css3-text-decor][css4-background] @pattern for defining filling and decoration patterns from Sebastian Zartner on 2012-09-24 (www-style@w3.org from September 2012)
CSS text-decoration family (not just for underlining links)
text-decoration | Codrops
CSS Text Decoration Module Level 3
Stefan Judis on X: "I can't wait for all these new text-decoration properties to be widely supported. It's still early stages, but broader support of properties to e.g. define the underline thickness
CSS text-decoration-color >> valid or not - Beaver Builder - Beaver Builder Community Forum
How to Set the Gap Between Text and Underlining using CSS ? - GeeksforGeeks
html - Is it possible to change to the underline height from when the developer uses `text-decoration: underline;` in CSS to create an underline? - Stack Overflow