Rounded corner box characters don't seem to be rendered correctly

[npezza93]

Rounded corner characters are rendered at kind of an angle and differently than the default macOS terminal or rendered in the browser. I have tried Fira code, jet brains mono, and sf mono fonts and all render the same way. I have also tried all variations of turning on and off canvas, webgl, and ligatures and all render the same way.

Details

• Browser and browser version: electron 19
• OS version: macOS Monterey
• xterm.js version: 4.18 and 4.19

Steps to reproduce

1. echo "╭─╮\n\r│ │\n\r╰─╯\n\r"

xterm:

default macOS terminal:

[Tyriar]

I agree it would look better like you suggest. You can change to the font rendering by setting customGlyphs to false, they won't be properly aligned then though.