Are there plans to update the babel-preset-solid plugin to support Babel 8?

[SampsonCrowley]

Really it should already be supported out of the box, no?

but installing gives the warning warn: incorrect peer dependency "@babel/core@8.0.1"

[ryux1]

The warning is expected with the current release; Babel 8 is not declared as supported yet.

babel-preset-solid currently declares @babel/core: ^7.0.0 as a peer dependency, and Solid's own development setup still tests against Babel 7.29. Babel's Babel 8 migration guide also notes that Babel 8 is ESM-only, requires a newer Node.js version, and does not officially support Babel 7 presets/plugins across the major-version boundary, even though some may happen to work.

I could not find a public Solid issue or PR committing to a Babel 8 timeline, so only the maintainers can answer the plans part. For now, the supported choice is to keep @babel/core on 7.x. You can override the peer range to experiment with Babel 8, but that only suppresses installation resolution; it does not make the combination supported.

Proper Babel 8 support would need the preset's test suite to pass against Babel 8 first, followed by widening the peer range (for example, to include ^8.0.0) and accounting for the Babel 8 ESM and Node.js requirements.