JavaScript API Vkontakte for authentication on the client. How?

Question

JavaScript

Has anyone used the Vkontakte JavaScript API for authentication without using the openapi.js library, and indeed without third-party libraries? With it, email cannot be pulled out, but through api it is somehow intricate, as it seems to me. Or maybe I think?)

Answer 1

With her email can not be pulled out

Because you don't need to know email.