Svelte · Senior · Question 4 of 75

Why does this effect run only once, even though `state.value` changes?

let state = $state({ value: 0 });

$effect(() => {
  console.log(state);
});

✓Correct answer: The effect depends on state itself, which is never reassigned; it doesn't read state.value
2Effects run only once by design
3Proxies can't be logged

Explanation

An effect reruns only when what it actually read changes. To log deep changes during development, use $inspect(state).

Further reading

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