How to make a chat application for web similar to gmail popup? -

As you might have seen in Gmail, when you click on the bottom right corner of your screen, a small popup chat it happens. Interestingly, this popup remains open in one place and even when we go from one webpage to another, how can this be done? It does not seem that this is a different page. Is this a different page? Or is this a single page?

Thanks in advance :). It is hoped that these intermediaries did not stop my question. The last time I told them something that would be useful to me, they gave me a negative vote and stopped my question.

You should give jQuery a shot

There is a very lovely module which can be worth a try.