Build a reactive data-fetching utility with Svelte stores
Tests store composition for async data fetching with caching and auto re-fetch. Strong answer: readable for lifecycle, derived's set callback for race-safe fetches, writable for private inputs. Red flag: exposed internals or missing cleanup.
Tests composing Svelte stores into a reactive data-fetching module. Use writable for private inputs, readable with StartStopNotifier to initialize on first subscription, and derived with the async set-callback overload to watch dependencies and trigger fetches. The derived callback must handle race conditions by aborting stale requests or ignoring their results, and manage loading and error states via set. Red flags: exposing writable stores directly, using derived synchronously for async work, or skipping cleanup that causes memory leaks.
Read the original → svelte.dev
- #svelte
- #stores
- #reactivity
- #data-fetching
- #advanced
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