If you’re getting errors from installing yarn, you may want to run sudo apt remove cmdtest first. A React package with necessary development dependencies and @types installed. Builds the app for production to the build folder. To create a new app, you may choose one of the following methods: npm init is available in npm 6+. yarn build to create a production deployment. Or if you have the optional Yarn package manager installed. Advanced. Workspaces Split your project into sub-components kept within a single repository. Let’s run the following commands: We can quickly check that the various environments of our application are working properly: Our three frontend app modalities: automated test (Jest), component development (Storybook), and the app itself. CLI. text above to "Hello, world!" If you want to customize eslint you can add an eslint block to your package.json, or you can run yarn lint --write-file and edit the generated .eslintrc.js file. We’ll need to follow a few steps to get the build process set up in your environment. If you don’t experience the problems described above or don’t feel comfortable using JavaScript tools yet, consider adding React as a plain