Logbook ; Teachings of web development (I)

Abstract

I will write here what I learned from web development, and seal it in my memory in order to attempt the best to not forget it ever. Or if I do, come back here to re-learn it :)

I. Login

When doing a login site you have four (AFAIK) states.

1. You log-in correctly; (200)
2. You log-in incorrectly; (401)
3. A CORS error happens; (403)
4. Server is unavailable; (503)