eslint v9 support

[ljharb]

(see also #2478, #2223, #2036, #1834, #1447)

eslint v9 was released on 2024.04.05.

The current plan is, if possible, to release a new semver-minor of both configs, that supports 7 || 8 || 9.

Note that this is different from whether flat config is supported or not by these plugins, and from whether this project will convert to flat config.

The timeframe for eslint v9 support is "not as soon as you would like, but as soon as we can".
Please accept this, and please add no noise to this thread beyond emoji reactions - distractions won't help anyone get the work done any faster.

Please do not file additional issues and do not file pull requests attempting to add support - please, instead, continue to use eslint v8 until such time as our configs support v9.

Peer Dep eslint combined v7, v8, and v9 support released:

• eslint-plugin-import (PR)
  • flat config support (PR)
• eslint-find-rules
• update the base config
• publish the base config, semver-minor
• eslint-plugin-react
  • flat config support
• eslint-plugin-jsx-a11y (PR)
  • flat config support
• eslint-plugin-react-hooks
  • v9 support (PR)
  • flat config support (PR)
• update the main config
• publish the main config, semver-minor

[Aluisio]

eslint-plugin-react-hooks stable version 5.0.0 has just been released 😃

[michaelfaith]

Really stoked to see that! It doesn't, however provide flat config support. So, still a bit more there needed.

[efoken]

But @michaelfaith, I am not sure if flat config support is actually needed for eslint-plugin-react-hooks!? Because it only contains 2 rules and the plugin and these things are manually set in Airbnb config without an import or something, so I don't see any need for flat config support.

[ljharb]

If we want to expose a flat config, then we’d need it to have one too.

[michaelfaith]

Ah, that's a fair point. If the config isn't used, then that wouldn't be a blocker.

[michaelfaith]

If we want to expose a flat config, then we’d need it to have one too.

Looks like we hit submit at the same time? haha I think it'd actually be possible without their own flat config, unless I'm missing something. Looking at how this library is using the react-hooks plugin, it's only using the rules directly, rather than extending one of its configs. So mapping that same thing to a flat config wouldn't require them to actually have a flat config of their own; just v9 / flat config compatible rules.