realtomaszkula/ng-reactive-sticky-header#distinct-stream.ts

Last active June 18, 2018 12:49

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ng-reactive-sticky-header#distinct-stream.ts

	const scroll$ = fromEvent(window, 'scroll').pipe(
	throttleTime(10),
	map(() => window.pageYOffset),
	pairwise(),
	map(([y1, y2]): Direction => (y2 < y1 ? Direction.Up : Direction.Down)),
	distinctUntilChanged(),
	);

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