There is no difference between TypeScript's and Flow's design goals. Flow using the same extension as regular JavaScript is just a dirty marketing trick. Micros

There is no difference between TypeScript's and Flow's design goals. Flow using the same extension as regular JavaScript is just a dirty marketing trick. Microsoft would be lynched for "embrace-extend-extinguish" if they did the same. But since its Facebook, its completely fine that they're trying to co-opt standards. No problem at all.