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本文深度剖析了 requestAnimationFrame (rAF) 作为创建高性能 JavaScript 动画的权威 API。内容从浏览器渲染帧的生命周期入手，系统性地阐述了传统 setInterval 动画在时序上的缺陷，并详细解析了 rAF 如何通过与渲染管线同步来保证动画的流畅性与高效性，最后提供了一个构建平滑、自适应动画循环的最佳实践。
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