How to Underline Text in CSS and HTML: 2 Simple Ways
How to underline a text using CSS?
How do I control underlines and similar text decorations? - Web Tutorials - avajava.com
css-text-decor] What happens to the wavy & double lines when `text- decoration-thickness` is applied? · Issue #4134 · w3c/csswg-drafts · GitHub
Stefan Judis on Twitter: "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