How and when is super admin created, are registrations divided into user types?

Question

JavaScript

Actually here's what I was thinking. After all, each project / site should have a super admin, right? where does it all start? Who manages users, first of all, and their roles. First registration on the site? and automatically assign the super admin status to it?
I would be grateful for advice where to dig. Stuck with structure.
Three types of users.
Super-admin
Employees of the company with a personal account / desktop, divided by department.
Ordinary users with a personal account.
I would like the initial registration to be very fast and simple - without 25 questionnaire fields - email|password. Or through social media, it doesn't matter. The main thing at the registration stage is to divide them into conditional groups. Well, actually where to store the super admin.
Sorry for the stream of consciousness, and I understand that the question is eerily banal, but specifically stuck. Paper pen don't help(

Answer 1

EventListener for each thumbnail. The event handler will be a function that changes the informational text, rating information, changes the large image. The large image will be a div block with css background-image. as soon as you click on the thumbnail, the large image changes the background property.
The same with the text, only there will not be a css property, but a js function that changes the text. I know that in jQuery it's How to do it in pure js - I'm confused myself. innerHTML look, but there are some nuances and tricks. Next time, be specific. It would be rational to start doing something yourself, and if you don’t understand how to change the picture or text, ask.

Answer 2

about the role has already been answered in general.
GOING TO MAKE A KILLER VK/FB/INSTAGRAM
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DON'T KNOW WHEN TO CREATE SUPER-DUPER-ADMIN-ROOT
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THE PLAN FAILED

Answer 3

https://www.google.com/webhp?sourceid=chrome-insta...