How to update Flutter Web URL without updating state / reloading page

[Dev Account]

Hi,

I am building an application where I pass two URL parameters to a viewer widget. I would like to be able to update the PageNo=1 parameter in the URL of the browser when the user moves the scrollbar. Can anyone help point me in the right direction?

The closest I have gotten is 

import 'dart:html:';

window.location.href = window.location.href + '?afdad=$_counter';

This flashes in the browser URL but then it disappears again.

I am currently using GetX for my route management but I am open to changing that aspect.

Thanks in advance,

Zambet