This November at the Annual W3C Plenary (TPAC) I'll be discussing "Custom Attributes"

GitHub

Custom attributes for all elements · Issue #46 · w3c/tpac2025-breakouts

Session description 2023's breakouts had a discussion on alternatives to customized built-ins. A sketch of a proposal came out around this time: cu...

I'd like to bring the same lifecycle hooks & subclassing of Custom Elements to attributes. I'd _love_ to hear if developers think this is a good or bad idea, and what they'd like to see.