CSS Inline text-box, text-box-trim, and text-box-edge properties

[kojiishi]

こんにちは TAG-さん!

I'm requesting a TAG review of CSS Inline text-box, text-box-trim, and text-box-edge properties.

To achieve optical balance of text content, the text-box-trim and text-box-edge properties, along with the text-box shorthand property, make finer control of vertical alignment of text possible.

• Explainer¹: https://kojiishi.github.io/explainers/text-box-trim
• Specification: https://drafts.csswg.org/css-inline-3/#leading-trim
• WPT Tests: https://wpt.fyi/results/css/css-inline/text-box-trim?label=master&label=experimental&aligned
• User research:
• Security and Privacy self-review²:
• GitHub repo:
• Primary contacts:
  • @fantasai, Apple, spec editor.
  • @kojiishi, Google, Chromium implementor
  • @atanassov, Microsoft, CSS WG Chair
  • @astearns, Adobe, CSS WG Chair
• Organization/project driving the specification:
• Multi-stakeholder support³:
  • Chromium comments: Positive.
  • Mozilla comments: CSS text-box, text-box-trim, text-box-edge mozilla/standards-positions#1105
  • WebKit comments: CSS Inline text-box, text-box-trim, text-box-edge WebKit/standards-positions#432
  • Microsoft Design: Published an article.
  • Figma: Launched their implementation.
• Status/issue trackers for implementations⁴:
  • https://chromestatus.com/feature/5174589850648576, crbug.com/40254880, available as Experimental Web Platform features.
  • WebKit available under a runtime flag.

Further details:

• I have reviewed the TAG's Web Platform Design Principles
• Relevant time constraints or deadlines:
• The group where the work on this specification is currently being done: CSS WG
• The group where standardization of this work is intended to be done (if different from the current group):
• Major unresolved issues with or opposition to this specification:
• This work is being funded by: