
PASS IntersectionObserver constructor with { threshold: [1.1] } 
PASS IntersectionObserver constructor with { threshold: ["foo"] } 
PASS IntersectionObserver constructor with { rootMargin: "1" } 
PASS IntersectionObserver constructor with { rootMargin: "2em" } 
PASS IntersectionObserver constructor with { rootMargin: "auto" } 
PASS IntersectionObserver constructor with { rootMargin: "calc(1px + 2px)" } 
PASS IntersectionObserver constructor with { rootMargin: "1px !important" } 
PASS IntersectionObserver constructor with { rootMargin: "1px 1px 1px 1px 1px" } 
PASS IntersectionObserver.observe("foo")