Direct use of the global window object

[FFKL]

I'm submitting a...

[x] Regression (a behavior that used to work and stopped working in a new release)
[ ] Bug report  
[ ] Performance issue
[x] Feature request
[ ] Documentation issue or request
[ ] Support request
[ ] Other... Please describe:

Current behavior

dirtyCheck operator uses global window object.

dirty-check-forms/libs/dirty-check-forms/src/lib/dirty-check.ts

Lines 62 to 64 in 944447a

	observer.add(
	fromEvent(window, 'beforeunload')
	.pipe(withLatestFrom(isDirty$))

Expected behavior

I think, It's better to pass window option in config.

What is the motivation / use case for changing the behavior?

Current behavior leads to restrictions on the use of SSR. Also it's impossible to apply dirtyCheck without beforeunload event.

[FFKL]

@NetanelBasal Of course, I can implement it.

[NetanelBasal]

Go ahead