Advanced Configuration | Create React App
You can adjust various development and production settings by setting environment variables in your shell or with .env. Note: You do not need to declare REACT_APP_ before the below variables as you would with custom environment variables. By default, Create React App will open the default system browser, favoring Chrome on macOS. Specify a browser to override this behavior, or set it to none to di
Running Tests | Create React App
Note: this feature is available with react-scripts@0.3.0 and higher. Read the migration guide to learn how to enable it in older projects! Create React App uses Jest as its test runner. To prepare for this integration, we did a major revamp of Jest so if you heard bad things about it years ago, give it another try. Jest is a Node-based runner. This means that the tests always run in a Node environ
Adding TypeScript | Create React App
Note: this feature is available with react-scripts@2.1.0 and higher. TypeScript is a typed superset of JavaScript that compiles to plain JavaScript. InstallationTo start a new Create React App project with TypeScript, you can run:
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