Features›Modes›All motion mouse (DECSET 1003)

All motion mouse (DECSET 1003)

Category: modes · Baseline: modern · Tags: DEC Private Modes, Xterm Extensions · Specification ↗

ESC [ ? 1003 h

DECSET 1003 enables all-motion mouse tracking — the terminal reports mouse movement events even when no button is pressed. The sequence is ESC [ ? 1003 h. This generates significantly more traffic than normal tracking (?1000) or button-event tracking (?1002), so applications should only enable it when hover effects are needed.

How this is testedautomated
Enable all-motion mouse (CSI ? 1003 h), check getMode("mouseTracking") returns true. Confirms the backend recognizes mode 1003.

The same probe runs against headless backends (via Termless) and real terminal apps (via a daemon launched in each terminal). This lets us distinguish parser correctness from rendering correctness.

Analysis2026-04-06

Supported by 11 of 12 terminals (92%). Not supported by: vt100.js. Part of the Modern TUI baseline. Notes: vt100.js: Not in VT100/VT220 — xterm extension.

Supported by 12 of 14 backends (86%)

Terminal Applications

Terminal	Version	Support	Notes
iTerm2	3.6.9	✓ yes	DECRPM: mode reset
Ghostty	1.3.1	✓ yes	DECRPM: mode reset
VS Code		✓ yes
Warp		✓ yes
Cursor		✓ yes
Terminal.app		✓ yes

Headless Backends

Parser correctness only — a ✓ means the parser accepts the sequence.

Backend	Version	Support	Notes
Alacritty	0.26.0	✓ yes
vterm	0.2.0	✓ yes
WezTerm	0.1.0-fork.5	✓ yes
xterm.js	5.5.0	✓ yes
Kitty	0.40.0	~ partial	All-motion mouse tracking not exposed via Python batch bridge
vt100.js	0.2.1	✗ no	Not in VT100/VT220 — xterm extension

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