fix(theme): ignored className attribute on lazy loaded TabItem

[lebalz]

Fixes #10218

Pre-flight checklist

• I have read the Contributing Guidelines on pull requests.
• If this is a code change: I have written unit tests and/or added dogfooding pages to fully verify the new behavior.
• If this is a new API or substantial change: the PR has an accompanying issue (closes #0000) and the maintainers have approved on my working plan.

Motivation

Test Plan

Test links

Deploy preview: https://deploy-preview-_____--docusaurus-2.netlify.app/

Related issues/PRs

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⚡️ Lighthouse report for the deploy preview of this PR

URL	Performance	Accessibility	Best Practices	SEO	PWA	Report
/	🟠 61	🟢 98	🟢 96	🟢 100	🟠 88	Report
/docs/installation	🟠 61	🟢 96	🟢 100	🟢 100	🟠 88	Report
/docs/category/getting-started	🟠 75	🟢 100	🟢 100	🟢 90	🟠 88	Report
/blog	🟠 70	🟢 100	🟢 100	🟢 90	🟠 88	Report
/blog/preparing-your-site-for-docusaurus-v3	🟠 62	🟢 96	🟢 100	🟢 100	🟠 88	Report
/blog/tags/release	🟠 70	🟢 100	🟢 100	🟢 90	🟠 88	Report
/blog/tags	🟠 74	🟢 100	🟢 100	🟢 90	🟠 88	Report

[slorber]

Thanks 👍

[slorber]

Doesn't seem to work

See repro using swizzle:

https://stackblitz.com/edit/github-ez2gpv?file=src%2Fpages%2Findex.tsx,src%2Fpages%2Findex.module.css,src%2Ftheme%2FTabs.tsx,src%2Ftheme%2Fstyles.module.css

[lebalz]

Doesn't seem to work

See repro using swizzle:

https://stackblitz.com/edit/github-ez2gpv?file=src%2Fpages%2Findex.tsx,src%2Fpages%2Findex.module.css,src%2Ftheme%2FTabs.tsx,src%2Ftheme%2Fstyles.module.css

Don't know how i messed up my setup that i had the impression it worked - sorry for the trouble.

With your hint, it now works, and i extended the dogfooding /pages/tabs-tests/ that shows the new behaviour:

https://deploy-preview-10219--docusaurus-2.netlify.app/tests/pages/tabs-tests/

[slorber]

Thanks 👍