> You type the code, and get suggestions for all the properties and methods available, along with all the possible arguments you are supposed to pass. Only if

> You type the code, and get suggestions for all the properties and methods available, along with all the possible arguments you are supposed to pass. Only if the library itself is written in Typescript or the ambient definitions are perfect. Not necessarily a detractor from the language, but still a practical time sink given the current state of external typings. It's definitely getting better, but it's still quite far from a minimal nuisance.