What's the downside to using custom (non-registered) elements?
Things like
<foo>, <bar> etc just behave like <div> and can be styled based on tag name instead of classes. Is there any downside, really?1 Reply
it's against spec, so it can cause unexpected behavior
there's no guarantee that they will remain "custom" (the correct word would be invalid, btw), and not get implemented with special functionality later
others that read your code will have no idea wtf you're doing
If you want to use custom elements, that's fine, but follow the guidelines and use the Web Component api