Demo for lit is not working (https://gridstackjs.com/demo/web-comp.html)

[navalamol]

Subject of the issue

Demo for gridstack with lit element is not working. Does it supports lit element. If yes, can demo be fixed.
Also, do we have any docs related to that

https://gridstackjs.com/demo/web-comp.html

Your environment

• version of gridstack.js - DON'T SAY LATEST as that doesn't mean anything a month/year from now.
• which browser/OS

Steps to reproduce

You MUST provide a working demo - keep it simple and avoid frameworks as that could have issues - you can use
https://jsfiddle.net/adumesny/jqhkry7g

Expected behavior

Tell us what should happen. If hard to describe, attach a video as well.