How to customize windows?

Question

JavaScript

Hello. How to make it so that when a user logs in, if he enters gmail, then a window appears for entering a password for gmail, or if he enters yahoo, a yahoo window appears?
We need to display the corresponding window
Thanks in advance

Answer 1

It is enough to get the contents of the field and, through a regular expression, get the string after the @ symbol. But it is worth noting that not a single person in their right mind will enter a mail password on the left site.