React.js, wait for setState to finish before triggering a function?

`setState()` has an optional callback parameter that you can use for this. You only need to change your code slightly, to this:

    // Form Input

    this.setState(

      {

        originId: input.originId,

        destinationId: input.destinationId,

        radius: input.radius,

        search: input.search

      },

      this.findRoutes         // here is where you put the callback

    );

Notice the call to `findRoutes` is now inside the `setState()` call,

as the second parameter.  

Without `()` because you are passing the function.

GAME 2

GAME 3