There is no real compile time step with respect to type checking. Flow (like Hack) analyzes and type checks in the background, realtime. For workflow, check ou

There is no real compile time step with respect to type checking. Flow (like Hack) analyzes and type checks in the background, realtime. For workflow, check out: http://flowtype.org/docs/getting-started.html#_ http://flowtype.org/docs/getting-started.html#_