![]() However, if you prefer the lint results to appear right in your editor, there are some extra steps you can do. You should see the linter output right in your terminal as well as the browser console. Some editors, including Sublime Text, Atom, and Visual Studio Code, provide plugins for ESLint. Note: this feature is available with and higher. Some of the most popular editors are covered. To configure the syntax highlighting in your favorite text editor, head to the relevant Babel documentation page and follow the instructions. If you use any other ES6+ features that need runtime support (such as om() or Symbol), make sure you are including the appropriate polyfills manually, or that the browsers you are targeting already support them. Note that the project only includes a few ES6 polyfills: While we recommend using experimental proposals with some caution, Facebook heavily uses these features in the product code, so we intend to provide codemods if any of these proposals change in the future. Learn more about different proposal stages. Class Fields and Static Properties (part of stage 3 proposal).Object Rest/Spread Properties (stage 3 proposal).In addition to ES6 syntax features, it also supports: This project supports a superset of the latest JavaScript standard. Supported Language Features and Polyfills However we understand that this tool wouldn’t be useful if you couldn’t customize it when you are ready for it. The curated feature set is suitable for small and middle deployments, and you shouldn’t feel obligated to use this feature. All of the commands except eject will still work, but they will point to the copied scripts so you can tweak them. Instead, it will copy all the configuration files and the transitive dependencies (Webpack, Babel, ESLint, etc) right into your project so you have full control over them. This command will remove the single build dependency from your project. If you aren’t satisfied with the build tool and configuration choices, you can eject at any time. See the section about deployment for more information. The build is minified and the filenames include the hashes. It correctly bundles React in production mode and optimizes the build for the best performance. npm run buildīuilds the app for production to the build folder. See the section about running tests for more information. Launches the test runner in the interactive watch mode. You will also see any lint errors in the console. In the project directory, you can run: npm start They will not be included in the production build so you can use them for things like documentation. You can, however, create more top-level directories. Read instructions below for using assets from JavaScript and HTML. Only files inside public can be used from public/index.html. You need to put any JS and CSS files inside src, otherwise Webpack won’t see them. ![]() For faster rebuilds, only files inside src are processed by Webpack. You may create subdirectories inside src. You can delete or rename the other files. src/index.js is the JavaScript entry point.public/index.html is the page template.Folder StructureĪfter creation, your project should look like this:įor the project to build, these files must exist with exact filenames: We commit to keeping the breaking changes minimal so you can upgrade react-scripts painlessly. In most cases bumping the react-scripts version in package.json and running npm install in this folder should be enough, but it’s good to consult the changelog for potential breaking changes. To update an existing project to a new version of react-scripts, open the changelog, find the version you’re currently on (check package.json in this folder if you’re not sure), and apply the migration instructions for the newer versions. When you run create-react-app, it always creates the project with the latest version of react-scripts so you’ll get all the new features and improvements in newly created apps automatically. You almost never need to update create-react-app itself: it delegates all the setup to react-scripts. ![]() react-scripts is a development dependency in the generated projects (including this one).create-react-app is a global command-line utility that you use to create new projects.Injecting Data from the Server into the PageĬreate React App is divided into two packages:."Invalid Host Header" Errors After Configuring Proxy.Adding Development Environment Variables In.Adding Temporary Environment Variables In Your Shell. ![]()
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