On: HTML Attributes vs. DOM Properties

[bryancoxwell]

For custom elements you may want to store data or methods that modify the element’s behavior.

[berkes → bryancoxwell]

Methods as in callbacks? So, code? Do you then store a closure or such? Or a pointer to one (i.e. the function/name)? And how or what data would modify behaviour?

As said: I'm unfamiliar with these concepts as I actively try to avoid them :)