We have been using ESLint for code quality checks, Prettier for formatting, and Flow for data types. In this recipe, we'll get these packages back to work, and we'll leave testing (Jest, plus more) for Chapter 10, Testing your Application. Doing this for two of our tools will be quite straightforward, but a tad more complex for the third.
Reinstalling your tools
How to do it...
With a fully manual installation, getting everything to work together will be quite difficult, but CRA already includes practically everything we need, so all you have to do is add some configuration details.