google sign-in with angular2 and typescript - where to get gapi?

Question

I\'m trying to use google sign-in with angular2 by following this question: Google Sign-In for Websites and Angular 2 using Typescript

But I\'m getting an error:

Answer 1

Have you included the Google platform API script?

See this question for instructions on how to wait for the GAPI script to load before executing your code.