Matt Walker 34dc538122 Stop events that originate with a removed target ...

As discussed in https://github.com/openlayers/openlayers/issues/6948#issuecomment-565375694

The check to see if the target is within the "page" uses the viewport as
the MapBrowserEventHandler instance adds it's listeners to the viewport.

Using Node.contains appears to have a slight performance benefit
over manually walking the DOM.

2020-01-10 10:48:15 +00:00

..

ol

Stop events that originate with a removed target

2020-01-10 10:48:15 +00:00