"Pop-up" type chat widget
Despite its name, it is not a pop-up window in the traditional sense. It does not generate individual browser windows. The widget is moved within the browser window the current page is opened in.
A consultant call button is embedded in the site pages. Pressing it opens the chat widget. The widget is dragged by its upper panel across the site page. To close the chat widget, press the close button (cross) in the upper panel. The widget is repeatedly opened also by pressing the button embedded in the site. Additionally, it opens automatically if a new message arrives from an operator.