Curly underline (SGR 4:3)

Category: sgr · Specification ↗

Supported by 5 of 6 backends (83%)

Support Matrix

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

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