Also, you can progressively opt in to add typing information, while still gettin...

whatever_dude · on Feb 22, 2017

The same can be done with TypeScript. Type inference has been added to it in 2015.

treehau5 · on Feb 22, 2017

Awesome, did not know this.

shados · on Feb 22, 2017

TypeScript type inference is minimal though and doesn't go very far. It falls back to "any" very quickly (and if you use the noImplicitAny option, then you have to type almost everything).

It does a decent enough job at return types, but not a whole lot beyond that.

whatever_dude · on Feb 22, 2017

Do you have a use case where something would be correctly inferred in Flow but not in TS?

dsp1234 · on Feb 22, 2017

The classic example is:

  function double(x) {
    return x * 2;
  }
  const result = double("foo");

Which passes in TS, but fails in Flow. In TS, the 'x' parameter to the double function is inferred as Any.