Event Notes

Optional Event Handling Info (from goog.events)

• PointerTypes in IE 10 require handling integer codes
• isMouseActionButton Need the following logic: left-click on windows/linux, and left-click without the ctrl key on Macs. Webkit does not ctrl+click to be a right-click, so we have to normalize it to behave like Gecko and Opera.
• goog has some code which deals with passive events https://blog.chromium.org/2016/05/new-apis-to-help-developers-improve.html https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener
• There is an option for "listen once" for DOM events: https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener