That is one way to do it, provided `user-avatar` extends HTMLImageElement and not the more generic HTMLElement. Extending built-ins and using the `is` attribute

That is one way to do it, provided `user-avatar` extends HTMLImageElement and not the more generic HTMLElement. Extending built-ins and using the `is` attribute is not supported in Safari however and last I checked they were firmly opposed to it. https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/is https://developer.mozilla.org/en-US/docs/Web/HTML/Global_att...