I have a Webpack project that I currently test using Firefox 98. Since this is a small project, though, I can't spend hours testing every single feature on every browser (and although I can set up continuous integration to do that for me, I currently don't have the time to write all of the tests either).

caniuse links to I want to use, which allows you to see the percentages of users you can support with a given set of features. The problem is I've written quite a lot of code, and can't spend the time combing through all of the code I've written to check what browser features I've used either.

Is there a program or script, be it an npm package, website, Webpack plugin, or otherwise, that can automatically identify the minimum supported browser versions for every major browser? Given that the data for caniuse is public, I'd expect such a library to exist already, although I haven't been able to find anything from search on Google and npm.