[jexah]

I don't presume to be an expert on history (only entered the webdev domain in 2010), but didn't prototype come out at least a couple of years after jQuery?

[FroshKiller]

Prototype was released like a year before jQuery.

[jexah]

Absolutely my bad there. Thanks for the info! jQuery's popularity must have been phenomenal, because I hadn't heard of Prototype until maybe 2011.

[ioddly]

I think Rails used to include it as a default.