Wraparound is only honored when typing at the end of the line. The line is not wrapped if characters are inserted at any other place.

FWIW, I had implemented a workaround for xterm 4.19, which relied on the private _dirtyRowService.

Details

• Browser and browser version: Chrome 108
• xterm.js version: 5.1.0 + fit addon 0.7.0

Steps to reproduce

1. Enable insert mode and wraparound mode
2. Type some characters
3. Move to the beginning of line
4. Type more characters
5. Observe that the line is not wrapped

terminal.write('2345678');
terminal.write('\x1b[7D');
terminal.write('1'.repeat(terminal.cols-1));