This is a heavily interactive web application, and JavaScript is required. Simple HTML interfaces are possible, but that is not what this is.
Post
Firefox for Web Developers
webdevs.firefox.com
did:plc:6jsvyhtxrkb4d2wrlwd2avmm
We have Custom Elements, but do we also need Custom Attributes?
This was discussed at TPAC. Is it something you'd like on the platform?
https://github.com/WICG/webcomponents/issues/1029
2025-12-01T14:29:01.233Z