feat(css): add baseline-source prop

[bsmth]

Description

Adds a reference page for baseline-source.

Motivation

This slipped through Fx release in 115.

Additional details

• https://bugzilla.mozilla.org/show_bug.cgi?id=1809568

Related issues and pull requests

• Update Firefox data for baseline-source CSS property browser-compat-data#20667
• Add baseline-source property browser-compat-data#18803

[github-actions]

Preview URLs

• /en-US/docs/Web/CSS/Guides/Inline_layout
• /en-US/docs/Web/CSS/Reference/Properties/baseline-source

Flaws (3)

URL: /en-US/docs/Web/CSS/Guides/Inline_layout
Title: CSS inline layout
Flaw count: 1

• macros:
  • Can't resolve /en-US/docs/Web/CSS/baseline-shift

---

URL: /en-US/docs/Web/CSS/Reference/Properties/baseline-source
Title: baseline-source
Flaw count: 2

• broken_links:
  • /en-US/docs/Web/CSS/CSS_values_and_units/Value_definition_syntax#single_bar is a redirect
  • /en-US/docs/Web/CSS/CSS_values_and_units/Value_definition_syntax#single_bar is a redirect

(comment last updated: 2025-12-05 13:24:26)

[estelle]

some feedback for your consideration

[bsmth]

Thanks, @estelle should be good for another look now 👀

[estelle]

values as DL
test suggestions to reduce congnitive load, which includes adding an
intro sentence to HTML

approving to not hold you up

[bsmth]

Thanks!