Harry Roberts delves into the lesser-known Cache-Control request header, emphasizing its role in managing how browsers and CDNs handle cached responses. While developers are familiar with Cache-Control as a response header that instructs on cache storage, its request counterpart plays a crucial role in ensuring content freshness. This header allows the browser to dictate whether to serve cached content or make a new network request. Understanding the differences in behavior between a standard refresh and a hard refresh across browsers is vital for developers aiming to optimize web performance.
The Cache-Control request header determines whether the browser retrieves content from the cache or forces a network request, critical for ensuring content freshness.
Commonly seen during refresh actions, Cache-Control request headers enable clients to enforce revalidation, with variations across different browser behaviors.
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