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图片懒加载踩坑
source link: https://juejin.im/post/5add55dd6fb9a07aad171f76
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原文地址：图片懒加载踩坑 原理 对网页加载速度影响最大的就是图片，一张普通的图片可能会有好几 M 的大小，当图片很多时，网页的加载速度变得很缓慢。 为了优化网页性能以及用户体验，我们对图片进行懒加载。 懒加载是一种对网页性能优化的方式，它的原理是优先加载在可视
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