diff --git a/.github/workflows/discord_notify.yml b/.github/workflows/discord_notify.yml index ff2caa1bf..9d83081cc 100644 --- a/.github/workflows/discord_notify.yml +++ b/.github/workflows/discord_notify.yml @@ -2,11 +2,18 @@ name: Discord Notify on: pull_request_target: - types: [ labeled ] + types: [labeled] jobs: + check_maintainer: + uses: facebook/react/.github/workflows/shared_check_maintainer.yml@main + with: + actor: ${{ github.event.pull_request.user.login }} + is_remote: true + notify: - if: ${{ github.event.label.name == 'React Core Team' }} + if: ${{ needs.check_maintainer.outputs.is_core_team == 'true' }} + needs: check_maintainer runs-on: ubuntu-latest steps: - name: Discord Webhook Action @@ -18,4 +25,4 @@ jobs: embed-author-icon-url: ${{ github.event.pull_request.user.avatar_url }} embed-title: '#${{ github.event.number }} (+${{github.event.pull_request.additions}} -${{github.event.pull_request.deletions}}): ${{ github.event.pull_request.title }}' embed-description: ${{ github.event.pull_request.body }} - embed-url: ${{ github.event.pull_request.html_url }} \ No newline at end of file + embed-url: ${{ github.event.pull_request.html_url }} diff --git a/.github/workflows/label_core_team_prs.yml b/.github/workflows/label_core_team_prs.yml new file mode 100644 index 000000000..3d9fa2be1 --- /dev/null +++ b/.github/workflows/label_core_team_prs.yml @@ -0,0 +1,32 @@ +name: Label Core Team PRs + +on: + pull_request_target: + +env: + TZ: /usr/share/zoneinfo/America/Los_Angeles + # https://github.com/actions/cache/blob/main/tips-and-workarounds.md#cache-segment-restore-timeout + SEGMENT_DOWNLOAD_TIMEOUT_MINS: 1 + +jobs: + check_maintainer: + uses: facebook/react/.github/workflows/shared_check_maintainer.yml@main + with: + actor: ${{ github.event.pull_request.user.login }} + is_remote: true + + label: + if: ${{ needs.check_maintainer.outputs.is_core_team == 'true' }} + runs-on: ubuntu-latest + needs: check_maintainer + steps: + - name: Label PR as React Core Team + uses: actions/github-script@v7 + with: + script: | + github.rest.issues.addLabels({ + owner: context.repo.owner, + repo: context.repo.repo, + issue_number: ${{ github.event.number }}, + labels: ['React Core Team'] + }); diff --git a/next-env.d.ts b/next-env.d.ts index 52e831b43..3cd7048ed 100644 --- a/next-env.d.ts +++ b/next-env.d.ts @@ -1,5 +1,6 @@ /// /// +/// // NOTE: This file should not be edited -// see https://nextjs.org/docs/pages/api-reference/config/typescript for more information. +// see https://nextjs.org/docs/app/api-reference/config/typescript for more information. diff --git a/package.json b/package.json index 07e6136e6..6d6b53f92 100644 --- a/package.json +++ b/package.json @@ -24,8 +24,8 @@ }, "dependencies": { "@codesandbox/sandpack-react": "2.13.5", - "@docsearch/css": "^3.6.1", - "@docsearch/react": "^3.6.1", + "@docsearch/css": "^3.8.3", + "@docsearch/react": "^3.8.3", "@headlessui/react": "^1.7.0", "@radix-ui/react-context-menu": "^2.1.5", "body-scroll-lock": "^3.1.3", diff --git a/public/images/team/andrey-lunyov.jpg b/public/images/team/andrey-lunyov.jpg deleted file mode 100644 index aeaaec06a..000000000 Binary files a/public/images/team/andrey-lunyov.jpg and /dev/null differ diff --git a/public/images/team/hendrik.jpg b/public/images/team/hendrik.jpg new file mode 100644 index 000000000..b39ea5be2 Binary files /dev/null and b/public/images/team/hendrik.jpg differ diff --git a/public/images/team/jordan.jpg b/public/images/team/jordan.jpg new file mode 100644 index 000000000..d8874a29f Binary files /dev/null and b/public/images/team/jordan.jpg differ diff --git a/public/images/team/kathryn-middleton.jpg b/public/images/team/kathryn-middleton.jpg deleted file mode 100644 index 904c3b134..000000000 Binary files a/public/images/team/kathryn-middleton.jpg and /dev/null differ diff --git a/public/images/team/lauren.jpg b/public/images/team/lauren.jpg index 26d46bd2f..a8615aa00 100644 Binary files a/public/images/team/lauren.jpg and b/public/images/team/lauren.jpg differ diff --git a/public/images/team/luna-wei.jpg b/public/images/team/luna-wei.jpg deleted file mode 100644 index cdc4a2b6a..000000000 Binary files a/public/images/team/luna-wei.jpg and /dev/null differ diff --git a/public/images/team/mike.jpg b/public/images/team/mike.jpg new file mode 100644 index 000000000..39fe23fea Binary files /dev/null and b/public/images/team/mike.jpg differ diff --git a/public/images/team/noahlemen.jpg b/public/images/team/noahlemen.jpg deleted file mode 100644 index e3f788d89..000000000 Binary files a/public/images/team/noahlemen.jpg and /dev/null differ diff --git a/public/images/team/pieter.jpg b/public/images/team/pieter.jpg new file mode 100644 index 000000000..d098e5abe Binary files /dev/null and b/public/images/team/pieter.jpg differ diff --git a/public/images/team/sam.jpg b/public/images/team/sam.jpg deleted file mode 100644 index f73474b91..000000000 Binary files a/public/images/team/sam.jpg and /dev/null differ diff --git a/public/images/team/sathya.jpg b/public/images/team/sathya.jpg deleted file mode 100644 index 0f087f4a3..000000000 Binary files a/public/images/team/sathya.jpg and /dev/null differ diff --git a/public/images/team/tianyu.jpg b/public/images/team/tianyu.jpg deleted file mode 100644 index aeb6ed9fa..000000000 Binary files a/public/images/team/tianyu.jpg and /dev/null differ diff --git a/src/components/MDX/CodeBlock/CodeBlock.tsx b/src/components/MDX/CodeBlock/CodeBlock.tsx index 1fd9a8a90..42165c57d 100644 --- a/src/components/MDX/CodeBlock/CodeBlock.tsx +++ b/src/components/MDX/CodeBlock/CodeBlock.tsx @@ -336,6 +336,7 @@ function getInlineDecorators( line.step === 3, 'bg-green-40 border-green-40 text-green-60 dark:text-green-30': line.step === 4, + // TODO: Some codeblocks use up to 6 steps. } ), }) diff --git a/src/components/MDX/TeamMember.tsx b/src/components/MDX/TeamMember.tsx index a49aa728e..2c2fffa73 100644 --- a/src/components/MDX/TeamMember.tsx +++ b/src/components/MDX/TeamMember.tsx @@ -3,7 +3,7 @@ */ import * as React from 'react'; -import Image from 'next/image'; +import Image from 'next/legacy/image'; import {IconTwitter} from '../Icon/IconTwitter'; import {IconThreads} from '../Icon/IconThreads'; import {IconBsky} from '../Icon/IconBsky'; diff --git a/src/content/blog/2024/12/05/react-19.md b/src/content/blog/2024/12/05/react-19.md index 62a6ce464..aac80a44f 100644 --- a/src/content/blog/2024/12/05/react-19.md +++ b/src/content/blog/2024/12/05/react-19.md @@ -294,7 +294,7 @@ A component was suspended by an uncached promise. Creating promises inside a Cli -To fix, you need to pass a promise from a suspense powered library or framework that supports caching for promises. In the future we plan to ship features to make it easier to cache promises in render. +To fix, you need to pass a promise from a Suspense powered library or framework that supports caching for promises. In the future we plan to ship features to make it easier to cache promises in render. diff --git a/src/content/blog/2025/02/14/sunsetting-create-react-app.md b/src/content/blog/2025/02/14/sunsetting-create-react-app.md new file mode 100644 index 000000000..531d9c9f6 --- /dev/null +++ b/src/content/blog/2025/02/14/sunsetting-create-react-app.md @@ -0,0 +1,309 @@ +--- +title: "Sunsetting Create React App" +author: Matt Carroll and Ricky Hanlon +date: 2025/02/14 +description: Today, we’re deprecating Create React App for new apps, and encouraging existing apps to migrate to a framework. We’re also providing docs for when a framework isn’t a good fit for your project, or you prefer to start by building a framework. +--- + +February 14, 2025 by [Matt Carroll](https://twitter.com/mattcarrollcode) and [Ricky Hanlon](https://bsky.app/profile/ricky.fm) + +--- + + + +Today, we’re deprecating [Create React App](https://create-react-app.dev/) for new apps, and encouraging existing apps to migrate to a [framework](/learn/creating-a-react-app). We’re also providing docs for when a framework isn’t a good fit for your project, or you prefer to start by [building a framework](/learn/building-a-react-framework). + + + +----- + +When we released Create React App in 2016, there was no clear way to build a new React app. + +To create a React app, you had to install a bunch of tools and wire them up together yourself to support basic features like JSX, linting, and hot reloading. This was very tricky to do correctly, so the [community](https://github.com/react-boilerplate/react-boilerplate) [created](https://github.com/kriasoft/react-starter-kit) [boilerplates](https://github.com/petehunt/react-boilerplate) for [common](https://github.com/gaearon/react-hot-boilerplate) [setups](https://github.com/erikras/react-redux-universal-hot-example). However, boilerplates were difficult to update and fragmentation made it difficult for React to release new features. + +Create React App solved these problems by combining several tools into a single recommended configuration. This allowed apps a simple way to upgrade to new tooling features, and allowed the React team to deploy non-trivial tooling changes (Fast Refresh support, React Hooks lint rules) to the broadest possible audience. + +This model became so popular that there's an entire category of tools working this way today. + +## Deprecating Create React App {/*deprecating-create-react-app*/} + +Although Create React App makes it easy to get started, [there are several limitations](#limitations-of-create-react-app) that make it difficult to build high performant production apps. In principle, we could solve these problems by essentially evolving it into a [framework](#why-we-recommend-frameworks). + +However, since Create React App currently has no active maintainers, and there are many existing frameworks that solve these problems already, we’ve decided to deprecate Create React App. + +Starting today, if you install a new app, you will see a deprecation warning: + + + + +create-react-app is deprecated. +{'\n\n'} +You can find a list of up-to-date React frameworks on react.dev +For more info see: react.dev/link/cra +{'\n\n'} +This error message will only be shown once per install. + + + + +We recommend [creating new React apps](/learn/creating-a-react-app) with a framework. All the frameworks we recommend support client-only SPAs, and can be deployed to a CDN or static hosting service without a server. + +For existing apps, these guides will help you migrate to a client-only SPA: + +* [Next.js’ Create React App migration guide](https://nextjs.org/docs/app/building-your-application/upgrading/from-create-react-app) +* [React Router’s framework adoption guide](https://reactrouter.com/upgrading/component-routes). +* [Expo Webpack to Expo Router migration guide](https://docs.expo.dev/router/migrate/from-expo-webpack/) + +Create React App will continue working in maintenance mode, and we've published a new version of Create React App to work with React 19. + +If your app has unusual constraints, or you prefer to solve these problems by building your own framework, or you just want to learn how react works from scratch, you can roll your own custom setup with React using Vite, Parcel or Rsbuild. + +To help users get started with Vite, Parcel or Rsbuild, we've published new docs for [Building a Framework](/learn/building-a-react-framework). Continue reading to learn more about the [limitations of Create React App](#limitations-of-create-react-app) and [why we recommend frameworks](#why-we-recommend-frameworks). + + + +#### Do you recommend Vite? {/*do-you-recommend-vite*/} + +We provide several Vite-based recommendations. + +React Router v7 is a Vite based framework which allows you to use Vite's fast development server and build tooling with a framework that provides routing and data fetching. Just like the other frameworks we recommend, you can build a SPA with React Router v7. + +We also recommend using Vite when [adding React to an existing project](/learn/add-react-to-an-existing-project), or [building a framework](/learn/building-a-react-framework). + +Just like Svelte has Sveltekit, Vue has Nuxt, and Solid has SolidStart, React recommends using a framework that integrates with build tools like Vite for new projects. + + + +## Limitations of Create React App {/*limitations-of-create-react-app*/} + +Create React App and build tools like it make it easy to get started building a React app. After running `npx create-react-app my-app`, you get a fully configured React app with a development server, linting, and a production build. + +For example, if you're building an internal admin tool, you can start with a landing page: + +```js +export default function App() { + return ( +
+

Welcome to the Admin Tool!

+
+ ) +} +``` + +This allows you to immediately start coding in React with features like JSX, default linting rules, and a bundler to run in both development and production. However, this setup is missing the tools you need to build a real production app. + +Most production apps need solutions to problems like routing, data fetching, and code splitting. + +### Routing {/*routing*/} + +Create React App does not include a specific routing solution. If you're just getting started, one option is to use `useState` to switch between routes. But doing this means that you can't share links to your app - every link would go to the same page - and structuring your app becomes difficult over time: + +```js +import {useState} from 'react'; + +import Home from './Home'; +import Dashboard from './Dashboard'; + +export default function App() { + // ❌ Routing in state does not create URLs + const [route, setRoute] = useState('home'); + return ( +
+ {route === 'home' && } + {route === 'dashboard' && } +
+ ) +} +``` + +This is why most apps that use Create React App solve add routing with a routing library like [React Router](https://reactrouter.com/) or [Tanstack Router](https://tanstack.com/router/latest). With a routing library, you can add additional routes to the app, which provides opinions on the structure of your app, and allows you to start sharing links to routes. For example, with React Router you can define routes: + +```js +import {RouterProvider, createBrowserRouter} from 'react-router'; + +import Home from './Home'; +import Dashboard from './Dashboard'; + +// ✅ Each route has it's own URL +const router = createBrowserRouter([ + {path: '/', element: }, + {path: '/dashboard', element: } +]); + +export default function App() { + return ( + + ) +} +``` + +With this change, you can share a link to `/dashboard` and the app will navigate to the dashboard page . Once you have a routing library, you can add additional features like nested routes, route guards, and route transitions, which are difficult to implement without a routing library. + +There's a tradeoff being made here: the routing library adds complexity to the app, but it also adds features that are difficult to implement without it. + +### Data Fetching {/*data-fetching*/} + +Another common problem in Create React App is data fetching. Create React App does not include a specific data fetching solution. If you're just getting started, a common option is to use `fetch` in an effect to load data. + +But doing this means that the data is fetched after the component renders, which can cause network waterfalls. Network waterfalls are caused by fetching data when your app renders instead of in parallel while the code is downloading: + +```js +export default function Dashboard() { + const [data, setData] = useState(null); + + // ❌ Fetching data in a component causes network waterfalls + useEffect(() => { + fetch('/api/data') + .then(response => response.json()) + .then(data => setData(data)); + }, []); + + return ( +
+ {data.map(item =>
{item.name}
)} +
+ ) +} +``` + +Fetching in an effect means the user has to wait longer to see the content, even though the data could have been fetched earlier. To solve this, you can use a data fetching library like [React Query](https://react-query.tanstack.com/), [SWR](https://swr.vercel.app/), [Apollo](https://www.apollographql.com/docs/react), or [Relay](https://relay.dev/) which provide options to prefetch data so the request is started before the component renders. + +These libraries work best when integrated with your routing "loader" pattern to specify data dependencies at the route level, which allows the router to optimize your data fetches: + +```js +export async function loader() { + const response = await fetch(`/api/data`); + const data = await response.json(); + return data; +} + +// ✅ Fetching data in parallel while the code is downloading +export default function Dashboard({loaderData}) { + return ( +
+ {loaderData.map(item =>
{item.name}
)} +
+ ) +} +``` + +On initial load, the router can fetch the data immediately before the route is rendered. As the user navigates around the app, the router is able to fetch both the data and the route at the same time, parallelizing the fetches. This reduces the time it takes to see the content on the screen, and can improve the user experience. + +However, this requires correctly configuring the loaders in your app and trades off complexity for performance. + +### Code Splitting {/*code-splitting*/} + +Another common problem in Create React App is [code splitting](https://www.patterns.dev/vanilla/bundle-splitting). Create React App does not include a specific code splitting solution. If you're just getting started, you might not consider code splitting at all. + +This means your app is shipped as a single bundle: + +```txt +- bundle.js 75kb +``` + +But for ideal performance, you should "split" your code into separate bundles so the user only needs to download what they need. This decreases the time the user needs to wait to load your app, by only downloading the code they need to see the page they are on. + +```txt +- core.js 25kb +- home.js 25kb +- dashboard.js 25kb +``` + +One way to do code-splitting is with `React.lazy`. However, this means that the code is not fetched until the component renders, which can cause network waterfalls. A more optimal solution is to use a router feature that fetches the code in parallel while the code is downloading. For example, React Router provides a `lazy` option to specify that a route should be code split and optimize when it is loaded: + +```js +import Home from './Home'; +import Dashboard from './Dashboard'; + +// ✅ Routes are downloaded before rendering +const router = createBrowserRouter([ + {path: '/', lazy: () => import('./Home')}, + {path: '/dashboard', lazy: () => import('Dashboard')} +]); +``` + +Optimized code-splitting is tricky to get right, and it's easy to make mistakes that can cause the user to download more code than they need. It works best when integrated with your router and data loading solutions to maximize caching, parallelize fetches, and support ["import on interaction"](https://www.patterns.dev/vanilla/import-on-interaction) patterns. + +### And more... {/*and-more*/} + +These are just a few examples of the limitations of Create React App. + +Once you've integrated routing, data-fetching, and code splitting, you now also need to consider pending states, navigation interruptions, error messages to the user, and revalidation of the data. There are entire categories of problems that users need to solve like: + +
+
    +
  • Accessibility
    • +
  • Asset loading
    • +
  • Authentication
    • +
  • Caching
    • +
+
    +
  • Error handling
    • +
  • Mutating data
    • +
  • Navigations
    • +
  • Optimistic updates
    • +
+
    +
  • Progressive enhancement
    • +
  • Server-side rendering
    • +
  • Static site generation
    • +
  • Streaming
    • +
+
+ +All of these work together to create the most optimal [loading sequence](https://www.patterns.dev/vanilla/loading-sequence). + +Solving each of these problems individually in Create React App can be difficult as each problem is interconnected with the others and can require deep expertise in problem areas users may not be familiar with. In order to solve these problems, users end up building their own bespoke solutions on top of Create React App, which was the problem Create React App originally tried to solve. + +## Why we Recommend Frameworks {/*why-we-recommend-frameworks*/} + +Although you could solve all these pieces yourself in a build tool like Create React App, Vite, or Parcel, it is hard to do well. Just like when Create React App itself integrated several build tools together, you need a tool to integrate all of these features together to provide the best experience to users. + +This category of tools that integrates build tools, rendering, routing, data fetching, and code splitting are known as "frameworks" -- or if you prefer to call React itself a framework, you might call them "metaframeworks". + +Frameworks impose some opinions about structuring your app in order to provide a much better user experience, in the same way build tools impose some opinions to make tooling easier. This is why we started recommending frameworks like [Next.js](https://nextjs.org/), [React Router](https://reactrouter.com/), and [Expo](https://expo.dev/) for new projects. + +Frameworks provide the same getting started experience as Create React App, but also provide solutions to problems users need to solve anyway in real production apps. + + + +#### Server rendering is optional {/*server-rendering-is-optional*/} + +The frameworks we recommend all provide the option to create a [client-side rendered (CSR)](https://developer.mozilla.org/en-US/docs/Glossary/CSR) app. + +In some cases, CSR is the right choice for a page, but many times it's not. Even if most of your app is client-side, there are often individual pages that could benefit from server rendering features like [static-site generation (SSG)](https://developer.mozilla.org/en-US/docs/Glossary/SSG) or [server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR), for example a Terms of Service page, or documentation. + +Server rendering generally sends less JavaScript to the client, and a full HTML document which produces a faster [First Contentful Paint (FCP)](https://web.dev/articles/fcp) by reducing [Total Blocking Time (TBD)](https://web.dev/articles/tbt), which can also lower [Interaction to Next Paint (INP)](https://web.dev/articles/inp). This is why the [Chrome team has encouraged](https://web.dev/articles/rendering-on-the-web) developers to consider static or server-side render over a full client-side approach to achieve the best possible performance. + +There are tradeoffs to using a server, and it is not always the best option for every page. Generating pages on the server incurs additional cost and takes time to generate which can increase [Time to First Byte (TTFB)](https://web.dev/articles/ttfb). The best performing apps are able to pick the right rendering strategy on a per-page basis, based on the tradeoffs of each strategy. + +Frameworks provide the option to use a server on any page if you want to, but do not force you to use a server. This allows you to pick the right rendering strategy for each page in your app. + +#### What About Server Components {/*server-components*/} + +The frameworks we recommend also include support for React Server Components. + +Server Components help solve these problems by moving routing and data fetching to the server, and allowing code splitting to be done for client components based on the data you render, instead of just the route rendered, and reducing the amount of JavaScript shipped for the best possible [loading sequence](https://www.patterns.dev/vanilla/loading-sequence). + +Server Components do not require a server. They can be run at build time on your CI server to create a static-site generated app (SSG) app, at runtime on a web server for a server-side rendered (SSR) app. + +See [Introducing zero-bundle size React Server Components](/blog/2020/12/21/data-fetching-with-react-server-components) and [the docs](/reference/rsc/server-components) for more info. + + + + + +#### Server Rendering is not just for SEO {/*server-rendering-is-not-just-for-seo*/} + +A common misunderstanding is that server rendering is only for [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO). + +While server rendering can improve SEO, it also improves performance by reducing the amount of JavaScript the user needs to download and parse before they can see the content on the screen. + +This is why the Chrome team [has encouraged](https://web.dev/articles/rendering-on-the-web) developers to consider static or server-side render over a full client-side approach to achieve the best possible performance. + + + +--- + +_Thank you to [Dan Abramov](https://bsky.app/profile/danabra.mov) for creating Create React App, and [Joe Haddad](https://github.com/Timer), [Ian Schmitz](https://github.com/ianschmitz), [Brody McKee](https://github.com/mrmckeb), and [many others](https://github.com/facebook/create-react-app/graphs/contributors) for maintaining Create React App over the years. Thank you to [Brooks Lybrand](https://bsky.app/profile/brookslybrand.bsky.social), [Dan Abramov](https://bsky.app/profile/danabra.mov), [Devon Govett](https://bsky.app/profile/devongovett.bsky.social), [Eli White](https://x.com/Eli_White), [Jack Herrington](https://bsky.app/profile/jherr.dev), [Joe Savona](https://x.com/en_JS), [Lauren Tan](https://bsky.app/profile/no.lol), [Lee Robinson](https://x.com/leeerob), [Mark Erikson](https://bsky.app/profile/acemarke.dev), [Ryan Florence](https://x.com/ryanflorence), [Sophie Alpert](https://bsky.app/profile/sophiebits.com), [Tanner Linsley](https://bsky.app/profile/tannerlinsley.com), and [Theo Browne](https://x.com/theo) for reviewing and providing feedback on this post._ + diff --git a/src/content/blog/index.md b/src/content/blog/index.md index 10b18edca..d150e8bdf 100644 --- a/src/content/blog/index.md +++ b/src/content/blog/index.md @@ -4,12 +4,24 @@ title: Blog React +<<<<<<< HEAD Este blog es la fuente oficial de las actualizaciones del equipo React. Cualquier cosa importante, incluidas las notas de la versión o las noticias de obsolescencia, se publicarán primero aquí. También puedes seguir la cuenta [@reactjs](https://twitter.com/reactjs) en Twitter, pero no te perderás nada esencial si solo lees este blog. +======= +This blog is the official source for the updates from the React team. Anything important, including release notes or deprecation notices, will be posted here first. + +You can also follow the [@react.dev](https://bsky.app/profiles/react.js) account on Bluesky, or [@reactjs](https://twitter.com/reactjs) account on Twitter, but you won’t miss anything essential if you only read this blog. +>>>>>>> 49284218b1f5c94f930f8a9b305040dbe7d3dd48
+ + +Today, we’re deprecating Create React App for new apps, and encouraging existing apps to migrate to a framework. We’re also providing docs for when a framework isn’t a good fit for your project, or you prefer to start by building a framework. + + + In the React 19 Upgrade Guide, we shared step-by-step instructions for upgrading your app to React 19. In this post, we'll give an overview of the new features in React 19, and how you can adopt them ... diff --git a/src/content/community/acknowledgements.md b/src/content/community/acknowledgements.md index 642853976..7f0de80d2 100644 --- a/src/content/community/acknowledgements.md +++ b/src/content/community/acknowledgements.md @@ -36,6 +36,8 @@ Nos gustaría reconocer a algunas personas que han hecho contribuciones signific * [Joe Critchley](https://github.com/joecritch) * [Jeff Morrison](https://github.com/jeffmo) * [Luna Ruan](https://github.com/lunaruan) +* [Luna Wei](https://github.com/lunaleaps) +* [Noah Lemen](https://github.com/noahlemen) * [Kathryn Middleton](https://github.com/kmiddleton14) * [Keyan Zhang](https://github.com/keyz) * [Marco Salazar](https://github.com/salazarm) @@ -51,9 +53,10 @@ Nos gustaría reconocer a algunas personas que han hecho contribuciones signific * [Samuel Susla](https://github.com/sammy-SC) * [Sander Spies](https://github.com/sanderspies) * [Sasha Aickin](https://github.com/aickin) -* [Sean Keegan](https://github.com/seanryankeegan) +* [Sathya Gunasekaran](https://github.com/gsathya) * [Sophia Shoemaker](https://github.com/mrscobbler) * [Sunil Pai](https://github.com/threepointone) +* [Tianyu Yao](https://github.com/) * [Tim Yung](https://github.com/yungsters) * [Xuan Huang](https://github.com/huxpro) diff --git a/src/content/community/conferences.md b/src/content/community/conferences.md index 6d84dfe3f..46636d4c9 100644 --- a/src/content/community/conferences.md +++ b/src/content/community/conferences.md @@ -11,20 +11,40 @@ Do you know of a local React.js conference? Add it here! (Please keep the list c ## Upcoming Conferences {/*upcoming-conferences*/} ### React Paris 2025 {/*react-paris-2025*/} -March 20 - 21, 2024. In-person in Paris, France (hybrid event) +March 20 - 21, 2025. In-person in Paris, France (hybrid event) [Website](https://react.paris/) - [Twitter](https://x.com/BeJS_) +### React Native Connection 2025 {/*react-native-connection-2025*/} +April 3 (Reanimated Training) + April 4 (Conference), 2025. Paris, France. + +[Website](https://reactnativeconnection.io/) - [X](https://x.com/reactnativeconn) - [Bluesky](https://bsky.app/profile/reactnativeconnect.bsky.social) + +### CityJS London 2025 {/*cityjs-london*/} +April 23 - 25, 2025. In-person in London, UK + +[Website](https://london.cityjsconf.org/) - [Twitter](https://x.com/cityjsconf) - [Bluesky](https://bsky.app/profile/cityjsconf.bsky.social) + ### App.js Conf 2025 {/*appjs-conf-2025*/} May 28 - 30, 2025. In-person in Kraków, Poland + remote [Website](https://appjs.co) - [Twitter](https://twitter.com/appjsconf) +### CityJS Athens 2025 {/*cityjs-athens*/} +May 27 - 31, 2025. In-person in Athens, Greece + +[Website](https://athens.cityjsconf.org/) - [Twitter](https://x.com/cityjsconf) - [Bluesky](https://bsky.app/profile/cityjsconf.bsky.social) + ### React Summit 2025 {/*react-summit-2025*/} June 13 - 17, 2025. In-person in Amsterdam, Netherlands + remote (hybrid event) [Website](https://reactsummit.com/) - [Twitter](https://x.com/reactsummit) +### React Nexus 2025 {/*react-nexus-2025*/} +July 03 - 05, 2025. In-person in Bangalore, India + +[Website](https://reactnexus.com/) - [Twitter](https://x.com/ReactNexus) - [Bluesky](https://bsky.app/profile/reactnexus.com) - [Linkedin](https://www.linkedin.com/company/react-nexus) - [YouTube](https://www.youtube.com/reactify_in) + ### React Universe Conf 2025 {/*react-universe-conf-2025*/} September 2-4, 2025. Wrocław, Poland. diff --git a/src/content/community/meetups.md b/src/content/community/meetups.md index 306a0d17b..859a032ad 100644 --- a/src/content/community/meetups.md +++ b/src/content/community/meetups.md @@ -57,7 +57,14 @@ title: Reuniones de React * [React Advanced London](https://guild.host/react-advanced-london) * [React Native London](https://guild.host/RNLDN) +<<<<<<< HEAD ## Francia {/*france*/} +======= +## Finland {/*finland*/} +* [Helsinki](https://www.meetabit.com/communities/react-helsinki) + +## France {/*france*/} +>>>>>>> 49284218b1f5c94f930f8a9b305040dbe7d3dd48 * [Lille](https://www.meetup.com/ReactBeerLille/) * [París](https://www.meetup.com/ReactJS-Paris/) @@ -136,9 +143,18 @@ title: Reuniones de React ## España {/*spain*/} * [Barcelona](https://www.meetup.com/ReactJS-Barcelona/) +<<<<<<< HEAD ## Suecia {/*sweden*/} * [Gotemburgo](https://www.meetup.com/ReactJS-Goteborg/) * [Estocolmo](https://www.meetup.com/Stockholm-ReactJS-Meetup/) +======= +## Sri Lanka {/*sri-lanka*/} +* [Colombo](https://www.javascriptcolombo.com/) + +## Sweden {/*sweden*/} +* [Goteborg](https://www.meetup.com/ReactJS-Goteborg/) +* [Stockholm](https://www.meetup.com/Stockholm-ReactJS-Meetup/) +>>>>>>> 49284218b1f5c94f930f8a9b305040dbe7d3dd48 ## Suiza {/*switzerland*/} * [Zúrich](https://www.meetup.com/Zurich-ReactJS-Meetup/) diff --git a/src/content/community/team.md b/src/content/community/team.md index 5000ece89..4c8f48882 100644 --- a/src/content/community/team.md +++ b/src/content/community/team.md @@ -22,12 +22,25 @@ Engineer at Meta Dan comenzó a programar después de que accidentalmente descubrió Visual Basic dentro de Microsoft PowerPoint. Ha encontrado su verdadera vocación al convertir los tweets de [Sebastian](#sebastian-markbåge) en extensas publicaciones de blog. Dan gana ocasionalmente en Fortnite escondiéndose en un arbusto hasta que termina el juego. +<<<<<<< HEAD Eli se metió en la programación después de que lo suspendieran de la escuela secundaria por piratear. Lleva trabajando en React y React Native desde 2017. Le gusta comer cosas ricas, especialmente helado y tarta de manzana. Puedes encontrar a Eli probando actividades extravagantes como parkour, paracaidismo en interiores y acrobacia en tela. Poco después de aprender AutoHotkey, Jack empezó a escribir scripts para automatizar todo lo que se le pasara por la mente. Cuando alcanzó limitaciones allí, se sumergió de lleno en el desarrollo de aplicaciones web y no ha mirado hacia atrás. Más recientemente, Jack trabajó en la plataforma web de Instagram antes de pasar a React. Su lenguaje de programación favorito es JSX. +======= + + Eli got into programming after he got suspended from middle school for hacking. He has been working on React and React Native since 2017. He enjoys eating treats, especially ice cream and apple pie. You can find Eli trying quirky activities like parkour, indoor skydiving, and aerial silks. + + + + Hendrik’s journey in tech started in the late 90s when he built his first websites with Netscape Communicator. After earning a diploma in computer science and working at digital agencies, he built a React Server Components bundler and library, paving the way to his role on the Next.js team. Outside of work, he enjoys cycling and tinkering in his workshop. + + + + Shortly after being introduced to AutoHotkey, Jack had written scripts to automate everything he could think of. When reaching limitations there, he dove headfirst into web app development and hasn't looked back. Most recently, Jack worked on the web platform at Instagram before moving to React. His favorite programming language is JSX. +>>>>>>> 49284218b1f5c94f930f8a9b305040dbe7d3dd48 @@ -38,14 +51,24 @@ Engineer at Meta Joe planeaba especializarse en matemáticas y filosofía, pero se metió en la informática después de escribir simulaciones de física en Matlab. Antes de React, trabajó en Relay, RSocket.js y el lenguaje de programación Skip. Cuando no está construyendo algún tipo de sistema reactivo, le gusta correr, estudiar japonés y pasar tiempo con su familia. +<<<<<<< HEAD Josh se especializó en Matemáticas y descubrió la programación en la universidad. Su primer trabajo como desarrollador profesional fue programar cálculos de tarifas de seguros en Microsoft Excel, el parangón de la Programación Reactiva, que debe ser la razón por la que ahora trabaja en React. En el medio de ese tiempo Josh ha sido un IC, Gerente y Ejecutivo en algunas nuevas empresas. fuera del trabajo le gusta empujar sus límites con la cocina. +======= + + Jordan started coding by building iPhone apps, where he was pushing and popping view controllers before he knew that for-loops were a thing. He enjoys working on technology that developers love, which naturally drew him to React. Outside of work he enjoys reading, kiteboarding, and playing guitar. + + + + Josh majored in Mathematics and discovered programming while in college. His first professional developer job was to program insurance rate calculations in Microsoft Excel, the paragon of Reactive Programming which must be why he now works on React. In between that time Josh has been an IC, Manager, and Executive at a few startups. outside of work he likes to push his limits with cooking. +>>>>>>> 49284218b1f5c94f930f8a9b305040dbe7d3dd48 La carrera de programadora de Lauren alcanzó su punto máximo cuando descubrió la etiqueta ``. Ha estado persiguiendo ese momento desde entonces. Estudió Finanzas en lugar de Ciencias de la Computación en la universidad, por lo que aprendió a programar en Excel. Lauren disfruta lanzando memes descarados en el chat, jugando videojuegos con su pareja, aprendiendo coreano y acariciando a su perra Zelda. +<<<<<<< HEAD Luna aprendió por primera vez los fundamentos de python a la edad de 6 años de la mano de su padre. Desde entonces, ha sido imparable. Luna aspira a ser una generación z, y el camino hacia el éxito está pavimentado con la defensa del medio ambiente, la jardinería urbana y mucho tiempo de calidad con su Voo-Doo'd (como en la foto). @@ -60,6 +83,22 @@ Engineer at Meta El interés de Noah en la programación de interfaces de usuario se despertó durante su educación en tecnología musical en la Universidad de Nueva York. En Meta, ha trabajando en herramientas internas, navegadores, rendimiento web y actualmente está concentrado en React. Fuera del trabajo, puedes encontrar a Noah jugando con sintetizadores o pasando el tiempo con su gato. +======= + + Matt stumbled into coding, and since then, has become enamored with creating things in communities that can’t be created alone. Prior to React, he worked on YouTube, the Google Assistant, Fuchsia, and Google Cloud AI and Evernote. When he's not trying to make better developer tools he enjoys the mountains, jazz, and spending time with his family. + + + + Mike went to grad school dreaming of becoming a professor but realized that he liked building things a lot more than writing grant applications. Mike joined Meta to work on Javascript infrastructure, which ultimately led him to work on the React Compiler. When not hacking on either Javascript or OCaml, Mike can often be found hiking or skiing in the Pacific Northwest. + + + + Mofei started programming when she realized it can help her cheat in video games. She focused on operating systems in undergrad / grad school, but now finds herself happily tinkering on React. Outside of work, she enjoys debugging bouldering problems and planning her next backpacking trip(s). + + + + Pieter studied building science but after failing to get a job he made himself a website and things escalated from there. At Meta, he enjoys working on performance, languages and now React. When he's not programming you can find him off-road in the mountains. +>>>>>>> 49284218b1f5c94f930f8a9b305040dbe7d3dd48 @@ -70,12 +109,17 @@ Engineer at Meta Ruslan's introduction to UI programming started when he was a kid by manually editing HTML templates for his custom gaming forums. Somehow, he ended up majoring in Computer Science. He enjoys music, games, and memes. Mostly memes. +<<<<<<< HEAD Sathya odiaba el Libro del Dragón en la escuela, pero de alguna manera terminó trabajando en compiladores toda su carrera. Cuando no está compilando componentes de React, está bebiendo café o comiendo otra Dosa. Sebastian se especializó en psicología. Suele ser callado. Incluso, cuando dice algo, a menudo no tiene sentido para el resto de nosotros hasta unos meses después. La forma correcta de pronunciar su apellido es "mark-boa-geh", pero se ha decantado por "mark-beige" por pragmatismo, y así es como se acerca a React. +======= + + Sebastian majored in psychology. He's usually quiet. Even when he says something, it often doesn't make sense to the rest of us until a few months later. The correct way to pronounce his surname is "mark-boa-geh" but he settled for "mark-beige" out of pragmatism -- and that's how he approaches React. +>>>>>>> 49284218b1f5c94f930f8a9b305040dbe7d3dd48 @@ -90,12 +134,17 @@ Engineer at Meta Cuatro días después del lanzamiento de React, Sophie reescribió la totalidad de su proyecto actual para utilizarlo, lo que ahora se da cuenta de que quizás fue un poco imprudente. Después de convertirse en la principal responsable del proyecto, se preguntó por qué Facebook no le pagaba como a los demás y se unió oficialmente al equipo para dirigir React durante sus años de adolescencia. Aunque dejó el trabajo hace años, sigue participando en los chats de grupo del equipo y "aportando valor". +<<<<<<< HEAD El interés de Tianyu por las computadoras empezó de niño porque le encantan los videojuegos. Por eso se especializó en informática y sigue jugando a juegos infantiles como League of Legends. Cuando no está delante de una computadora, le gusta jugar con sus dos gatitos, hacer senderismo y navegar en kayak. Yuzhi estudió Ciencias de la Computación en la escuela. Le gustaba la gratificación instantánea de ver cómo el código cobraba vida sin tener que estar físicamente en un laboratorio. Ahora es gerente en React org. Antes de ser gerente, trabajaba en el framework de obtención de datos Relay. En su tiempo libre, Yuzhi disfruta optimizando su vida mediante proyectos de jardinería y mejoras del hogar. +======= + + Yuzhi studied Computer Science in school. She liked the instant gratification of seeing code come to life without having to physically be in a laboratory. Now she’s a manager in the React org. Before management, she used to work on the Relay data fetching framework. In her spare time, Yuzhi enjoys optimizing her life via gardening and home improvement projects. +>>>>>>> 49284218b1f5c94f930f8a9b305040dbe7d3dd48 ## Colaboradores anteriores {/*past-contributors*/} diff --git a/src/content/community/versioning-policy.md b/src/content/community/versioning-policy.md index 13a5d1a5e..8ca3b7a74 100644 --- a/src/content/community/versioning-policy.md +++ b/src/content/community/versioning-policy.md @@ -8,7 +8,11 @@ Todas las compilaciones estables de React pasan por un alto nivel de pruebas y s +<<<<<<< HEAD Para una lista de versiones anteriores consulta la página de [Versiones](/versions). +======= +This versioning policy describes our approach to version numbers for packages such as `react` and `react-dom`. For a list of previous releases, see the [Versions](/versions) page. +>>>>>>> 49284218b1f5c94f930f8a9b305040dbe7d3dd48 ## Lanzamientos estables {/*stable-releases*/} @@ -24,7 +28,13 @@ Las versiones mayores también pueden contener nuevas funcionalidades, y cualqui Las versiones menores son el tipo de versión más común. +<<<<<<< HEAD ### Cambios importantes {/*breaking-changes*/} +======= +We know our users continue to use old versions of React in production. If we learn of a security vulnerability in React, we release a backported fix for all major versions that are affected by the vulnerability. + +### Breaking changes {/*breaking-changes*/} +>>>>>>> 49284218b1f5c94f930f8a9b305040dbe7d3dd48 Los cambios importantes son inconvenientes para todos, por lo que intentamos minimizar el número de versiones mayores; por ejemplo, React 15 fue lanzado en abril de 2016 y React 16 fue lanzado en septiembre de 2017, y React 17 fue lanzado en octubre de 2020. diff --git a/src/content/learn/add-react-to-an-existing-project.md b/src/content/learn/add-react-to-an-existing-project.md index b79523265..f36341cb7 100644 --- a/src/content/learn/add-react-to-an-existing-project.md +++ b/src/content/learn/add-react-to-an-existing-project.md @@ -45,7 +45,11 @@ Un entorno de JavaScript modular te permite escribir tus componentes React en ar * **Si tu aplicación ya está dividida en archivos que utilizan la sintaxis `import`,** prueba a utilizar tu configuración existente. Comprueba si escribir `
` en tu código JS causa un error de sintaxis. Si causa un error de sintaxis, es posible que necesites [transformar tu código JavaScript con Babel](https://babeljs.io/setup), y habilitar el [_preset_ de Babel React](https://babeljs.io/docs/babel-preset-react) para utilizar JSX. +<<<<<<< HEAD * **Si tu aplicación no tiene una configuración existente para compilar módulos JavaScript,** configurarlo con [Vite](https://es.vitejs.dev/). La comunidad de Vite mantienen [varias integraciones con *frameworks* de backend](https://github.com/vitejs/awesome-vite#integrations-with-backends), incluyendo Rails, Django y Laravel. Si tu *framework* de backend no aparece en la lista, [sigue esta guía](https://es.vitejs.dev/guide/backend-integration.html) para integrar la compilación con Vite con tu backend de forma manual. +======= +* **If your app doesn't have an existing setup for compiling JavaScript modules,** set it up with [Vite](https://vite.dev/). The Vite community maintains [many integrations with backend frameworks](https://github.com/vitejs/awesome-vite#integrations-with-backends), including Rails, Django, and Laravel. If your backend framework is not listed, [follow this guide](https://vite.dev/guide/backend-integration.html) to manually integrate Vite builds with your backend. +>>>>>>> 49284218b1f5c94f930f8a9b305040dbe7d3dd48 Para comprobar que tu configuración funciona, lanza el siguiente comando en el directorio de tu proyecto: @@ -85,7 +89,11 @@ Si el contenido completo de tu página fue reemplazado por un "¡Hola, mundo!", +<<<<<<< HEAD Integrar un entorno de JavaScript modular en un proyecto existente por primera vez puede ser intimidante, ¡pero vale la pena! Si te quedas atascado, prueba nuestros [recursos de la comunidad](/community) o el [Vite Chat](https://chat.vitejs.dev/). +======= +Integrating a modular JavaScript environment into an existing project for the first time can feel intimidating, but it's worth it! If you get stuck, try our [community resources](/community) or the [Vite Chat](https://chat.vite.dev/). +>>>>>>> 49284218b1f5c94f930f8a9b305040dbe7d3dd48 diff --git a/src/content/learn/building-a-react-framework.md b/src/content/learn/building-a-react-framework.md new file mode 100644 index 000000000..50e34ff65 --- /dev/null +++ b/src/content/learn/building-a-react-framework.md @@ -0,0 +1,137 @@ +--- +title: Building a React Framework +--- + + + +If your app has constraints not well-served by existing frameworks, or you prefer to solve these problems yourself, you can build your own framework. + + + + + +### Consider using an existing framework {/*you-should-probably-use-a-framework*/} + +Building a framework is complex and requires extensive expertise across various domains. This complexity is not limited to React — it is a widespread challenge encountered by all UI libraries. Using an existing framework can save significant time and effort by allowing you to focus on building your application. Existing frameworks have tested, robust features and community support. + +For a list of recommended frameworks, check out [Creating a React App](/learn/creating-a-react-app). + + + +Building a framework is a large undertaking that often requires expertise in many different areas. Understanding your goals and requirements before starting to build your own framework can help guide your development process and save a considerable amount of time. + +For example, if you need to build a framework that integrates with a specific system or infrastructure, it's important to understand the features and limitations of those systems. Understanding your constraints can help guide your framework development process. + +If you are building your own framework to learn, using popular tools like Vite and React Router can be a good starting point and let you focus on how to combine different tools to build a framework. + +## Step 1: Install a build tool {/*step-1-install-a-build-tool*/} + +The first step is to install a build tool like `vite`, `parcel`, or `rsbuild`. These build tools provide features to package and run source code, provide a development server for local development and a build command to deploy your app to a production server. + +### Vite {/*vite*/} + +[Vite](https://vite.dev/) is a build tool that aims to provide a faster and leaner development experience for modern web projects. + + +npm create vite@latest my-app -- --template react + + +Vite is opinionated and comes with sensible defaults out of the box. Vite has a rich ecosystem of plugins to support fast refresh, JSX, Babel/SWC, and other common features. See Vite's [React plugin](https://vite.dev/plugins/#vitejs-plugin-react) or [React SWC plugin](https://vite.dev/plugins/#vitejs-plugin-react-swc) and [React SSR example project](https://vite.dev/guide/ssr.html#example-projects) to get started. + +Vite is already being used as a build tool in one of our [recommended frameworks](/learn/creating-a-react-app): [React Router](https://reactrouter.com/start/framework/installation). + +### Parcel {/*parcel*/} + +[Parcel](https://parceljs.org/) combines a great out-of-the-box development experience with a scalable architecture that can take your project from just getting started to massive production applications. + + +npm install --save-dev parcel + + +Parcel supports fast refresh, JSX, TypeScript, Flow, and styling out of the box. See [Parcel's React recipe](https://parceljs.org/recipes/react/#getting-started) to get started. + +### Rsbuild {/*rsbuild*/} + +[Rsbuild](https://rsbuild.dev/) is an Rspack-powered build tool that provides a seamless development experience for React applications. It comes with carefully tuned defaults and performance optimizations ready to use. + + +npx create-rsbuild --template react + + +Rsbuild includes built-in support for React features like fast refresh, JSX, TypeScript, and styling. See [Rsbuild's React guide](https://rsbuild.dev/guide/framework/react) to get started. + + + +#### Metro for React Native {/*react-native*/} + +If you'd like your framework to support React Native you'll need to use [Metro](https://metrobundler.dev/), the JavaScript bundler for React Native. Metro supports bundling for platforms like iOS and Android, but lacks many features when compared to Vite or Parcel. We recommend starting with Vite or Parcel unless your project requires React Native support. + + + +## Step 2: Build your framework {/*step-2-build-your-framework*/} + +The build tool you select starts with a client-only, single-page app (SPA). While SPAs can be a good place to start, many SPAs will encounter problems as they grow. Frameworks can provide the scaffolding to solve these problems. Most frameworks will implement routing, code-splitting, different rendering strategies, and data-fetching. These features are interconnected. For example, if you use a router that only works on the client it could prevent you from implementing server-side rendering. The best frameworks provide a cohesive, consistent experience across these features for developers and users. + +### Routing {/*routing*/} + +Routing determines what to display when a user visits a particular URL. You need to set up a router to map URLs to different parts of your app. You'll also need to handle nested routes, route parameters, and query parameters. Most modern routers use file-based routing. Routing can be integrated with other features like: + +* **Rendering strategies** to enable different rendering strategies on different routes, so you can introduce new strategies without having to rewrite your whole app. This can decrease the time it takes for the first byte of content to be loaded ([Time to First Byte](https://web.dev/articles/ttfb)), the first piece of content to be rendered ([First Contentful Paint](https://web.dev/articles/fcp)), and the largest visible content of the app to be rendered ([Largest Contentful Paint](https://web.dev/articles/lcp)). +* **Data fetching** to enable data fetching before the page loads on a route. This can prevent layout shifts ([Cumulative Layout Shift](https://web.dev/articles/cls)) and decrease the time it takes for the largest visible content of the app to render ([Largest Contentful Paint](https://web.dev/articles/lcp)) +* **Code splitting** to reduce the JavaScript bundle size sent to the client and improve performance on underpowered devices. This can reduce the time it takes for the browser to respond to a user interaction ([First Input Delay](https://web.dev/articles/fid)) and the largest visible content of the app to be rendered ([Largest Contentful Paint](https://web.dev/articles/lcp)). + +If you're not sure how to get started with routing, we recommend using [React Router](https://reactrouter.com/start/framework/custom) or [Tanstack Router](https://tanstack.com/router/latest). + +### Data-fetching {/*data-fetching*/} + +Data-fetching is the process of fetching data from a server or other data source. You need to set up or create a data-fetching library to handle data retrieval from your server and manage the state of that data. You'll also need to handle loading states, error states, and caching data. Data fetching can be integrated with features like: + +* **Routing** to enable data fetching to take place before page loads. This can improve how quickly a page loads and becomes visible to users ([Largest Contentful Paint](https://web.dev/lcp)) and reduce time it takes for your app to be interactive ([Time to Interactive](https://web.dev/tti)). +* **Rendering strategies** to prerender fetched data before it is sent to the client. This can reduce the time it takes for the largest visible content of the app to render ([Largest Contentful Paint](https://web.dev/lcp)). + +Integrating routing and data fetching is particularly important to prevent network waterfalls. In a SPA, if you fetch data during a component's initial render, the first data fetch is delayed until all code has loaded and components have finished rendering. This is commonly known as a waterfall: instead of fetching data at the same time as your code is loading, you need to first wait for your code to load before fetching data. To address these waterfalls, your app needs to fetch the data for each route in parallel with sending code to the browser. + +Popular data fetching libraries that you can use as a part of your framework include [React Query](https://react-query.tanstack.com/), [SWR](https://swr.vercel.app/), [Apollo](https://www.apollographql.com/docs/react), and [Relay](https://relay.dev/). + +### Rendering strategies {/*rendering-strategies*/} + +Since the build tool you select only support single page apps (SPAs) you'll need to implement other [rendering patterns](https://www.patterns.dev/vanilla/rendering-patterns) like server-side rendering (SSR), static site generation (SSG), and/or React Server Components (RSC). Even if you don't need these features at first, in the future there may be some routes that would benefit SSR, SSG or RSC. + +* **Single-page apps (SPA)** load a single HTML page and dynamically updates the page as the user interacts with the app. SPAs are fast and responsive, but they can have slower initial load times. SPAs are the default architecture for most build tools. + +* **Streaming Server-side rendering (SSR)** renders a page on the server and sends the fully rendered page to the client. SSR can improve performance, but it can be more complex to set up and maintain than a single-page app. With the addition of streaming, SSR can be very complex to set up and maintain. See [Vite's SSR guide]( https://vite.dev/guide/ssr). + +* **Static site generation (SSG)** generates static HTML files for your app at build time. SSG can improve performance, but it can be more complex to set up and maintain than server-side rendering. + +* **React Server Components (RSC)** lets you mix build-time, server-only, and interactive components in a single React tree. RSC can improve performance, but it currently requires deep expertise to set up and maintain. See [Parcel's RSC examples](https://github.com/parcel-bundler/rsc-examples). + +Your rendering strategies need to integrate with your router so apps built with your framework can choose the rendering strategy on a per-route level. This will enable different rendering strategies without having to rewrite your whole app. For example, the landing page for your app might benefit from being statically generated (SSG), while a page with a content feed might perform best with server-side rendering. Using the right rendering strategy for the right routes can decrease the time it takes for the first byte of content to be loaded ([Time to First Byte](https://web.dev/articles/ttfb)), the first piece of content to render ([First Contentful Paint](https://web.dev/articles/fcp)), and the largest visible content of the app to render ([Largest Contentful Paint](https://web.dev/articles/lcp)). + +### Code-splitting {/*code-splitting*/} + +Code-splitting is the process of breaking your app into smaller bundles that can be loaded on demand. An app's code size increases with every new feature and additional dependency. Apps can become slow to load because all of the code for the entire app needs to be sent before it can be used. Caching, reducing features/dependencies, and moving some code to run on the server can help mitigate slow loading but are incomplete solutions that can sacrifice functionality if overused. + +Similarly, if you rely on the apps using your framework to split the code, you might encounter situations where loading becomes slower than if no code splitting were happening at all. For example, [lazily loading](/reference/react/lazy) a chart delays sending the code needed to render the chart, splitting the chart code from the rest of the app. [Parcel supports code splitting with React.lazy](https://parceljs.org/recipes/react/#code-splitting). However, if the chart loads its data *after* it has been initially rendered you are now waiting twice. This is a waterfall: rather than fetching the data for the chart and sending the code to render it simultaneously, you must wait for each step to complete one after the other. + +Splitting code by route, when integrated with bundling and data fetching, can reduce the initial load time of your app and the time it takes for the largest visible content of the app to render ([Largest Contentful Paint](https://web.dev/articles/lcp)). + +### And more... {/*and-more*/} + +These are just a few examples of the features a framework will need to consider. + +There are many other problems that users need to solve like: + +- Accessibility +- Asset loading +- Authentication +- Error handling +- Mutating data +- Navigations +- Nested routes +- Optimistic updates +- Caching +- Progressive enhancement +- Static site generation +- Server-side rendering + +Many of these problems individually can be difficult as each problem is interconnected with the others and can require deep expertise in problem areas you may not be familiar with. If you don't want to solve these problems on your own, you can [get started with a framework](/learn/creating-a-react-app) that provides these features out of the box. diff --git a/src/content/learn/creating-a-react-app.md b/src/content/learn/creating-a-react-app.md new file mode 100644 index 000000000..cf7359e45 --- /dev/null +++ b/src/content/learn/creating-a-react-app.md @@ -0,0 +1,116 @@ +--- +title: Creating a React App +--- + + + +If you want to build a new app or website with React, we recommend starting with a framework. + + + +## Recommended React frameworks {/*bleeding-edge-react-frameworks*/} + +These recommended frameworks support all the features you need to deploy and scale your app in production. They have integrated the latest React features and take advantage of React’s architecture. + + + +#### React frameworks do not require a server. {/*react-frameworks-do-not-require-a-server*/} + +All the frameworks on this page can create single-page apps. Single-page apps can be deployed to a [CDN](https://developer.mozilla.org/en-US/docs/Glossary/CDN) or static hosting service and do not need a server. If you would like to enable features that require a server (like server side rendering), you can opt-in on individual routes without rewriting your app. + + + +### Next.js (App Router) {/*nextjs-app-router*/} + +**[Next.js's App Router](https://nextjs.org/docs) is a React framework that takes full advantage of React's architecture to enable full-stack React apps.** + + +npx create-next-app@latest + + +Next.js is maintained by [Vercel](https://vercel.com/). You can [deploy a Next.js app](https://nextjs.org/docs/app/building-your-application/deploying) to any Node.js or serverless hosting, or to your own server. Next.js also supports [static export](https://nextjs.org/docs/app/building-your-application/deploying/static-exports) which doesn't require a server. Vercel additionally provides opt-in paid cloud services. + +### React Router (v7) {/*react-router-v7*/} + +**[React Router](https://reactrouter.com/start/framework/installation) is the most popular routing library for React and can be paired with Vite to create a full-stack React framework**. It emphasizes standard Web APIs and has several [ready to deploy templates](https://github.com/remix-run/react-router-templates) for various JavaScript runtimes and platforms. + +To create a new React Router framework project, run: + + +npx create-react-router@latest + + +React Router is maintained by [Shopify](https://www.shopify.com). + +### Expo (for native apps) {/*expo*/} + +**[Expo](https://expo.dev/) is a React framework that lets you create universal Android, iOS, and web apps with truly native UIs.** It provides an SDK for [React Native](https://reactnative.dev/) that makes the native parts easier to use. To create a new Expo project, run: + + +npx create-expo-app@latest + + +If you're new to Expo, check out the [Expo tutorial](https://docs.expo.dev/tutorial/introduction/). + +Expo is maintained by [Expo (the company)](https://expo.dev/about). Building apps with Expo is free, and you can submit them to the Google and Apple app stores without restrictions. Expo additionally provides opt-in paid cloud services. + + +## Other options {/*other-options*/} + +There are other up-and-coming frameworks that are working towards our full stack React vision: + +- [TanStack Start (Beta)](https://tanstack.com/): TanStack Start is a full-stack React framework powered by TanStack Router. It provides a full-document SSR, streaming, server functions, bundling, and more using tools like Nitro and Vite. +- [RedwoodJS](https://redwoodjs.com/): Redwood is a full stack React framework with lots of pre-installed packages and configuration that makes it easy to build full-stack web applications. + + + +#### Which features make up the React team’s full-stack architecture vision? {/*which-features-make-up-the-react-teams-full-stack-architecture-vision*/} + +Next.js's App Router bundler fully implements the official [React Server Components specification](https://github.com/reactjs/rfcs/blob/main/text/0188-server-components.md). This lets you mix build-time, server-only, and interactive components in a single React tree. + +For example, you can write a server-only React component as an `async` function that reads from a database or from a file. Then you can pass data down from it to your interactive components: + +```js +// This component runs *only* on the server (or during the build). +async function Talks({ confId }) { + // 1. You're on the server, so you can talk to your data layer. API endpoint not required. + const talks = await db.Talks.findAll({ confId }); + + // 2. Add any amount of rendering logic. It won't make your JavaScript bundle larger. + const videos = talks.map(talk => talk.video); + + // 3. Pass the data down to the components that will run in the browser. + return ; +} +``` + +Next.js's App Router also integrates [data fetching with Suspense](/blog/2022/03/29/react-v18#suspense-in-data-frameworks). This lets you specify a loading state (like a skeleton placeholder) for different parts of your user interface directly in your React tree: + +```js +}> + + +``` + +Server Components and Suspense are React features rather than Next.js features. However, adopting them at the framework level requires buy-in and non-trivial implementation work. At the moment, the Next.js App Router is the most complete implementation. The React team is working with bundler developers to make these features easier to implement in the next generation of frameworks. + + + + + + +#### Do you recommend Vite? {/*do-you-recommend-vite*/} + +We provide several Vite-based recommendations. + +React Router v7 is a Vite based framework which allows you to use Vite's fast development server and build tooling with a framework that provides routing and data fetching. Just like the other frameworks we recommend, you can build a SPA with React Router v7. + +We also recommend using Vite when [adding React to an existing project](/learn/add-react-to-an-existing-project), or [building a framework](/learn/building-a-react-framework). + +Just like Svelte has Sveltekit, Vue has Nuxt, and Solid has SolidStart, React recommends using a framework that integrates with build tools like Vite for new projects. + + + +----- + +_If you’re a framework author interested in being included on this page, [please let us know](https://github.com/reactjs/react.dev/issues/new?assignees=&labels=type%3A+framework&projects=&template=3-framework.yml&title=%5BFramework%5D%3A+)._ \ No newline at end of file diff --git a/src/content/learn/installation.md b/src/content/learn/installation.md index acd69e969..eb3327622 100644 --- a/src/content/learn/installation.md +++ b/src/content/learn/installation.md @@ -8,6 +8,7 @@ React se ha diseñado desde un inicio para una adopción gradual. Puedes usar ta +<<<<<<< HEAD * [Cómo iniciar un nuevo proyecto de React](/learn/start-a-new-react-project) @@ -18,6 +19,9 @@ React se ha diseñado desde un inicio para una adopción gradual. Puedes usar ta ## Prueba React {/*try-react*/} +======= +## Try React {/*try-react*/} +>>>>>>> 49284218b1f5c94f930f8a9b305040dbe7d3dd48 No necesitas instalar nada para jugar con React. ¡Prueba editar este ejemplo de código! @@ -39,6 +43,7 @@ Puedes editarlo directamente o abrirlo en una nueva pestaña presionando el bot La mayoría de las páginas de la documentación de React contienen ejemplos interactivos como este. Fuera de la documentación de React, también existen muchos *sandboxes* en línea que permiten usar React: por ejemplo, [CodeSandbox](https://codesandbox.io/s/new), [Stackblitz](https://stackblitz.com/fork/react), o [CodePen](https://codepen.io/pen?template=QWYVwWN). +<<<<<<< HEAD ### Probar React localmente {/*try-react-locally*/} Para probar React de forma local en tu computadora, [descarga esta página HTML](https://gist.githubusercontent.com/gaearon/0275b1e1518599bbeafcde4722e79ed1/raw/db72dcbf3384ee1708c4a07d3be79860db04bff0/example.html). ¡Ábrela en tu editor y en tu navegador! @@ -46,10 +51,33 @@ Para probar React de forma local en tu computadora, [descarga esta página HTML] ## Iniciar un nuevo proyecto React {/*start-a-react-project*/} Si quieres crear una aplicación o un sitio web completamente con React, [inicia un nuevo proyecto React](/learn/start-a-new-react-project). +======= +To try React locally on your computer, [download this HTML page.](https://gist.githubusercontent.com/gaearon/0275b1e1518599bbeafcde4722e79ed1/raw/db72dcbf3384ee1708c4a07d3be79860db04bff0/example.html) Open it in your editor and in your browser! + +## Creating a React App {/*creating-a-react-app*/} + +If you want to start a new React app, you can [create a React app](/learn/creating-a-react-app) using a recommended framework. + +## Build a React Framework {/*build-a-react-framework*/} + +If a framework is not a good fit for your project, or you prefer to start by building your own framework, you can [build your own React framework](/learn/building-a-react-framework). +>>>>>>> 49284218b1f5c94f930f8a9b305040dbe7d3dd48 ## Añadir React a un proyecto existente {/*add-react-to-an-existing-project*/} +<<<<<<< HEAD Si quieres probar usando React en tu aplicación existente o en un sitio web, [añade React a un proyecto existente](/learn/add-react-to-an-existing-project). +======= +If want to try using React in your existing app or a website, you can [add React to an existing project.](/learn/add-react-to-an-existing-project) + +## Deprecated Options {/*deprecated-options*/} + +### Create React App (Deprecated) {/*create-react-app-deprecated*/} + +Create React App is a deprecated tool, previously recommended for creating new React apps. If you want to start a new React app, you can [create a React app](/learn/creating-a-react-app) using a recommended framework. + +For more information, see [Sunsetting Create React App](/blog/2025/02/14/sunsetting-create-react-app). +>>>>>>> 49284218b1f5c94f930f8a9b305040dbe7d3dd48 ## Próximos pasos {/*next-steps*/} diff --git a/src/content/learn/setup.md b/src/content/learn/setup.md new file mode 100644 index 000000000..84608b427 --- /dev/null +++ b/src/content/learn/setup.md @@ -0,0 +1,32 @@ +--- +title: Setup +--- + + +React integrates with tools like editors, TypeScript, browser extensions, and compliers. This section will help you get your environment set up. + + + +## Editor Setup {/*editor-setup*/} + +See our [recommended editors](/learn/editor-setup) and learn how to set them up to work with React. + +## Using TypeScript {/*using-typescript*/} + +TypeScript is a popular way to add type definitions to JavaScript codebases. [Learn how to integrate TypeScript into your React projects](/learn/typescript). + +## React Developer Tools {/*react-developer-tools*/} + +React Developer Tools is a browser extension that can inspect React components, edit props and state, and identify performance problems. Learn how to install it [here](learn/react-developer-tools). + +## React Compiler {/*react-compiler*/} + +React Compiler is a tool that automatically optimizes your React app. [Learn more](/learn/react-compiler). + +## Start a React Project from scratch {/*start-a-react-project-from-scratch*/} + +If you want to build your own framework, you can [start a React project from scratch](/learn/start-a-react-project-from-scratch). + +## Next steps {/*next-steps*/} + +Head to the [Quick Start](/learn) guide for a tour of the most important React concepts you will encounter every day. diff --git a/src/content/reference/react-dom/client/createRoot.md b/src/content/reference/react-dom/client/createRoot.md index 64d87873a..d653b473d 100644 --- a/src/content/reference/react-dom/client/createRoot.md +++ b/src/content/reference/react-dom/client/createRoot.md @@ -344,776 +344,134 @@ export default function App({counter}) { No es común llamar a `render` más de una vez. En cambio, se suele [actualizar el estado](/reference/react/useState) dentro de uno de los componentes. -### Show a dialog for uncaught errors {/*show-a-dialog-for-uncaught-errors*/} +### Error logging in production {/*error-logging-in-production*/} -By default, React will log all uncaught errors to the console. To implement your own error reporting, you can provide the optional `onUncaughtError` root option: +By default, React will log all errors to the console. To implement your own error reporting, you can provide the optional error handler root options `onUncaughtError`, `onCaughtError` and `onRecoverableError`: -```js [[1, 6, "onUncaughtError"], [2, 6, "error", 1], [3, 6, "errorInfo"], [4, 10, "componentStack"]] -import { createRoot } from 'react-dom/client'; - -const root = createRoot( - document.getElementById('root'), - { - onUncaughtError: (error, errorInfo) => { - console.error( - 'Uncaught error', - error, - errorInfo.componentStack - ); - } - } -); -root.render(); -``` - -The onUncaughtError option is a function called with two arguments: - -1. The error that was thrown. -2. An errorInfo object that contains the componentStack of the error. - -You can use the `onUncaughtError` root option to display error dialogs: - - - -```html public/index.html hidden - - - - My app - - - - - -
- - -``` - -```css src/styles.css active -label, button { display: block; margin-bottom: 20px; } -html, body { min-height: 300px; } - -#error-dialog { - position: absolute; - top: 0; - right: 0; - bottom: 0; - left: 0; - background-color: white; - padding: 15px; - opacity: 0.9; - text-wrap: wrap; - overflow: scroll; -} - -.text-red { - color: red; -} - -.-mb-20 { - margin-bottom: -20px; -} - -.mb-0 { - margin-bottom: 0; -} - -.mb-10 { - margin-bottom: 10px; -} - -pre { - text-wrap: wrap; -} - -pre.nowrap { - text-wrap: nowrap; -} - -.hidden { - display: none; -} -``` - -```js src/reportError.js hidden -function reportError({ title, error, componentStack, dismissable }) { - const errorDialog = document.getElementById("error-dialog"); - const errorTitle = document.getElementById("error-title"); - const errorMessage = document.getElementById("error-message"); - const errorBody = document.getElementById("error-body"); - const errorComponentStack = document.getElementById("error-component-stack"); - const errorStack = document.getElementById("error-stack"); - const errorClose = document.getElementById("error-close"); - const errorCause = document.getElementById("error-cause"); - const errorCauseMessage = document.getElementById("error-cause-message"); - const errorCauseStack = document.getElementById("error-cause-stack"); - const errorNotDismissible = document.getElementById("error-not-dismissible"); - - // Set the title - errorTitle.innerText = title; - - // Display error message and body - const [heading, body] = error.message.split(/\n(.*)/s); - errorMessage.innerText = heading; - if (body) { - errorBody.innerText = body; - } else { - errorBody.innerText = ''; - } - - // Display component stack - errorComponentStack.innerText = componentStack; - - // Display the call stack - // Since we already displayed the message, strip it, and the first Error: line. - errorStack.innerText = error.stack.replace(error.message, '').split(/\n(.*)/s)[1]; - - // Display the cause, if available - if (error.cause) { - errorCauseMessage.innerText = error.cause.message; - errorCauseStack.innerText = error.cause.stack; - errorCause.classList.remove('hidden'); - } else { - errorCause.classList.add('hidden'); - } - // Display the close button, if dismissible - if (dismissable) { - errorNotDismissible.classList.add('hidden'); - errorClose.classList.remove("hidden"); - } else { - errorNotDismissible.classList.remove('hidden'); - errorClose.classList.add("hidden"); - } - - // Show the dialog - errorDialog.classList.remove("hidden"); -} - -export function reportCaughtError({error, cause, componentStack}) { - reportError({ title: "Caught Error", error, componentStack, dismissable: true}); -} - -export function reportUncaughtError({error, cause, componentStack}) { - reportError({ title: "Uncaught Error", error, componentStack, dismissable: false }); -} - -export function reportRecoverableError({error, cause, componentStack}) { - reportError({ title: "Recoverable Error", error, componentStack, dismissable: true }); -} -``` - -```js src/index.js active +```js [[1, 6, "onCaughtError"], [2, 6, "error", 1], [3, 6, "errorInfo"], [4, 10, "componentStack", 15]] import { createRoot } from "react-dom/client"; -import App from "./App.js"; -import {reportUncaughtError} from "./reportError"; -import "./styles.css"; +import { reportCaughtError } from "./reportError"; const container = document.getElementById("root"); const root = createRoot(container, { - onUncaughtError: (error, errorInfo) => { - if (error.message !== 'Known error') { - reportUncaughtError({ + onCaughtError: (error, errorInfo) => { + if (error.message !== "Known error") { + reportCaughtError({ error, - componentStack: errorInfo.componentStack + componentStack: errorInfo.componentStack, }); } - } + }, }); -root.render(); -``` - -```js src/App.js -import { useState } from 'react'; - -export default function App() { - const [throwError, setThrowError] = useState(false); - - if (throwError) { - foo.bar = 'baz'; - } - - return ( -
- This error shows the error dialog: - -
- ); -} -``` - - - - -### Displaying Error Boundary errors {/*displaying-error-boundary-errors*/} - -By default, React will log all errors caught by an Error Boundary to `console.error`. To override this behavior, you can provide the optional `onCaughtError` root option to handle errors caught by an [Error Boundary](/reference/react/Component#catching-rendering-errors-with-an-error-boundary): - -```js [[1, 6, "onCaughtError"], [2, 6, "error", 1], [3, 6, "errorInfo"], [4, 10, "componentStack"]] -import { createRoot } from 'react-dom/client'; - -const root = createRoot( - document.getElementById('root'), - { - onCaughtError: (error, errorInfo) => { - console.error( - 'Caught error', - error, - errorInfo.componentStack - ); - } - } -); -root.render(); ``` The onCaughtError option is a function called with two arguments: -1. The error that was caught by the boundary. +1. The error that was thrown. 2. An errorInfo object that contains the componentStack of the error. -You can use the `onCaughtError` root option to display error dialogs or filter known errors from logging: +Together with `onUncaughtError` and `onRecoverableError`, you can can implement your own error reporting system: -```html public/index.html hidden - - - - My app - - - - - -
- - -``` - -```css src/styles.css active -label, button { display: block; margin-bottom: 20px; } -html, body { min-height: 300px; } - -#error-dialog { - position: absolute; - top: 0; - right: 0; - bottom: 0; - left: 0; - background-color: white; - padding: 15px; - opacity: 0.9; - text-wrap: wrap; - overflow: scroll; -} - -.text-red { - color: red; -} - -.-mb-20 { - margin-bottom: -20px; +```js src/reportError.js +function reportError({ type, error, errorInfo }) { + // The specific implementation is up to you. + // `console.error()` is only used for demonstration purposes. + console.error(type, error, "Component Stack: "); + console.error("Component Stack: ", errorInfo.componentStack); } -.mb-0 { - margin-bottom: 0; -} - -.mb-10 { - margin-bottom: 10px; -} - -pre { - text-wrap: wrap; -} - -pre.nowrap { - text-wrap: nowrap; -} - -.hidden { - display: none; -} -``` - -```js src/reportError.js hidden -function reportError({ title, error, componentStack, dismissable }) { - const errorDialog = document.getElementById("error-dialog"); - const errorTitle = document.getElementById("error-title"); - const errorMessage = document.getElementById("error-message"); - const errorBody = document.getElementById("error-body"); - const errorComponentStack = document.getElementById("error-component-stack"); - const errorStack = document.getElementById("error-stack"); - const errorClose = document.getElementById("error-close"); - const errorCause = document.getElementById("error-cause"); - const errorCauseMessage = document.getElementById("error-cause-message"); - const errorCauseStack = document.getElementById("error-cause-stack"); - const errorNotDismissible = document.getElementById("error-not-dismissible"); - - // Set the title - errorTitle.innerText = title; - - // Display error message and body - const [heading, body] = error.message.split(/\n(.*)/s); - errorMessage.innerText = heading; - if (body) { - errorBody.innerText = body; - } else { - errorBody.innerText = ''; - } - - // Display component stack - errorComponentStack.innerText = componentStack; - - // Display the call stack - // Since we already displayed the message, strip it, and the first Error: line. - errorStack.innerText = error.stack.replace(error.message, '').split(/\n(.*)/s)[1]; - - // Display the cause, if available - if (error.cause) { - errorCauseMessage.innerText = error.cause.message; - errorCauseStack.innerText = error.cause.stack; - errorCause.classList.remove('hidden'); - } else { - errorCause.classList.add('hidden'); +export function onCaughtErrorProd(error, errorInfo) { + if (error.message !== "Known error") { + reportError({ type: "Caught", error, errorInfo }); } - // Display the close button, if dismissible - if (dismissable) { - errorNotDismissible.classList.add('hidden'); - errorClose.classList.remove("hidden"); - } else { - errorNotDismissible.classList.remove('hidden'); - errorClose.classList.add("hidden"); - } - - // Show the dialog - errorDialog.classList.remove("hidden"); } -export function reportCaughtError({error, cause, componentStack}) { - reportError({ title: "Caught Error", error, componentStack, dismissable: true}); +export function onUncaughtErrorProd(error, errorInfo) { + reportError({ type: "Uncaught", error, errorInfo }); } -export function reportUncaughtError({error, cause, componentStack}) { - reportError({ title: "Uncaught Error", error, componentStack, dismissable: false }); -} - -export function reportRecoverableError({error, cause, componentStack}) { - reportError({ title: "Recoverable Error", error, componentStack, dismissable: true }); +export function onRecoverableErrorProd(error, errorInfo) { + reportError({ type: "Recoverable", error, errorInfo }); } ``` ```js src/index.js active import { createRoot } from "react-dom/client"; import App from "./App.js"; -import {reportCaughtError} from "./reportError"; -import "./styles.css"; +import { + onCaughtErrorProd, + onRecoverableErrorProd, + onUncaughtErrorProd, +} from "./reportError"; const container = document.getElementById("root"); const root = createRoot(container, { - onCaughtError: (error, errorInfo) => { - if (error.message !== 'Known error') { - reportCaughtError({ - error, - componentStack: errorInfo.componentStack, - }); - } - } + // Keep in mind to remove these options in development to leverage + // React's default handlers or implement your own overlay for development. + // The handlers are only specfied unconditionally here for demonstration purposes. + onCaughtError: onCaughtErrorProd, + onRecoverableError: onRecoverableErrorProd, + onUncaughtError: onUncaughtErrorProd, }); root.render(); ``` ```js src/App.js -import { useState } from 'react'; -import { ErrorBoundary } from "react-error-boundary"; - -export default function App() { - const [error, setError] = useState(null); - - function handleUnknown() { - setError("unknown"); - } +import { Component, useState } from "react"; - function handleKnown() { - setError("known"); - } - - return ( - <> - { - setError(null); - }} - > - {error != null && } - This error will not show the error dialog: - - This error will show the error dialog: - - - - - ); +function Boom() { + foo.bar = "baz"; } -function fallbackRender({ resetErrorBoundary }) { - return ( -
-

Error Boundary

-

Something went wrong.

- -
- ); -} +class ErrorBoundary extends Component { + state = { hasError: false }; -function Throw({error}) { - if (error === "known") { - throw new Error('Known error') - } else { - foo.bar = 'baz'; + static getDerivedStateFromError(error) { + return { hasError: true }; } -} -``` - -```json package.json hidden -{ - "dependencies": { - "react": "19.0.0-rc-3edc000d-20240926", - "react-dom": "19.0.0-rc-3edc000d-20240926", - "react-scripts": "^5.0.0", - "react-error-boundary": "4.0.3" - }, - "main": "/index.js" -} -``` - - - -### Displaying a dialog for recoverable errors {/*displaying-a-dialog-for-recoverable-errors*/} - -React may automatically render a component a second time to attempt to recover from an error thrown in render. If successful, React will log a recoverable error to the console to notify the developer. To override this behavior, you can provide the optional `onRecoverableError` root option: - -```js [[1, 6, "onRecoverableError"], [2, 6, "error", 1], [3, 10, "error.cause"], [4, 6, "errorInfo"], [5, 11, "componentStack"]] -import { createRoot } from 'react-dom/client'; -const root = createRoot( - document.getElementById('root'), - { - onRecoverableError: (error, errorInfo) => { - console.error( - 'Recoverable error', - error, - error.cause, - errorInfo.componentStack, - ); + render() { + if (this.state.hasError) { + return

Something went wrong.

; } + return this.props.children; } -); -root.render(); -``` - -The onRecoverableError option is a function called with two arguments: - -1. The error that React throws. Some errors may include the original cause as error.cause. -2. An errorInfo object that contains the componentStack of the error. - -You can use the `onRecoverableError` root option to display error dialogs: - - - -```html public/index.html hidden - - - - My app - - - - - -
- - -``` - -```css src/styles.css active -label, button { display: block; margin-bottom: 20px; } -html, body { min-height: 300px; } - -#error-dialog { - position: absolute; - top: 0; - right: 0; - bottom: 0; - left: 0; - background-color: white; - padding: 15px; - opacity: 0.9; - text-wrap: wrap; - overflow: scroll; } -.text-red { - color: red; -} - -.-mb-20 { - margin-bottom: -20px; -} - -.mb-0 { - margin-bottom: 0; -} - -.mb-10 { - margin-bottom: 10px; -} - -pre { - text-wrap: wrap; -} - -pre.nowrap { - text-wrap: nowrap; -} - -.hidden { - display: none; -} -``` - -```js src/reportError.js hidden -function reportError({ title, error, componentStack, dismissable }) { - const errorDialog = document.getElementById("error-dialog"); - const errorTitle = document.getElementById("error-title"); - const errorMessage = document.getElementById("error-message"); - const errorBody = document.getElementById("error-body"); - const errorComponentStack = document.getElementById("error-component-stack"); - const errorStack = document.getElementById("error-stack"); - const errorClose = document.getElementById("error-close"); - const errorCause = document.getElementById("error-cause"); - const errorCauseMessage = document.getElementById("error-cause-message"); - const errorCauseStack = document.getElementById("error-cause-stack"); - const errorNotDismissible = document.getElementById("error-not-dismissible"); - - // Set the title - errorTitle.innerText = title; - - // Display error message and body - const [heading, body] = error.message.split(/\n(.*)/s); - errorMessage.innerText = heading; - if (body) { - errorBody.innerText = body; - } else { - errorBody.innerText = ''; - } - - // Display component stack - errorComponentStack.innerText = componentStack; - - // Display the call stack - // Since we already displayed the message, strip it, and the first Error: line. - errorStack.innerText = error.stack.replace(error.message, '').split(/\n(.*)/s)[1]; - - // Display the cause, if available - if (error.cause) { - errorCauseMessage.innerText = error.cause.message; - errorCauseStack.innerText = error.cause.stack; - errorCause.classList.remove('hidden'); - } else { - errorCause.classList.add('hidden'); - } - // Display the close button, if dismissible - if (dismissable) { - errorNotDismissible.classList.add('hidden'); - errorClose.classList.remove("hidden"); - } else { - errorNotDismissible.classList.remove('hidden'); - errorClose.classList.add("hidden"); - } - - // Show the dialog - errorDialog.classList.remove("hidden"); -} - -export function reportCaughtError({error, cause, componentStack}) { - reportError({ title: "Caught Error", error, componentStack, dismissable: true}); -} - -export function reportUncaughtError({error, cause, componentStack}) { - reportError({ title: "Uncaught Error", error, componentStack, dismissable: false }); -} - -export function reportRecoverableError({error, cause, componentStack}) { - reportError({ title: "Recoverable Error", error, componentStack, dismissable: true }); -} -``` - -```js src/index.js active -import { createRoot } from "react-dom/client"; -import App from "./App.js"; -import {reportRecoverableError} from "./reportError"; -import "./styles.css"; - -const container = document.getElementById("root"); -const root = createRoot(container, { - onRecoverableError: (error, errorInfo) => { - reportRecoverableError({ - error, - cause: error.cause, - componentStack: errorInfo.componentStack, - }); - } -}); -root.render(); -``` - -```js src/App.js -import { useState } from 'react'; -import { ErrorBoundary } from "react-error-boundary"; - -// 🚩 Bug: Never do this. This will force an error. -let errorThrown = false; export default function App() { + const [triggerUncaughtError, settriggerUncaughtError] = useState(false); + const [triggerCaughtError, setTriggerCaughtError] = useState(false); + return ( <> - - {!errorThrown && } -

This component threw an error, but recovered during a second render.

-

Since it recovered, no Error Boundary was shown, but onRecoverableError was used to show an error dialog.

- - + + {triggerUncaughtError && } + + {triggerCaughtError && ( + + + + )} ); } - -function fallbackRender() { - return ( -
-

Error Boundary

-

Something went wrong.

-
- ); -} - -function Throw({error}) { - // Simulate an external value changing during concurrent render. - errorThrown = true; - foo.bar = 'baz'; -} -``` - -```json package.json hidden -{ - "dependencies": { - "react": "19.0.0-rc-3edc000d-20240926", - "react-dom": "19.0.0-rc-3edc000d-20240926", - "react-scripts": "^5.0.0", - "react-error-boundary": "4.0.3" - }, - "main": "/index.js" -} ``` +<<<<<<< HEAD --- ## Solución de problemas {/*troubleshooting*/} +======= +## Troubleshooting {/*troubleshooting*/} +>>>>>>> 49284218b1f5c94f930f8a9b305040dbe7d3dd48 ### He creado una raíz, pero no se muestra nada {/*ive-created-a-root-but-nothing-is-displayed*/} diff --git a/src/content/reference/react-dom/client/hydrateRoot.md b/src/content/reference/react-dom/client/hydrateRoot.md index 8cb98a038..35abce6ab 100644 --- a/src/content/reference/react-dom/client/hydrateRoot.md +++ b/src/content/reference/react-dom/client/hydrateRoot.md @@ -373,554 +373,124 @@ export default function App({counter}) { Es poco común llamar a [`root.render`](#root-render) en una raíz hidratada. Por lo general, lo que deberías hacer es [actualizar el estado](/reference/react/useState) dentro de uno de los componentes. -### Show a dialog for uncaught errors {/*show-a-dialog-for-uncaught-errors*/} +### Error logging in production {/*error-logging-in-production*/} -By default, React will log all uncaught errors to the console. To implement your own error reporting, you can provide the optional `onUncaughtError` root option: +By default, React will log all errors to the console. To implement your own error reporting, you can provide the optional error handler root options `onUncaughtError`, `onCaughtError` and `onRecoverableError`: -```js [[1, 7, "onUncaughtError"], [2, 7, "error", 1], [3, 7, "errorInfo"], [4, 11, "componentStack"]] -import { hydrateRoot } from 'react-dom/client'; +```js [[1, 6, "onCaughtError"], [2, 6, "error", 1], [3, 6, "errorInfo"], [4, 10, "componentStack", 15]] +import { hydrateRoot } from "react-dom/client"; +import { reportCaughtError } from "./reportError"; -const root = hydrateRoot( - document.getElementById('root'), - , - { - onUncaughtError: (error, errorInfo) => { - console.error( - 'Uncaught error', +const container = document.getElementById("root"); +const root = hydrateRoot(container, { + onCaughtError: (error, errorInfo) => { + if (error.message !== "Known error") { + reportCaughtError({ error, - errorInfo.componentStack - ); + componentStack: errorInfo.componentStack, + }); } - } -); -root.render(); + }, +}); ``` -The onUncaughtError option is a function called with two arguments: +The onCaughtError option is a function called with two arguments: 1. The error that was thrown. 2. An errorInfo object that contains the componentStack of the error. -You can use the `onUncaughtError` root option to display error dialogs: +Together with `onUncaughtError` and `onRecoverableError`, you can can implement your own error reporting system: -```html public/index.html hidden - - - - My app - - - - - -
This error shows the error dialog:
- - -``` - -```css src/styles.css active -label, button { display: block; margin-bottom: 20px; } -html, body { min-height: 300px; } - -#error-dialog { - position: absolute; - top: 0; - right: 0; - bottom: 0; - left: 0; - background-color: white; - padding: 15px; - opacity: 0.9; - text-wrap: wrap; - overflow: scroll; -} - -.text-red { - color: red; -} - -.-mb-20 { - margin-bottom: -20px; -} - -.mb-0 { - margin-bottom: 0; -} - -.mb-10 { - margin-bottom: 10px; +```js src/reportError.js +function reportError({ type, error, errorInfo }) { + // The specific implementation is up to you. + // `console.error()` is only used for demonstration purposes. + console.error(type, error, "Component Stack: "); + console.error("Component Stack: ", errorInfo.componentStack); } -pre { - text-wrap: wrap; -} - -pre.nowrap { - text-wrap: nowrap; -} - -.hidden { - display: none; -} -``` - -```js src/reportError.js hidden -function reportError({ title, error, componentStack, dismissable }) { - const errorDialog = document.getElementById("error-dialog"); - const errorTitle = document.getElementById("error-title"); - const errorMessage = document.getElementById("error-message"); - const errorBody = document.getElementById("error-body"); - const errorComponentStack = document.getElementById("error-component-stack"); - const errorStack = document.getElementById("error-stack"); - const errorClose = document.getElementById("error-close"); - const errorCause = document.getElementById("error-cause"); - const errorCauseMessage = document.getElementById("error-cause-message"); - const errorCauseStack = document.getElementById("error-cause-stack"); - const errorNotDismissible = document.getElementById("error-not-dismissible"); - - // Set the title - errorTitle.innerText = title; - - // Display error message and body - const [heading, body] = error.message.split(/\n(.*)/s); - errorMessage.innerText = heading; - if (body) { - errorBody.innerText = body; - } else { - errorBody.innerText = ''; - } - - // Display component stack - errorComponentStack.innerText = componentStack; - - // Display the call stack - // Since we already displayed the message, strip it, and the first Error: line. - errorStack.innerText = error.stack.replace(error.message, '').split(/\n(.*)/s)[1]; - - // Display the cause, if available - if (error.cause) { - errorCauseMessage.innerText = error.cause.message; - errorCauseStack.innerText = error.cause.stack; - errorCause.classList.remove('hidden'); - } else { - errorCause.classList.add('hidden'); - } - // Display the close button, if dismissible - if (dismissable) { - errorNotDismissible.classList.add('hidden'); - errorClose.classList.remove("hidden"); - } else { - errorNotDismissible.classList.remove('hidden'); - errorClose.classList.add("hidden"); +export function onCaughtErrorProd(error, errorInfo) { + if (error.message !== "Known error") { + reportError({ type: "Caught", error, errorInfo }); } - - // Show the dialog - errorDialog.classList.remove("hidden"); -} - -export function reportCaughtError({error, cause, componentStack}) { - reportError({ title: "Caught Error", error, componentStack, dismissable: true}); } -export function reportUncaughtError({error, cause, componentStack}) { - reportError({ title: "Uncaught Error", error, componentStack, dismissable: false }); +export function onUncaughtErrorProd(error, errorInfo) { + reportError({ type: "Uncaught", error, errorInfo }); } -export function reportRecoverableError({error, cause, componentStack}) { - reportError({ title: "Recoverable Error", error, componentStack, dismissable: true }); +export function onRecoverableErrorProd(error, errorInfo) { + reportError({ type: "Recoverable", error, errorInfo }); } ``` ```js src/index.js active import { hydrateRoot } from "react-dom/client"; import App from "./App.js"; -import {reportUncaughtError} from "./reportError"; -import "./styles.css"; -import {renderToString} from 'react-dom/server'; +import { + onCaughtErrorProd, + onRecoverableErrorProd, + onUncaughtErrorProd, +} from "./reportError"; const container = document.getElementById("root"); -const root = hydrateRoot(container, , { - onUncaughtError: (error, errorInfo) => { - if (error.message !== 'Known error') { - reportUncaughtError({ - error, - componentStack: errorInfo.componentStack - }); - } - } +hydrateRoot(container, , { + // Keep in mind to remove these options in development to leverage + // React's default handlers or implement your own overlay for development. + // The handlers are only specfied unconditionally here for demonstration purposes. + onCaughtError: onCaughtErrorProd, + onRecoverableError: onRecoverableErrorProd, + onUncaughtError: onUncaughtErrorProd, }); ``` ```js src/App.js -import { useState } from 'react'; - -export default function App() { - const [throwError, setThrowError] = useState(false); - - if (throwError) { - foo.bar = 'baz'; - } - - return ( -
- This error shows the error dialog: - -
- ); -} -``` - - - - -### Displaying Error Boundary errors {/*displaying-error-boundary-errors*/} - -By default, React will log all errors caught by an Error Boundary to `console.error`. To override this behavior, you can provide the optional `onCaughtError` root option for errors caught by an [Error Boundary](/reference/react/Component#catching-rendering-errors-with-an-error-boundary): - -```js [[1, 7, "onCaughtError"], [2, 7, "error", 1], [3, 7, "errorInfo"], [4, 11, "componentStack"]] -import { hydrateRoot } from 'react-dom/client'; - -const root = hydrateRoot( - document.getElementById('root'), - , - { - onCaughtError: (error, errorInfo) => { - console.error( - 'Caught error', - error, - errorInfo.componentStack - ); - } - } -); -root.render(); -``` - -The onCaughtError option is a function called with two arguments: - -1. The error that was caught by the boundary. -2. An errorInfo object that contains the componentStack of the error. - -You can use the `onCaughtError` root option to display error dialogs or filter known errors from logging: - - - -```html public/index.html hidden - - - - My app - - - - - -
This error will not show the error dialog:This error will show the error dialog:
- - -``` - -```css src/styles.css active -label, button { display: block; margin-bottom: 20px; } -html, body { min-height: 300px; } - -#error-dialog { - position: absolute; - top: 0; - right: 0; - bottom: 0; - left: 0; - background-color: white; - padding: 15px; - opacity: 0.9; - text-wrap: wrap; - overflow: scroll; -} - -.text-red { - color: red; -} - -.-mb-20 { - margin-bottom: -20px; -} - -.mb-0 { - margin-bottom: 0; -} - -.mb-10 { - margin-bottom: 10px; -} +import { Component, useState } from "react"; -pre { - text-wrap: wrap; +function Boom() { + foo.bar = "baz"; } -pre.nowrap { - text-wrap: nowrap; -} +class ErrorBoundary extends Component { + state = { hasError: false }; -.hidden { - display: none; -} -``` - -```js src/reportError.js hidden -function reportError({ title, error, componentStack, dismissable }) { - const errorDialog = document.getElementById("error-dialog"); - const errorTitle = document.getElementById("error-title"); - const errorMessage = document.getElementById("error-message"); - const errorBody = document.getElementById("error-body"); - const errorComponentStack = document.getElementById("error-component-stack"); - const errorStack = document.getElementById("error-stack"); - const errorClose = document.getElementById("error-close"); - const errorCause = document.getElementById("error-cause"); - const errorCauseMessage = document.getElementById("error-cause-message"); - const errorCauseStack = document.getElementById("error-cause-stack"); - const errorNotDismissible = document.getElementById("error-not-dismissible"); - - // Set the title - errorTitle.innerText = title; - - // Display error message and body - const [heading, body] = error.message.split(/\n(.*)/s); - errorMessage.innerText = heading; - if (body) { - errorBody.innerText = body; - } else { - errorBody.innerText = ''; - } - - // Display component stack - errorComponentStack.innerText = componentStack; - - // Display the call stack - // Since we already displayed the message, strip it, and the first Error: line. - errorStack.innerText = error.stack.replace(error.message, '').split(/\n(.*)/s)[1]; - - // Display the cause, if available - if (error.cause) { - errorCauseMessage.innerText = error.cause.message; - errorCauseStack.innerText = error.cause.stack; - errorCause.classList.remove('hidden'); - } else { - errorCause.classList.add('hidden'); - } - // Display the close button, if dismissible - if (dismissable) { - errorNotDismissible.classList.add('hidden'); - errorClose.classList.remove("hidden"); - } else { - errorNotDismissible.classList.remove('hidden'); - errorClose.classList.add("hidden"); + static getDerivedStateFromError(error) { + return { hasError: true }; } - - // Show the dialog - errorDialog.classList.remove("hidden"); -} - -export function reportCaughtError({error, cause, componentStack}) { - reportError({ title: "Caught Error", error, componentStack, dismissable: true}); -} -export function reportUncaughtError({error, cause, componentStack}) { - reportError({ title: "Uncaught Error", error, componentStack, dismissable: false }); -} - -export function reportRecoverableError({error, cause, componentStack}) { - reportError({ title: "Recoverable Error", error, componentStack, dismissable: true }); -} -``` - -```js src/index.js active -import { hydrateRoot } from "react-dom/client"; -import App from "./App.js"; -import {reportCaughtError} from "./reportError"; -import "./styles.css"; - -const container = document.getElementById("root"); -const root = hydrateRoot(container, , { - onCaughtError: (error, errorInfo) => { - if (error.message !== 'Known error') { - reportCaughtError({ - error, - componentStack: errorInfo.componentStack - }); + render() { + if (this.state.hasError) { + return

Something went wrong.

; } + return this.props.children; } -}); -``` - -```js src/App.js -import { useState } from 'react'; -import { ErrorBoundary } from "react-error-boundary"; +} export default function App() { - const [error, setError] = useState(null); - - function handleUnknown() { - setError("unknown"); - } + const [triggerUncaughtError, settriggerUncaughtError] = useState(false); + const [triggerCaughtError, setTriggerCaughtError] = useState(false); - function handleKnown() { - setError("known"); - } - return ( <> - { - setError(null); - }} - > - {error != null && } - This error will not show the error dialog: - - This error will show the error dialog: - - - + + {triggerUncaughtError && } + + {triggerCaughtError && ( + + + + )} ); } - -function fallbackRender({ resetErrorBoundary }) { - return ( -
-

Error Boundary

-

Something went wrong.

- -
- ); -} - -function Throw({error}) { - if (error === "known") { - throw new Error('Known error') - } else { - foo.bar = 'baz'; - } -} -``` - -```json package.json hidden -{ - "dependencies": { - "react": "19.0.0-rc-3edc000d-20240926", - "react-dom": "19.0.0-rc-3edc000d-20240926", - "react-scripts": "^5.0.0", - "react-error-boundary": "4.0.3" - }, - "main": "/index.js" -} -``` - - - -### Show a dialog for recoverable hydration mismatch errors {/*show-a-dialog-for-recoverable-hydration-mismatch-errors*/} - -When React encounters a hydration mismatch, it will automatically attempt to recover by rendering on the client. By default, React will log hydration mismatch errors to `console.error`. To override this behavior, you can provide the optional `onRecoverableError` root option: - -```js [[1, 7, "onRecoverableError"], [2, 7, "error", 1], [3, 11, "error.cause", 1], [4, 7, "errorInfo"], [5, 12, "componentStack"]] -import { hydrateRoot } from 'react-dom/client'; - -const root = hydrateRoot( - document.getElementById('root'), - , - { - onRecoverableError: (error, errorInfo) => { - console.error( - 'Caught error', - error, - error.cause, - errorInfo.componentStack - ); - } - } -); ``` -The onRecoverableError option is a function called with two arguments: - -1. The error React throws. Some errors may include the original cause as error.cause. -2. An errorInfo object that contains the componentStack of the error. - -You can use the `onRecoverableError` root option to display error dialogs for hydration mismatches: - - - ```html public/index.html hidden @@ -929,226 +499,12 @@ You can use the `onRecoverableError` root option to display error dialogs for hy - - -
Server
+
Server content before hydration.
``` - -```css src/styles.css active -label, button { display: block; margin-bottom: 20px; } -html, body { min-height: 300px; } - -#error-dialog { - position: absolute; - top: 0; - right: 0; - bottom: 0; - left: 0; - background-color: white; - padding: 15px; - opacity: 0.9; - text-wrap: wrap; - overflow: scroll; -} - -.text-red { - color: red; -} - -.-mb-20 { - margin-bottom: -20px; -} - -.mb-0 { - margin-bottom: 0; -} - -.mb-10 { - margin-bottom: 10px; -} - -pre { - text-wrap: wrap; -} - -pre.nowrap { - text-wrap: nowrap; -} - -.hidden { - display: none; -} -``` - -```js src/reportError.js hidden -function reportError({ title, error, componentStack, dismissable }) { - const errorDialog = document.getElementById("error-dialog"); - const errorTitle = document.getElementById("error-title"); - const errorMessage = document.getElementById("error-message"); - const errorBody = document.getElementById("error-body"); - const errorComponentStack = document.getElementById("error-component-stack"); - const errorStack = document.getElementById("error-stack"); - const errorClose = document.getElementById("error-close"); - const errorCause = document.getElementById("error-cause"); - const errorCauseMessage = document.getElementById("error-cause-message"); - const errorCauseStack = document.getElementById("error-cause-stack"); - const errorNotDismissible = document.getElementById("error-not-dismissible"); - - // Set the title - errorTitle.innerText = title; - - // Display error message and body - const [heading, body] = error.message.split(/\n(.*)/s); - errorMessage.innerText = heading; - if (body) { - errorBody.innerText = body; - } else { - errorBody.innerText = ''; - } - - // Display component stack - errorComponentStack.innerText = componentStack; - - // Display the call stack - // Since we already displayed the message, strip it, and the first Error: line. - errorStack.innerText = error.stack.replace(error.message, '').split(/\n(.*)/s)[1]; - - // Display the cause, if available - if (error.cause) { - errorCauseMessage.innerText = error.cause.message; - errorCauseStack.innerText = error.cause.stack; - errorCause.classList.remove('hidden'); - } else { - errorCause.classList.add('hidden'); - } - // Display the close button, if dismissible - if (dismissable) { - errorNotDismissible.classList.add('hidden'); - errorClose.classList.remove("hidden"); - } else { - errorNotDismissible.classList.remove('hidden'); - errorClose.classList.add("hidden"); - } - - // Show the dialog - errorDialog.classList.remove("hidden"); -} - -export function reportCaughtError({error, cause, componentStack}) { - reportError({ title: "Caught Error", error, componentStack, dismissable: true}); -} - -export function reportUncaughtError({error, cause, componentStack}) { - reportError({ title: "Uncaught Error", error, componentStack, dismissable: false }); -} - -export function reportRecoverableError({error, cause, componentStack}) { - reportError({ title: "Recoverable Error", error, componentStack, dismissable: true }); -} -``` - -```js src/index.js active -import { hydrateRoot } from "react-dom/client"; -import App from "./App.js"; -import {reportRecoverableError} from "./reportError"; -import "./styles.css"; - -const container = document.getElementById("root"); -const root = hydrateRoot(container, , { - onRecoverableError: (error, errorInfo) => { - reportRecoverableError({ - error, - cause: error.cause, - componentStack: errorInfo.componentStack - }); - } -}); -``` - -```js src/App.js -import { useState } from 'react'; -import { ErrorBoundary } from "react-error-boundary"; - -export default function App() { - const [error, setError] = useState(null); - - function handleUnknown() { - setError("unknown"); - } - - function handleKnown() { - setError("known"); - } - - return ( - {typeof window !== 'undefined' ? 'Client' : 'Server'} - ); -} - -function fallbackRender({ resetErrorBoundary }) { - return ( -
-

Error Boundary

-

Something went wrong.

- -
- ); -} - -function Throw({error}) { - if (error === "known") { - throw new Error('Known error') - } else { - foo.bar = 'baz'; - } -} -``` - -```json package.json hidden -{ - "dependencies": { - "react": "19.0.0-rc-3edc000d-20240926", - "react-dom": "19.0.0-rc-3edc000d-20240926", - "react-scripts": "^5.0.0", - "react-error-boundary": "4.0.3" - }, - "main": "/index.js" -} -``` - ## Troubleshooting {/*troubleshooting*/} diff --git a/src/content/reference/react-dom/static/prerender.md b/src/content/reference/react-dom/static/prerender.md index 198faea64..6450e4a34 100644 --- a/src/content/reference/react-dom/static/prerender.md +++ b/src/content/reference/react-dom/static/prerender.md @@ -230,7 +230,7 @@ async function renderToString() { bootstrapScripts: ['/main.js'] }); - const reader = stream.getReader(); + const reader = prelude.getReader(); let content = ''; while (true) { const {done, value} = await reader.read(); @@ -291,7 +291,7 @@ Suspense-enabled data fetching without the use of an opinionated framework is no ### My stream doesn't start until the entire app is rendered {/*my-stream-doesnt-start-until-the-entire-app-is-rendered*/} -The `prerender` response waits for the entire app to finish rendering, including waiting for all suspense boundaries to resolve, before resolving. It is designed for static site generation (SSG) ahead of time and does not support streaming more content as it loads. +The `prerender` response waits for the entire app to finish rendering, including waiting for all Suspense boundaries to resolve, before resolving. It is designed for static site generation (SSG) ahead of time and does not support streaming more content as it loads. To stream content as it loads, use a streaming server render API like [renderToReadableStream](/reference/react-dom/server/renderToReadableStream). \ No newline at end of file diff --git a/src/content/reference/react-dom/static/prerenderToNodeStream.md b/src/content/reference/react-dom/static/prerenderToNodeStream.md index 039987497..eb12f4b38 100644 --- a/src/content/reference/react-dom/static/prerenderToNodeStream.md +++ b/src/content/reference/react-dom/static/prerenderToNodeStream.md @@ -289,7 +289,7 @@ Suspense-enabled data fetching without the use of an opinionated framework is no ### My stream doesn't start until the entire app is rendered {/*my-stream-doesnt-start-until-the-entire-app-is-rendered*/} -The `prerenderToNodeStream` response waits for the entire app to finish rendering, including waiting for all suspense boundaries to resolve, before resolving. It is designed for static site generation (SSG) ahead of time and does not support streaming more content as it loads. +The `prerenderToNodeStream` response waits for the entire app to finish rendering, including waiting for all Suspense boundaries to resolve, before resolving. It is designed for static site generation (SSG) ahead of time and does not support streaming more content as it loads. To stream content as it loads, use a streaming server render API like [renderToPipeableStream](/reference/react-dom/server/renderToPipeableStream). diff --git a/src/content/reference/react/Component.md b/src/content/reference/react/Component.md index 20f26dd8d..ff32a0060 100644 --- a/src/content/reference/react/Component.md +++ b/src/content/reference/react/Component.md @@ -1273,7 +1273,11 @@ Por defecto, si tu aplicación lanza un error durante el renderizado, React elim Para implementar un componente de error boundary, debes proporcionar [`static getDerivedStateFromError`](#static-getderivedstatefromerror) que te permite actualizar el estado en respuesta a un error y mostrar un mensaje de error al usuario. También puedes implementar opcionalmente [`componentDidCatch`](#componentdidcatch) para agregar algo de lógica adicional, por ejemplo, para registrar el error en un servicio de análisis. -```js {7-10,12-19} + With [`captureOwnerStack`](/reference/react/captureOwnerStack) you can include the Owner Stack during development. + +```js {9-12,14-27} +import * as React from 'react'; + class ErrorBoundary extends React.Component { constructor(props) { super(props); @@ -1286,12 +1290,18 @@ class ErrorBoundary extends React.Component { } componentDidCatch(error, info) { - // Example "componentStack": - // in ComponentThatThrows (created by App) - // in ErrorBoundary (created by App) - // in div (created by App) - // in App - logErrorToMyService(error, info.componentStack); + logErrorToMyService( + error, + // Example "componentStack": + // in ComponentThatThrows (created by App) + // in ErrorBoundary (created by App) + // in div (created by App) + // in App + info.componentStack, + // Only available in react@canary. + // Warning: Owner Stack is not available in production. + React.captureOwnerStack(), + ); } render() { diff --git a/src/content/reference/react/captureOwnerStack.md b/src/content/reference/react/captureOwnerStack.md new file mode 100644 index 000000000..f8ed21a8c --- /dev/null +++ b/src/content/reference/react/captureOwnerStack.md @@ -0,0 +1,452 @@ +--- +title: captureOwnerStack +--- + + + +The `captureOwnerStack` API is currently only available in React's Canary and experimental channels. Learn more about [React's release channels here](/community/versioning-policy#all-release-channels). + + + + + +`captureOwnerStack` reads the current Owner Stack in development and returns it as a string if available. + +```js +const stack = captureOwnerStack(); +``` + + + + + +--- + +## Reference {/*reference*/} + +### `captureOwnerStack()` {/*captureownerstack*/} + +Call `captureOwnerStack` to get the current Owner Stack. + +```js {5,5} +import * as React from 'react'; + +function Component() { + if (process.env.NODE_ENV !== 'production') { + const ownerStack = React.captureOwnerStack(); + console.log(ownerStack); + } +} +``` + +#### Parameters {/*parameters*/} + +`captureOwnerStack` does not take any parameters. + +#### Returns {/*returns*/} + +`captureOwnerStack` returns `string | null`. + +Owner Stacks are available in +- Component render +- Effects (e.g. `useEffect`) +- React's event handlers (e.g. ` +
+ +
+ + + +``` + +```js src/errorOverlay.js + +export function onConsoleError({ consoleMessage, ownerStack }) { + const errorDialog = document.getElementById("error-dialog"); + const errorBody = document.getElementById("error-body"); + const errorOwnerStack = document.getElementById("error-owner-stack"); + + // Display console.error() message + errorBody.innerText = consoleMessage; + + // Display owner stack + errorOwnerStack.innerText = ownerStack; + + // Show the dialog + errorDialog.classList.remove("hidden"); +} +``` + +```js src/index.js active +import { captureOwnerStack } from "react"; +import { createRoot } from "react-dom/client"; +import App from './App'; +import { onConsoleError } from "./errorOverlay"; +import './styles.css'; + +const originalConsoleError = console.error; +console.error = function patchedConsoleError(...args) { + originalConsoleError.apply(console, args); + const ownerStack = captureOwnerStack(); + onConsoleError({ + // Keep in mind that in a real application, console.error can be + // called with multiple arguments which you should account for. + consoleMessage: args[0], + ownerStack, + }); +}; + +const container = document.getElementById("root"); +createRoot(container).render(); +``` + +```json package.json hidden +{ + "dependencies": { + "react": "canary", + "react-dom": "canary", + "react-scripts": "latest" + }, + "scripts": { + "start": "react-scripts start", + "build": "react-scripts build", + "test": "react-scripts test --env=jsdom", + "eject": "react-scripts eject" + } +} +``` + +```js src/App.js +function Component() { + return ; +} + +export default function App() { + return ; +} +``` + + + +## Troubleshooting {/*troubleshooting*/} + +### The Owner Stack is `null` {/*the-owner-stack-is-null*/} + +The call of `captureOwnerStack` happened outside of a React controlled function e.g. in a `setTimeout` callback, after a `fetch` call or in a custom DOM event handler. During render, Effects, React event handlers, and React error handlers (e.g. `hydrateRoot#options.onCaughtError`) Owner Stacks should be available. + +In the example below, clicking the button will log an empty Owner Stack because `captureOwnerStack` was called during a custom DOM event handler. The Owner Stack must be captured earlier e.g. by moving the call of `captureOwnerStack` into the Effect body. + + +```js +import {captureOwnerStack, useEffect} from 'react'; + +export default function App() { + useEffect(() => { + // Should call `captureOwnerStack` here. + function handleEvent() { + // Calling it in a custom DOM event handler is too late. + // The Owner Stack will be `null` at this point. + console.log('Owner Stack: ', captureOwnerStack()); + } + + document.addEventListener('click', handleEvent); + + return () => { + document.removeEventListener('click', handleEvent); + } + }) + + return ; +} +``` + +```json package.json hidden +{ + "dependencies": { + "react": "canary", + "react-dom": "canary", + "react-scripts": "latest" + }, + "scripts": { + "start": "react-scripts start", + "build": "react-scripts build", + "test": "react-scripts test --env=jsdom", + "eject": "react-scripts eject" + } +} +``` + + + +### `captureOwnerStack` is not available {/*captureownerstack-is-not-available*/} + +`captureOwnerStack` is only exported in development builds. It will be `undefined` in production builds. If `captureOwnerStack` is used in files that are bundled for production and development, you should conditionally access it from a namespace import. + +```js +// Don't use named imports of `captureOwnerStack` in files that are bundled for development and production. +import {captureOwnerStack} from 'react'; +// Use a namespace import instead and access `captureOwnerStack` conditionally. +import * as React from 'react'; + +if (process.env.NODE_ENV !== 'production') { + const ownerStack = React.captureOwnerStack(); + console.log('Owner Stack', ownerStack); +} +``` diff --git a/src/content/reference/react/useActionState.md b/src/content/reference/react/useActionState.md index a6905cec2..f83f6bdc7 100644 --- a/src/content/reference/react/useActionState.md +++ b/src/content/reference/react/useActionState.md @@ -68,7 +68,7 @@ If used with a Server Function, `useActionState` allows the server's response fr `useActionState` returns an array with the following values: 1. The current state. During the first render, it will match the `initialState` you have passed. After the action is invoked, it will match the value returned by the action. -2. A new action that you can pass as the `action` prop to your `form` component or `formAction` prop to any `button` component within the form. +2. A new action that you can pass as the `action` prop to your `form` component or `formAction` prop to any `button` component within the form. The action can also be called manually within [`startTransition`](/reference/react/startTransition). 3. The `isPending` flag that tells you whether there is a pending Transition. #### Caveats {/*caveats*/} @@ -102,8 +102,8 @@ function MyComponent() { `useActionState` returns an array with the following items: 1. The current state of the form, which is initially set to the initial state you provided, and after the form is submitted is set to the return value of the action you provided. -2. A new action that you pass to `
` as its `action` prop. -3. A pending state that you can utilise whilst your action is processing. +2. A new action that you pass to `` as its `action` prop or call manually within `startTransition`. +3. A pending state that you can utilise while your action is processing. When the form is submitted, the action function that you provided will be called. Its return value will become the new current state of the form. diff --git a/src/content/reference/react/useEffect.md b/src/content/reference/react/useEffect.md index 9f15894db..c65d4570e 100644 --- a/src/content/reference/react/useEffect.md +++ b/src/content/reference/react/useEffect.md @@ -23,7 +23,7 @@ useEffect(setup, dependencies?) Declara un efecto con `useEffect` en el nivel superior de tu componente: ```js -import { useEffect } from 'react'; +import { useState, useEffect } from 'react'; import { createConnection } from './chat.js'; function ChatRoom({ roomId }) { @@ -81,7 +81,7 @@ A veces, un componente puede necesitar permanecer conectado a la red, a alguna A Para [conectar tu componente a algún sistema externo,](/learn/synchronizing-with-effects) declara `useEffect` en el nivel superior de tu componente: ```js [[1, 8, "const connection = createConnection(serverUrl, roomId);"], [1, 9, "connection.connect();"], [2, 11, "connection.disconnect();"], [3, 13, "[serverUrl, roomId]"]] -import { useEffect } from 'react'; +import { useState, useEffect } from 'react'; import { createConnection } from './chat.js'; function ChatRoom({ roomId }) { diff --git a/src/content/reference/react/useImperativeHandle.md b/src/content/reference/react/useImperativeHandle.md index 99dbcb420..576ad0412 100644 --- a/src/content/reference/react/useImperativeHandle.md +++ b/src/content/reference/react/useImperativeHandle.md @@ -46,7 +46,11 @@ function MyInput({ ref }) { +<<<<<<< HEAD A partir de React 19, [`ref` está disponible como una prop.](/blog/2024/12/05/react-19#ref-as-a-prop) En React 18 y versiones anteriores, era necesario obtener la `ref` de [`forwardRef`.](/reference/react/forwardRef) +======= +Starting with React 19, [`ref` is available as a prop.](/blog/2024/12/05/react-19#ref-as-a-prop) In React 18 and earlier, it was necessary to get the `ref` from [`forwardRef`.](/reference/react/forwardRef) +>>>>>>> 49284218b1f5c94f930f8a9b305040dbe7d3dd48 diff --git a/src/sidebarLearn.json b/src/sidebarLearn.json index 6087eceef..e09a26348 100644 --- a/src/sidebarLearn.json +++ b/src/sidebarLearn.json @@ -25,13 +25,28 @@ "path": "/learn/installation", "routes": [ { +<<<<<<< HEAD "title": "Iniciar un nuevo proyecto de React", "path": "/learn/start-a-new-react-project" +======= + "title": "Creating a React App", + "path": "/learn/creating-a-react-app" + }, + { + "title": "Building a React Framework", + "path": "/learn/building-a-react-framework" +>>>>>>> 49284218b1f5c94f930f8a9b305040dbe7d3dd48 }, { "title": "Agregar React a un proyecto existente", "path": "/learn/add-react-to-an-existing-project" - }, + } + ] + }, + { + "title": "Setup", + "path": "/learn/setup", + "routes": [ { "title": "Configurar un editor", "path": "/learn/editor-setup" diff --git a/src/sidebarReference.json b/src/sidebarReference.json index a5f451ce9..6d673efde 100644 --- a/src/sidebarReference.json +++ b/src/sidebarReference.json @@ -147,6 +147,11 @@ "title": "experimental_taintUniqueValue", "path": "/reference/react/experimental_taintUniqueValue", "version": "canary" + }, + { + "title": "captureOwnerStack", + "path": "/reference/react/captureOwnerStack", + "version": "canary" } ] }, @@ -304,7 +309,6 @@ "title": "prerenderToNodeStream", "path": "/reference/react-dom/static/prerenderToNodeStream" } - ] }, { @@ -398,4 +402,4 @@ ] } ] -} \ No newline at end of file +} diff --git a/tsconfig.json b/tsconfig.json index 440b38510..9d72e01bc 100644 --- a/tsconfig.json +++ b/tsconfig.json @@ -22,12 +22,18 @@ "isolatedModules": true, "jsx": "preserve", "baseUrl": "src", - "incremental": true + "incremental": true, + "plugins": [ + { + "name": "next" + } + ] }, "include": [ "next-env.d.ts", "src/**/*.ts", - "src/**/*.tsx" + "src/**/*.tsx", + ".next/types/**/*.ts" ], "exclude": [ "node_modules" diff --git a/vercel.json b/vercel.json index e08fda745..fdd63f5bb 100644 --- a/vercel.json +++ b/vercel.json @@ -164,6 +164,11 @@ "destination": "https://legacy.reactjs.org/blog/2020/09/22/introducing-the-new-jsx-transform.html", "permanent": false }, + { + "source": "/link/cra", + "destination": "/blog/2025/02/14/sunsetting-create-react-app", + "permanent": false + }, { "source": "/warnings/version-mismatch", "destination": "/warnings/invalid-hook-call-warning#mismatching-versions-of-react-and-react-dom", @@ -224,6 +229,11 @@ "destination": "https://18.react.dev/reference/react-dom/server/renderToNodeStream", "permanent": true }, + { + "source": "/learn/start-a-new-react-project", + "destination": "/learn/creating-a-react-app", + "permanent": true + }, { "source": "/blog/2024/04/25/react-19", "destination": "/blog/2024/12/05/react-19", diff --git a/yarn.lock b/yarn.lock index 7c9f52f42..a118cbeda 100644 --- a/yarn.lock +++ b/yarn.lock @@ -2,153 +2,148 @@ # yarn lockfile v1 -"@algolia/autocomplete-core@1.9.3": - version "1.9.3" - resolved "https://registry.npmjs.org/@algolia/autocomplete-core/-/autocomplete-core-1.9.3.tgz" - integrity sha512-009HdfugtGCdC4JdXUbVJClA0q0zh24yyePn+KUGk3rP7j8FEe/m5Yo/z65gn6nP/cM39PxpzqKrL7A6fP6PPw== +"@algolia/autocomplete-core@1.17.9": + version "1.17.9" + resolved 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