How does the browser choose which font of generic family to use?

Question

I'm not really good at fonts, and I didn't quite catch this "font" and "generic" families-thing. If I understand it correctly, generic family is like a bunch of alike fonts. But how does the browser choose exactly which font to use?

Answer 1

browsers have their default fonts if no font is specified by the coder, it's up to you to know each browsers default