You can see a video preview here:
https://twitter.com/CodeGuppy/status/1435248017549012993<p>And you can see the JavaScript code in this playground:
https://codeguppy.com/code.html?win/win<p>(Press Play to run the code)
What would be a use case for it? <a href="https://www.os-js.org/" rel="nofollow">https://www.os-js.org/</a> is around for long time already. But, no wide usage yet...
Looks impressive -- do check out <a href="https://lively-next.org/" rel="nofollow">https://lively-next.org/</a> if you are not already familiar with it