Some hotkeys unusable

[raspbeguy]

Describe the bug
Some hotkeys are not usable on some keyboard layouts, for instance ^] on french AZERTY keyboards.

To Reproduce
We will try to send the escape hotkey ^] (used by programs like telnet) using an french AZERTY keyboard.

1. Make sure telnet is installed
2. Run ttyd bash
3. Open the terminal in your browser at http://127.0.0.1:7681
4. Run telnet towel.blinkenlights.nl for instance.
5. Then try to enter the escape character ^] (knowing that on french AZERTY keyboards the character ] is typed with AltGR + ).

Nothing happens. It is the same issue with other programs than telnet, for example virsh console.

Expected behavior
You should get the telnet prompt telnet>

Environment:

• OS: Debian 11, Alpine Linux Edge
• Browser: Firefox 107.0, Chromium 108.0.5359.124

[tsl0922]

Can you reproduce it with with xterm.js demo?

[raspbeguy]

I don't know how to use that.

[tsl0922]

Check: https://github.com/xtermjs/xterm.js/wiki/Contributing#running-the-demo

[raspbeguy]

Yes I reproduced it on demo.

[tsl0922]

Then you may want to report this issue to the xterm.js repo, thanks.