What does HackerNews think of css-only-chat?
A truly monstrous async web chat using no JS whatsoever on the frontend
One guy on twitter (no longer available) used it for mouse tracking: overlay an invisible grid of squares on the page, each with a unique background image triggered on hover. Each background image sends a specific request to the server, which interprets it!
For fun one summer, I extended that idea to create a JS-free "css only async web chat": https://github.com/kkuchta/css-only-chat
1: https://github.com/kkuchta/css-only-chat 2: https://github.com/kkuchta/tabdb
You can use HTML, Canvas, and CSS to do just about everything you mentioned.
Video is easy. In pure HTML: . No Javascript (or even CSS) required. You can certainly expand on that as well.
Google Maps does not require Javascript to provide it's core and common functionality either: https://appelsiini.net/2008/google-maps-without-javascript/ You would have to make some changes, but core functionality still exists.
Github does not require Javascript to function. You can toggle JS off and still use it pretty much as is, and the features that do break are trivial to implement without it.
Interactive realtime chat does not require javascript. https://github.com/kkuchta/css-only-chat , and the same principals can be applied to online docs and editors as well.
Javascript is the norm because it has inertia behind it - largely due to circumstance more than any inherent natural benefit, not because it has some secret sauce that the internet needs that couldn't be easily replaced should it be Thanos-meets-Tron-Crossover Snapped out of existence.
A much stronger argument in favor of Javascript would not be pointing to all the good things you can do with it, but rather, with how well and optimized and streamlined doing those things with Javascript is these days. Just to clarify, I'm not saying Javascript is the problem, but rather, the abuse of it, and that abuse would still be an issue if other technologies replaced it one day.
I use the internet with JS toggled off by default as a result of the rampant abuse of dark patterns (for example, the Google Search Suggested Alternatives box that is served below the sponsored result(s) that always "conveniently" expands after a short delay to push the first actual result down the page and replaces it with yet more sponsored content), 3rd party/cross site abuses (Malware), as well as the overabundance and omnipresent ad-spam. Sites that break as a result of my opt-in JS browsing is usually a sign it's not worth my time. Sometimes I'm proven wrong, but sites that can fallback gracefully and display some basic info without JS are usually the worst offenders..
TL;DR: Yes, in a way, I do prefer "the web from 1995", where Javascript isn't everywhere, and only present in places that I specifically whitelist, because it's all too often abused to negatively impact my experience instead of enriching it.
There are a lot of technologies that can be used for chat. Literally by looking for a flash chat room (searched "flash chat room for a website") the third result I got in google was a html5 based one. Just to name a few random examples of open source html/css/js based chats: https://github.com/credija/opa https://conversejs.org/ https://rocket.chat/ https://firechat.firebaseapp.com/ https://deadsimplechat.com/ and since I mentioned css, I have to add this: https://github.com/kkuchta/css-only-chat :)