ghostty/website/app/vt/bel/page.mdx
Mitchell Hashimoto f919380005 website: BEL
2023-10-06 11:25:00 -07:00

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import VTSequence from "@/components/VTSequence";
# Bell (BEL)
<VTSequence sequence="BEL" />
The purpose of the bell sequence is to raise the attention
of the user. Historically, this would [ring a physical bell](https://en.wikipedia.org/wiki/Bell_character). Today, many alternate behaviors are
acceptable:
- An audible sound can be played through the speakers
- Background or border of a window can visually flash
- The terminal window can come into focus or be put on top
- Application icon can bounce or otherwise draw attention
- A desktop notification can be shown
Normally, the bell behavior is configurable and can be disabled.
## BEL as an OSC Terminator
The `BEL` character is also a valid terminating character for
OSC sequences, although `ST` is preferred. If `BEL` is the
terminating character for an OSC sequence, any responses should
also terminate with the `BEL` character.[^1]
[^1]: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html