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rjbwork
on Aug 16, 2017
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Passive event listeners
Why do you need to detect whether something is in the viewport?
SimeVidas
on Aug 16, 2017
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For lazyloading stuff like images and ads. Or that technique where you have an infinite list, and the elements that are scrolled off-screen are recycled on the other end.
esailija
on Aug 17, 2017
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You can easily scroll so that the intersection observer sentinels are not seen and cause bugs. Disappointing.
eyelidlessness
on Aug 16, 2017
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The linked description provides several use cases.
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