Hc_page.Ev
Hc connection cycle events.
FIXME. Document in the manual.
FIXME. Expand on that. Also end with error attribute would likely be nicer. Ensures start/end comes in pair.
hc_in
is sent on the element that gets classifed by hc-in-parent
, just before they get classified. This is the parent element of what gets newly inserted in the DOM. Ev
.prevent_default is called on the event, the classification dance does not occur.
FIXME. Wouldn't it be better to expose MutationObserver hooks ?