Unverified50% confidenceFactExact time
Intersection Observer API 于 2016 年前后进入 Chrome，解决了在 scroll 事件回调中频繁调用 getBoundingClientRect 的性能痛点
1
Sources
50%
Confidence
Long-term
Relevance
7/11/2026
First Seen
Sources
GSAP in Practice: Build Stunning Landing Page Animations from Scratch
youtubeKevin Powell7/8/2026
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