[Lay-quq]

What is the motivation for this pull request?

Allow valid HTML with uppercase or mixed-case style attributes to render on the server.

What is the current behavior?

renderToStaticMarkup(parse('<p STYLE="color: red">Hello</p>')) throws because style is left as a string. The attribute name is normalized, but style conversion only reads the original lowercase attributes.style.

What is the new behavior?

Convert the style value after its attribute name is normalized. Unit and SSR regressions cover style, STYLE, and StYlE; the uppercase/mixed-case cases fail on the original code.

Checklist:

• Conventional Commits
• Tests: 148 unit tests, 17 ESM tests, 16 integration tests; source statements, branches, functions, and lines remain 100% covered.
• Types: TypeScript and package type checks passed.

Build, ESLint, and package lint also passed. Chromium and WebKit each passed 146 tests. The Firefox suite could not start locally: its browser-session connection timed out before any tests ran.

AI disclosure: OpenAI Codex implemented the change and ran the checks; a separate AI agent independently reviewed the final patch.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (04dfdac) to head (6d72dba).

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #2452   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            4         4           
  Lines          144       145    +1     
  Branches        55        56    +1     
=========================================
+ Hits           144       145    +1     

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[remarkablemark]

LGTM!

[remarkablemark]

Released:

• chore(master): release 6.1.9 #2454 (comment)