[spawnia]

Importing the library injects about 900 KB of antd CSS into the page.
In jsdom, every getComputedStyle then matches all those rules, which makes the jest suites of consumers 2–3× slower.

The build now writes the CSS to esm/index.css and cjs/index.css.
Consumers import it once in their application entry, which tests never load:

import '@mll-lab/react-components/esm/index.css';

The Empty image no longer references a bundled JS file

antd's Empty styles use fill: url('#linearGradient-1').
rollup-plugin-styles resolved that fragment to a JS file of antd.
The injected CSS inlined it as data:application/javascript;base64,…, and extract mode emitted it as esm/assets/index-*.js.
url: false leaves the reference as written.
The only other url() is a data URI, which needs no processing.

For agents 🤖: both consumers pass on integration with 21.0.0-alpha.1, merge to publish 21.0.0

Checked locally: yarn build, then esm/index.css exists, esm/index.js and cjs/index.js contain neither [class^=mll-ant-] nor the style-inject createElement("style").
Storybook keeps loading src/antd.less through less-loader, unchanged.

Consumers on 21.0.0-alpha.1, deployed to their integration environments:

• limes-frontend without its jsdom workaround: 4922 jest tests green in 105 s on CI, as fast as with the workaround. A page with library components renders identically before and after, with no console errors; the end-to-end suite passes. The bundle carries the mll-ant rules once, before antd 3's own CSS.
• nemo: jest and types green. snowpack failed on antd's url('#linearGradient-1'), so nemo moves to Vite in the same merge request. A page with library components renders pixel-identical before and after.

Next: merge, semantic-release publishes 21.0.0 from the BREAKING CHANGE: footer.
Then switch both consumers from the alpha to 21.0.0 and merge them.

[Copilot]

🔵 Needs a closer look

The breaking CSS-distribution change requires style and Jest checks against a packed tarball in both consumers, but those merge prerequisites remain pending and cannot be verified from this repository snapshot.

No open issues 🎉

What changed in this PR

Replaces automatic CSS injection with separately shipped stylesheets, allowing consumers to keep library styles out of jsdom tests.

Changes:

• Extracts CSS to esm/index.css and cjs/index.css with stable filenames.
• Disables CSS URL processing to preserve antd’s gradient references.
• Documents the required stylesheet import in the application entry point.

File	Description
rollup.config.js	Configures CSS extraction, stable asset names, and preservation of CSS URLs.
README.md	Adds instructions for explicitly importing the stylesheet.

_{Review effort: Max}

[github-actions]

🎉 This PR is included in version 21.0.0-alpha.1 🎉

The release is available on:

• npm package (@alpha dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[github-actions]

🎉 This PR is included in version 21.0.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀