[css-2025][css-text-decor-4] Add `text-decoration-thickness`, `text-underline-offset` properties and `from-font` value for `text-underline-position` to Safe to Release exceptions

[SebastianZ]

Splitting the discussion from #10687 for adding the text-decoration-thickness, text-underline-offset properties and from-font value for text-underline-position from CSS Text Decorations 4 to the Safe to Release pre-CR Exceptions section of the CSS Snapshot 2025.

Data to consider:

• Spec. status: WD (last published: 4 May 2022)
• Implemented in all major browsers since 2021 and earlier
• see also [css-env] Publish FPWD? #6729
• WPT: passing tests (experimental): Chrome: 228, Edge: 228, Firefox: 345, Safari: 179; interop between Chrome, Edge, and Firefox: 228 / 345 (66.1%)
• Open issues: on GitHub: 2, in spec.: 1

Summary: Widely implemented, low interoperability, few open issues

Sebastian

[css-meeting-bot]

The CSS Working Group just discussed [css-2025][css-text-decor-4] Add `text-decoration-thickness`, `text-underline-offset` properties and `from-font` value for `text-underline-position` to Safe to Release exceptions, and agreed to the following:

• RESOLVED: add `text-decoration-thickness`, `text-underline-offset` properties and `from-font` for `text-underline-position` to Safe to Release exceptions

The full IRC log of that discussion

<florian> SebastianZ: interop is not that high
<florian> SebastianZ: spec last published in May 2022
<florian> SebastianZ: implemeted in all major browsers, but with moderate interop (66%)
<florian> SebastianZ: only 2 issues on github, 1 in the spec
<florian> fantasai: look like fairly minor issues (spec bug, rounding question)
<florian> fantasai: not concerning from a spec perspective
<florian> RESOLVED: add `text-decoration-thickness`, `text-underline-offset` properties and `from-font` for `text-underline-position` to Safe to Release exceptions