Exposing events on ev-click instead of data-click

[Raynos]

We could change the way we do events so that we use

ev-click instead of data-click.

This will mean that from a user point of view

h('div', {
  ev-focus: fn,
  data-focus: hook
})

Does not cause collisions. They can use both the elem.focus() hook and the focus event handler through dom-delegator.

Other benefits include that we always know properties in ev-* namespace are event handlers so we can invoke dom-delegator functions directly, this will allow dom-delegator to manage lazy event handlers.

cc @Matt-Esch

[neonstalwart]

can this be closed now?

[Raynos]

yes.