> I am willing to entertain the idea that You better do, literally every authoritative description of web components lists shadow DOM, custom elements, and tem

> I am willing to entertain the idea that You better do, literally every authoritative description of web components lists shadow DOM, custom elements, and template. And the last one is kind of a remnant of the push for HTML imports, which went nowhere, and is currently insufficient for anything you'd use React for, so its main value now is how it's being repurposed for declarative shadow DOM. So, personally, I'd say they're about shadow DOMs and custom elements, whether that's useful or not; I'm not convinced either!