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We currently do the same thing Jest does: no hooks, but we offer it as `npm run prettier`, and we also run the comparison on CI (so if the prettier output is different, the PR fails). This means the code is always checked in formatted, but people need to remember to run `npm run prettier` or CI will fail.

Interesting, thanks Dan.

I run it at pre-commit and in CI before approving a PR. Basically my thought is to trust my team to do it whatever way they want to, in the editor, manually, or as a commit hook; and then verify it on the backend before committing.

This is exactly right. First project I saw using this approach a couple years ago was Play Framework + scalariform.

I'm also curious about this. FWIW, I came across this post on adding Prettier as a pre-commit hook that might help others: https://medium.com/@brindelle/format-your-javascript-with-pr...