derived in Svelte

<script>
  let count = $state(0);
  
  // Simple derived
  const doubled = $derived(count * 2);
  
  // Object derived
  const stats = $derived({
    count,
    doubled: count * 2,
    isEven: count % 2 === 0
  });
</script>

<p>Count: {count}, Doubled: {doubled}</p>