FrontendHaltHTML·Advanced·Conceptual·1 min read
What does fetchpriority="high" do, and when is it appropriate?
Short interview answer
It's a hint that raises an image's priority relative to other resources competing for bandwidth early in the page load, useful on the one image most likely to be the LCP element; overusing it on many images removes the signal's value since not everything can be highest priority.
Key takeaway
Explain the underlying mental model clearly, then support it with a concrete example and its trade-offs.