| <!DOCTYPE html> | |
| <style> | |
| #a::first-letter { | |
| text-decoration: underline; | |
| } | |
| #b::first-letter { | |
| text-decoration: green double underline; | |
| } | |
| </style> | |
| <div id="a">The first letter should have an underline in experimental and stable.</div> | |
| <div id="b">The first letter should have a green double underline in experimental only.</div> |