If something is missing in the documentation or if you found some part confusing, please file an issue for the documentation repository with your suggestions for improvement, or tweet at the @reactjs account. We love hearing from you!

If you are using create-react-app, You can run yarn build and it will create the production build in your build folder. just run index.html in a browser and it will run the website without any server.


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After that, we import reactLogo and viteLogo. Note that their import paths start with ./ and / respectively and that they end with the .svg extension at the end. This tells us that these imports are local, referencing our own files rather than npm packages.

Following is code for simplest webpage in React.js. If I write that in notepad and open it in web-browser as html doc, shouldn't it display "Hello World"? As opposed, browser displays nothing. Any other dependency is required for React.js to work?

Popular libraries like React and Vue have become such a one-size-fits-all solution that we don't even question them anymore. New to building literally anything on the Internet? Just run npx create-react-app and get going!

For those unfamiliar, hydration basically lets us write a dynamic, state-driven webpage, but also render as much of the page ahead-of-time as possible using static HTML. The Gatsby blog does a great job explaining this process, but here's a quick step-by-step:

I think Next.js is very good for this. Without almost any tooling you can just do next build && next export to generate the static site. And then you have the option to switch to dynamic by doing next build && next start. And for the dynamic version, if you are worried about React size you can just replace it to Preact (3kb with the same api).

Yeah, thanks for pointing that out! Next + Preact is a super powerful combo. I've heard some complaints about library support on Preact, but the community's still pretty robust at this point. Worth checking out!

Tools like 11ty do get you close to the same DX, and with some tuning, I'd argue you can get even better DX than you would with most react setups (throw a dash of Webpack/Parcel in there, some Typescript maybe, Preact.js or Svelte to keep the bundle size small if you really need something dynamic. )

Ohhh I wouldn't say that! I agree that Gatsby can be a bit heavy-handed for certain projects, but it strikes a neat balance between stateful clientside logic and static rendering. For that reason, I think it's basically a replacement for create-react-app for full-scale projects. It's also great for running your API calls ahead-of-time so you don't ship API keys to the client.

I had the same thought a while ago.. First thing that scared me off was the size of the node modules. Second was the build process - slow! Third was some react compatibility issue I encountered when installing the modules.

Awesome take on the subject and just what I needed. This gave me a better idea of when is worth using react for some client projects. I have been using Eleventy + nunjucks + netlify CMS for static sites for a while. You've inspired me to look into Pug now.

Typically, you request a webpage by typing its URL into your web browser. Your browser then sends a request for that webpage, which your browser renders. If you click a link on that webpage to go to another page on the website, a new request is sent to the server to get that new page.

This back-and-forth loading pattern between your browser (the client) and the server continues for every new page or resource you try to access on a website. This typical approach to loading websites works just fine, but consider a very data-driven website. The back and forth loading of the full webpage would be redundant and create a poor user experience.

Here we come to the community we talked about earlier and look for solutions in the many package extensions provided by NPM. React-responsive is one such package which is owned by Contra and has more than 50 contributors. This package allows you to declare various responsive media query big break points as variables that can be used with a layer of logic in your react components.

Overall, using react-responsive is a great way to create responsive React apps. It makes the process of creating responsive layouts much easier and provides a great way to customize the look of your app for different screen sizes.

The Auth0 React SDK (auth0-react.js) is a JavaScript library for implementing authentication and authorization in React apps with Auth0. It provides a custom React hook and other Higher Order Components so you can secure React apps using best practices while writing less code.

Note If you are using a custom router, you will need to supply the Auth0Provider with a custom onRedirectCallback method to perform the action that returns the user to the protected page. See examples for react-router, Gatsby and Next.js.

A single page application serves an app shell (empty HTML), which is then populated or rendered by JavaScript. All subsequent navigations only fetch relevant views and data while the app shell stays the same. A conventional website serves meaningful HTML content, which is then made interactive by JavaScript. All subsequent navigations load an entirely new webpage.

Meta tags are helpful because they allow Google and social media websites to show appropriate titles, thumbnails, and descriptions for pages. But these websites rely on the tag of the fetched webpage to get this information; they do not execute JavaScript for the target page.

A single-page application (SPA) is a website or web application that dynamically updates the contents of a displayed webpage by using JavaScript APIs. This approach enhances the user experience and performance of a website because it updates only new data instead of reloading the entire webpage from the server.

React Native for Web requires a package alias configuration that maps react-native to react-native-web, so when you import and use a React Native component from react-native in the web mode, the alias configuration renders the native-equivalent HTML component from react-native-web. On mobile, the React Native bundler picks native components from react-native.

Create React App (CRA) is the standard way to bootstrap web-only React applications. Although it comes with built-in support for aliasing react-native-web to react-native, it is still recommended to use Expo. However, we can bootstrap a React Native for Web application with CRA by following the steps below:

CRA and the official React Native CLI create Jest-runner-based unit tests for newly scaffolded projects. Also, you can add Jest-based unit tests to an Expo project in record time (see the official guide here). React Native uses the react-test-renderer package, and React uses @testing-library/react to run tests within the JavaScript environment without depending on the browser or mobile environments. So, your React Native tests will run properly even if you use React Native for Web via the react-native-web package.

However, there are popular third-party libraries that can be used to handle routing in React applications. One such library is react-router, which provides a comprehensive routing solution for React applications.[25] It allows you to define routes, manage navigation, and handle URL changes in a React-friendly way.

The webpage has become quite sophisticated. But what about managing relationships and inlined data? The create and update dialogs are not really suited for that. It might require some custom written forms.

Virtual DOM Components make it easy to share reusable things - everything from buttons to data providers. Preact's design means you can seamlessly use thousands of Components available in the React ecosystem.

\n Virtual DOM Components make it easy to share reusable things - everything from buttons to data providers.\n Preact's design means you can seamlessly use thousands of Components available in the React ecosystem.\n

Import BrowserRouter, Route, and Switch from react-router-dom. BrowserRouter will be the base configuration. Switch will wrap the dynamic routes and the Route component will configure specific routes and wrap the component that should render:

documentTitle will not work if react-to-print is running within an iframe. If react-to-print is running within an iframe and your script has access to the parent document, you may be able to manually set and then restore the parent document's title during the print. This can be done by leveraging the onBeforeGetContent and onAfterPrint props.

The connect method from react-redux returns a functional component that cannot be assigned a reference to be used within the content props' callback in react-to-print. To use a component wrapped in connect within content create an intermediate class component that simply renders your component wrapped in connect. See 280 for more. ff782bc1db

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