Unverified50% confidenceFactExact time
Native APIs such as IntersectionObserver and requestAnimationFrame are implemented inside the browser and do not block the main thread, making them more performant than traditional scroll event listeners combined with getBoundingClientRect.
1
Sources
50%
Confidence
Long-term
Relevance
8/12/2026
First Seen
Sources
props-for-that：让CSS直接读取JS状态的开源库详解
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