[atomiks]

This fixes a small batch of Form bugs found during review.

Changes

• Allow submit to continue when async field validation is still pending unless a field is already explicitly invalid.
• Make Form docs snippets safer by JSON-stringifying fetch bodies and null-checking actionsRef examples.

Original findings addressed

• [P2] Async validators could block the first valid submit.
• [P3] Public docs examples had copy-paste issues.

[pkg-pr-new]

• base-ui-tanstack-start

• vite-css-base-ui-example

  pnpm add https://pkg.pr.new/mui/base-ui/@base-ui/react@4894
  

  pnpm add https://pkg.pr.new/mui/base-ui/@base-ui/utils@4894
  

commit: c377cc6

[code-infra-dashboard]

Bundle size

Bundle	Parsed size	Gzip size
@base-ui/react	▼-8B(0.00%)	▼-7B(0.00%)

Details of bundle changes

Performance

Total duration: 1,364.92 ms +199.61 ms^(+17.1%) | Renders: 50 ⁽⁺⁰⁾ | Paint: 2,057.27 ms +307.90 ms^(+17.6%)

Test	Duration	Renders
Tabs mount (200 instances)	271.23 ms 🔺+58.60 ms(+27.6%)	4 (+0)
Slider mount (300 instances)	191.77 ms 🔺+35.78 ms(+22.9%)	3 (+0)
Tooltip mount (300 contained roots)	73.14 ms 🔺+31.11 ms(+74.0%)	1 (+0)
Dialog mount (300 instances)	61.15 ms 🔺+11.42 ms(+23.0%)	1 (+0)

8 tests within noise — details

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Check out the code infra dashboard for more information about this PR.

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