What is the alternative to getProfile and is it possible to get json api of public pages without creating an application?

Question

In contact with

https://vk.com/dev/users.get?params[user_ids]=scha...
From the link above there is an option that is actually needed, getting data through the search field via id and nickname
There are examples in the link but not the full version finished link.
It is also not clear what can be obtained without authorization of the application itself?
___
This link https://api.vk.com/method/users.get?user_id=210700...
works only by id if nickname does not work

Answer 1

To begin with, for JS, VKontakte has an official API and requests through it. Second, the users.get method only accepts screen_name in user_ids .