Features›Cursor›HPA horizontal position absolute (CSI `)

HPA horizontal position absolute (CSI `)

Category: cursor · Tags: ECMA-48 Standard · Specification ↗

CSI Ps `

HPA (Horizontal Position Absolute) moves the cursor to an absolute column on the current row. The sequence is CSI Ps ` where Ps is the 1-based column number (default 1). HPA is functionally equivalent to CHA (CSI G) but uses a different final character. Both are defined in ECMA-48 — some older terminals only implement one of the two.

How this is tested: Write "ABCDEFGH" then send \x1b[5` (HPA col 5), verify cursor column is 4 (0-based).

Analysis2026-04-06

Supported by 6 of 8 terminals (75%). Not supported by: vterm.js, vt100.js. Part of the Core TUI baseline. Notes: vterm.js: HPA (horizontal position absolute) not implemented in vterm.js; vt100.js: HPA (horizontal position absolute) not implemented in vt100.js baseline emulator.

Supported by 8 of 14 backends (57%)

Terminal Applications

Terminal	Version	Support	Notes
iTerm2	3.6.9	✓ yes
Ghostty	1.3.1	✓ yes
Kitty	0.46.2	✓ yes
VS Code	1.113.0	? unknown
Warp	0.2026.03.18.08.24.03	? unknown
Cursor	2.6.21	? unknown
Terminal.app	2.15	? unknown

Headless Backends

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

Backend	Version	Support	Notes
Alacritty	0.26.0	✓ yes
WezTerm	0.1.0-fork.5	✓ yes
xterm.js	5.5.0	✓ yes
vt100.js	0.2.1	✗ no	HPA (horizontal position absolute) not implemented in vt100.js baseline emulator
vterm	0.2.0	✗ no	HPA (horizontal position absolute) not implemented in vterm.js

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