[karmakaze]

> could only recommend one

TypeScript since everyone ends up learning js anyway. Only need to be warned about the js warts and foot-guns in advance to be less tripped up or shocked by them.

It might be better for some to learn javascript first, then later transition to TypeScript after experiencing runtime errors to appreciate static types which avoids them.

Other languages that allow addition of static typing falls far short of the standard that TypeScript has achieved, both in it its type system and ecosystem.