-
Do you use customized built-in #HTML elements (≠ autonomous custom elements)?
-
Personally, I use neither. I’d wish to say “yet,” but so far, built-in functionality of #HTML elements worked well for my own projects. As always, the spec is super-useful. I can recommend the whole chapter on custom elements, but html.spec.whatwg.org/multipage/custom-elements.html#custom-elements-core-concepts explains the main ideas.