A Deep Dive into Native Lazy-Loading for Images and Frames
CSS - Tricks
MAY 15, 2019
Make sure your servers support the HTTP Range: 0-2047 header and respond with status code 206 (Partial Content) to prevent them from delivering the full image twice. And then there's tracking: Assuming many unsuspecting tracking pixels and frames will be prevented from being loaded, the analytics and affiliate industry will have to act.
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