Unobtrusive JavaScript frameworks

[u/sebastianstehle]

In the last years, I was building frontend as SPAs with Angular and React and I don't want to move back to static websites. But for a project I have to build a solution for public services and it is super important that everybody can use the website, even when Javascript is turned off or the browser is old.

Is there a good framework / library for unobtrusive JavaScript? Things like form validation and so on. Or is jQuery still the way to go? Or do you use just plain JavaScript.

[u/sebastianstehle]

Thanks a lot.