IntersectionObserver API Support

[keithws]

Do you have any plans to support the IntersectionObserver API? It is supposed to be more performant than Element.getBoundingClientRect() and is becoming widely supported.

[callmecavs]

will likely update this lib at some point, if i find the time

if you want to use IntersectionObserver for the time being, check out obzerv. it tracks elements relative to the viewport in a more general sense. there's an example on the README that shows how to load an image lazily