This is a test page for Haikon, my javascript library for parsing HVIF vector icon files. The github project project is here: haikon-js.
There is quite a nice article about the format here: 500 Byte Images. There is also a Wikipedia page.
I used this page for development and debugging. So it has its own in–page console; a section with example HVIF files rendered to svg in the browser, and an Inspector tool that looks a little bit like an editor, but it is just an inspector. The example icons on this page are the haikuos icons, they can be found at haiku-icons.
Since it doesn't really make sense to make one HTTP request for every tiny icon file, I have packed them together into a single .tar file, and I am using tinytar in the browser to unpack them.