svelte/site/content/tutorial/10-transitions/02-adding-parameters-to-transitions/app-b/App.svelte

<script>
	import { fly } from 'svelte/transition';
	let visible = true;
</script>

<label>
	<input type="checkbox" bind:checked={visible}>
	visible
</label>

{#if visible}
	<p transition:fly="{{ y: 200, duration: 2000 }}">
		Flies in and out
	</p>
{/if}