Is there an official list of supported browsers?

[jannisg]

The readme doesn't mention it and I could not find it in the official documentation site either.

The closest I could find was this comment on a GitHub issue that mentions that it should work provided one polyfills Map, Set and Symbol.

Context: My organisation still needs to support IE11 for a bit longer and we are currently evaluating atom-based state management libraries to move away from redux.

[dai-shi]

In terms of transpilation, our ESM build is for modern browsers, and our CJS build is traditional browsers.
But, I don't think we can list supported browsers only from it...
The comments in #48 still hold. It uses Map, Set, Symbol and WeakMap, which may not work on old browsers.
If IE11 support is a requirement, my suggestion is zustand, which is not atom based, though.

[jannisg]

Thanks for the reply :)

So far with the polyfills, jotai seems to work as expected though I have yet to test some of its patterns in IE (Provider, useHydrateAtom, etc) that make use of those newer features.

I guess the tricky bit will be staying up to date when jotai may introduce new requirements in minor versions that could break IE11, or would you release those types of changes as a new major version?

I'm guessing since IE11 is not supported they could just be minor bumps technically.

[dai-shi]

It's good to hear that the polyfills work.

And, yes, your assumption is correct. IE11 is not officially supported, minor bumps may break technically.

[jannisg]

Yep, fair enough :)

Just as an FYI, I think WeakSet would also need to be polyfilled, see:

jotai/src/utils/useHydrateAtoms.ts

Line 37 in b98f865

hydratedSet = new WeakSet()