4 ms·

What year was that? The custom tags thing used to have a lot more problems than it does now.

• troupo 2y ago
  Browsers have always been lenient towards errors in markup. Unknown elements would just be rendered as <p> or <span> (can't remember which). Much later this was codified in HTML 5: if a browser doesn't know an element, it will render it as basically a span (that is, inline element with default styling IIRC).
  • blowski 2y ago
    Up to IE7, non-standard elements couldn't be styled without a shiv.
    • troupo 2y ago
      My memory doesn't extend that far back :) Even though I've been "in the biz" since early 2000s