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Author Andrew Betts

1 article

Andrew is principal developer advocate at Fastly, an elected member of the W3C Technical Architecture Group and co-chair of London Web Performance

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Understanding The Vary Header

The Vary HTTP header is sent in billions of HTTP responses every day. But its use has never fulfilled its original vision, and many developers misunderstand what it does or don’t even realize that their web server is sending it. With the coming of the Client Hints, … Read More…