How do I make a prettierrc file that completely disables prettier?

I'm editing a repository that doesn't use Prettier, but my editor (Emacs) loads prettier-js-mode based on file extension. So when saving a file I get a bunch of whitespace changes that I can't commit as it would polute the upstream repository.

My idea so far is to add a local .prettierrc file that disables Prettier, then add it to my .git/config/exclude file so upstream doesn't have to know about it.

But how do I craft such a file?

In my case I'd like to have a file in the project's root directory that would disable Prettier for the whole project, but I can also see how others might wish for a way to do the same thing for a subdirectory.

Solution

What about adding the .prettierignore with a * in it?

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