CustomEventTarget

Implementing the EventTarget interface so it can be used by constructed objects/classes extending CustomEventTarget Designing this to work in browser and in node.

TODO

• Construcatable inheritance from EventTarget
• addEventListener
• removeEventListener
• dispatchEvent
  • Working with custom-crafted events which pass a eventOptions.shouldHandle test
  • Handlers with option "once" remove themselves consistently
  • Return value reflects event.preventDefault invocation
  • event.stopPropagation (no bubbling, if capture phase, no non-capture phase)
  • event.stopImmediatePropagation (no further handlers invoked)
• CustomEvent
• Event bubbling; being able to set a parent/child relation between two CustomEventTarget objects