FrontendHaltPerformance·Advanced·Conceptual·1 min read
Why might preloading a lazy chunk before it's needed be worthwhile?
Short interview answer
If a user's next likely action is predictable, such as hovering a link before clicking it, preloading its chunk in the background can eliminate the loading delay entirely by the time the user actually triggers the lazy-loaded feature.
Key takeaway
Explain the underlying mental model clearly, then support it with a concrete example and its trade-offs.