He probably did not use it in a large project yet.
The benefits drown in the downsides:
- Write types for 3rd party APIs? Fun!
- You are lucky if you find type definitions for 2 out of 10 libs you use.
- The Polymorphic nature of javascript: you WILL add more loc to satisfy the type system.
- It does not replace the need for schemas. You will have to write validators for side-effects anyway and flow/ts will not understand them (yet).
- let and const came into flow not too long ago. Typescript does not have object-spread and is just about to get async funcs in a few weeks/months. So forget about your favorite ES7 feature.
- IDE's - not exciting. atom/nuclide is slow as hell and drove me nuts.
- 90% of all types are string or number.
The only real benefit is IDE auto completion. It did not find any serious errors. Mostly false positives because of polymorphism or incorrect definitions.
igl 3041 days ago. link 4 points ▲ ▼