Update - 25 Feb 2026

• Previous experimental support has been removed becuase it does achieve the goal we want
• We're collecting users feedback on css bundling to figure what should be the right behaviors for css bundling
• We recommend you to use vite@8(using rolldown underlying) for CSS related demands.

Currently the builtin CSS support is experimental and incomplete. Related feedback would be gathered in this issue to avoid noises spreading around.

To avoid having too much non-interect and stale issues, please commnet your requests on this issue.

Requested features

• [Feature Request]: CSS syntax lowering #4344
• [Feature Request]: Inject CSS into Bundle #3681
• [Feature Request]: [CSS] support reference assets via url #2921

Bugs

• [Bug]: Incorrect CSS output #4483
• [Bug]: CSS entrypoint always generates an empty js file #5085
• [Bug]: modulesTypes not applied in CSS files #6363

Konwn issues

• [Bug]: Useless empty JS file for CSS #4259

Regressions

• fix: align resolve extension order with esbuild #4277 disables a esbuild test that relies on native css support.