[css-text-decor-4] text-decoration-skip-spaces

[w07i]

Specification: https://drafts.csswg.org/css-text-decor-4/#text-decoration-skip-spaces-property
Feature: text-decoration-skip-spaces (CSS Text Decoration Level 4)

Summary
text-decoration-skip-spaces controls whether text decoration lines (underlines, overlines, line-throughs) are drawn over whitespace characters. The spec's initial value is start end (skip leading and trailing whitespace). Chrome is preparing to ship this property (Intent to Ship posted; tracking bug https://issues.chromium.org/issues/40862777).

Use cases
Authors commonly want to suppress the underline under leading/trailing spaces in inline elements (navigation menus, links) so the decoration visually attaches only to non-space characters. There is currently no web-standard way to control this.

Questions for Mozilla

1. Do you plan to implement text-decoration-skip-spaces?
2. If so, which initial value would you ship? The spec defines start end, while Firefox's current behavior is closer to end (per [css-text-decor-4] Variants of text-decoration-skip-spaces:end behavior, and initial value w3c/csswg-drafts#4653 — Firefox skips only overflowing preserved U+0020 at line endings under white-space: pre-wrap and does not skip leading spaces). Would you align with start end, ship end, or something else?