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原生JS实现最简单的图片懒加载
source link: https://juejin.im/post/59cb634a6fb9a00a4843bea9
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试一下自己撸一个图片懒加载... Demo地址：axuebin.com/lazyload 照片都是自己拍的哦~ 懒加载 什么是懒加载 懒加载其实就是延迟加载，是一种对网页性能优化的方式，比如当访问一个页面的时候，优先显示可视区域的图片而不一次性加载所有图片，当
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