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Flow is a static type checker for your JavaScript code. It does a lot of work to make us more productive. Making us code faster, smarter, more confidently, and to a bigger scale.

Create React App already supports Flow by default. All we need to do is install Flow and create a .flowconfig file by running flow init.

yarn add --dev flow-bin
yarn run flow init

Flow will be run as part of create-react-app’s scripts.

Also, Flow and Babel are designed to work great together. It takes just a few steps to set them up together.

yarn add --dev babel-preset-flow
# or
npm install --save-dev babel-preset-flow

Then add flow to your Babel presets config.

  "presets": ["flow"]

Issue Analytics

  • State:closed
  • Created 5 years ago
  • Reactions:1
  • Comments:8 (4 by maintainers)

github_iconTop GitHub Comments

arthurbuhlcommented, Oct 13, 2018

Ok, seems like we don’t need flow here. Should I close this issue @emmawedekind @crysfel?

charlesjliucommented, Oct 11, 2018

I don’t think we wanted to introduce type checking to keep the barrier to entry for other contributors low.

That said, if we do want to add type checking … typescript >>> flow all day 🙃

Read more comments on GitHub >

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