[jhoh]

That's just Apple not implementing modern web standards. Just wait a couple months or years and they might implement the IntersectionObserver. Until then you'll have to use polyfills to support Safari which Google obviously didn't do here.

[fells]

Or travel back in time a month. It was added in Safari 12.1.

https://webkit.org/blog/8718/new-webkit-features-in-safari-1...

[jhoh]

Wow, just two years after Chrome, Firefox, Opera and even Edge added it!

https://caniuse.com/#feat=intersectionobserver