Keep link to javascript event listener.
Keep link to javascript event listener.

It is very useful if we want change events source from rootElement to another one (and back).

rachelharvey/playn,thecocce/playn-1,rachelharvey/playn,longtaoge/playn,playn/playn,playn/playn,tinkerstudent/playn,tinkerstudent/playn,thecocce/playn-1,longtaoge/playn,playn/playn