Svelte · Junior · Question 63 of 76

What does `{#key value}` do?

✓Correct answer: Destroys and recreates its contents when value changes
2Adds a key attribute to elements
3Caches its contents forever

Explanation

Useful to replay a transition on change. It is expensive, so don't use it just to re-run logic; $derived is usually better.

Further reading

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