Dropdown menu in xml and java-script + svg - do you have an example?

Question

JavaScript

At one time, I bookmarked a link to an example of one script in java + xml.
A page on which an SVG circle was drawn in the middle, when clicked, a structure of nested circles with children was unfolded. When clicking on a child element, more daughters were expanded, and so on.
The entire structure of the daughters was described in an XML file and the script was processed by java-script. The picture was in text form, and was drawn in the form of SVG graphics.
Help who knows, to find such a script. Or recreate something like that.
I want to make a main page for my project, consisting of a page, a menu that consists of one button in the middle of the screen and when you click on it, subprojects on subdomains would unfold.

Answer 1

Elastic SVG circular menu
isn't it?