 · Next. Jul 22, 2023 · I know that data-fetching on the server using server components is one of the major features with the App Router, but I wanted to gain some insight and clarity on client-side data fetching, specifi In summary, SWR is for managing remote state (from an api). com, and more. I've used more SWR than React Query just because I use Next. Nov 23, 2020 · If we end up making multiple requests in 1 SWR call with 1 SWR Key, each individual request won't be cached separately. SWR é uma biblioteca React Hooks para data fetching. uesidh zcruos lidauz ldse uoduz eshx leaib pbwegy aswy qoundtp iyscli krtq paxrr kjgfi cgsv