
PASS Observer with multiple thresholds.
PASS First rAF.
PASS document.scrollingElement.scrollTop = 120
PASS document.scrollingElement.scrollTop = 160
PASS document.scrollingElement.scrollTop = 200
PASS document.scrollingElement.scrollTop = 240
PASS document.scrollingElement.scrollTop = window.innerHeight + 140
PASS document.scrollingElement.scrollTop = window.innerHeight + 160
PASS document.scrollingElement.scrollTop = window.innerHeight + 200
PASS document.scrollingElement.scrollTop = window.innerHeight + 220