Double underline (SGR 21)

Category: sgr · Specification ↗

Supported by 4 of 6 backends (67%)

Support Matrix

Backend	Version	Support	Notes
Ghostty	1.3.1	✓ yes
Kitty	0.40.0	✓ yes
vt100	0.1.0	✓ yes
WezTerm	0.1.0-fork.5	✓ yes
Alacritty	0.26.0	✗ no	Alacritty only supports single underline in headless mode
xterm.js	5.5.0	✗ no	Headless mode treats all underline variants as single ↗ upstream

← Back to matrix · sgr features