svelte/site/content/examples/13-actions/01-adding-parameters-to-actions/App.svelte

<script>
	import { longpress } from './longpress.js';

	let pressed = false;
	let duration = 2000;
</script>

<label>
	<input type=range bind:value={duration} max={2000} step={100}>
	{duration}ms
</label>

<button use:longpress={duration}
	on:longpress="{() => pressed = true}"
	on:mouseout="{() => pressed = false}"
>press and hold</button>

{#if pressed}
	<p>congratulations, you pressed and held for {duration}ms</p>
{/if}