Borrow naming convention from Laminar

[davesmith00000]

Something I've come across a lot is what do you call things, e.g. class="" can't be class(..) because it's a reserved word.

Here's how Laminar does it, even if we don't just borrow this library, I think there's benefits in consistency - and they're already thought this through.

https://github.com/raquo/scala-dom-types#naming-differences-compared-to-native-html--dom

[davesmith00000]

Largely done, where I was in agreement.