I’d say it already looks like a button. To me, [-] comes off as basically ASCII art for a box with a minus sign in it, similar to the classic Windows progressi

I’d say it already looks like a button. To me, [-] comes off as basically ASCII art for a box with a minus sign in it, similar to the classic Windows progressive disclosure controls: https://docs.microsoft.com/en-us/windows/win32/uxguide/images/progressive-disclosure-controls-image16.png https://docs.microsoft.com/en-us/windows/win32/uxguide/image... And a rectangular outline and/or background is of course the basic visual element that indicates a button. The ASCII art look works well here, but that’s because HN has an intentionally lo-fi aesthetic. On an average site I’d say it should be changed to a real box. Not a plain unstyled <button>, since (depending on the platform) those stand out too much for a relatively unimportant UI element. But I think a styled one would work. I don’t have enough HTML experience to know what the issues are with layout.