30+ IntersectionObserver's

 Having over 30 IntersectionObserver's on one of my pages does not slow the page down.


I show a carousel of images next to each section when the section is visible. 


Before I added observers, all the carousels were running all the time. All these animations was slowing the page downa a little.


It was simpler for me to code each observer to observe just one target element.


There are more tips at: bbingo.xyz/t

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