FrontendHaltNetworking·Advanced·Conceptual·1 min read
What is a 103 Early Hints response?
Short interview answer
An informational status the server can send before the final response while it's still assembling the page, carrying Link headers that tell the browser to start preloading or preconnecting to critical resources. It reclaims the server's think-time for useful network work.
Key takeaway
Explain the underlying mental model clearly, then support it with a concrete example and its trade-offs.