To get the full benefit from TS you really need to have type definitions for all 3rd-party libraries you use. Libs that aren't written in TS generally don't provide them, and many of the community definitions maintained by DefinitelyTyped are badly out of date or incomplete, which in my mind is worse than having no definition at all.

Without defs you can get the compiler to stop complaining by turning off implicit any errors and creating definitions for just a few things like node's require and exports, but this felt like too much of a hack for me to really feel good about it.

If anyone has found solid solution to this problem please let me know. I love TypeScript but don't want to spend too much time futzing with definitions.