I have noticed that at Google Fonts they never use fantasy as fallback class in font-family. For all script and typical fantasy fonts, they use cursive.
I wonder if this is a hint that chrome does not support fantasy as fallback class? For that to be the case, fallback font-classes would have to be handled by the browser via implemented lists for typical serif, sans-serif etc. fonts. Alternatively, the browser could query the os for such lists?
What happens when the browser needs to fallback to say a serif font on the clients system? How will it get info on the installed serif fonts?
I haven't been able to find an aswer to this, so I hope that someone here might know about it. I know web safe fonts and all that are probably about to become things of the past, but they still have some relevance.