{#each items as [item0, item1]}
	<button on:tap='set({ first: item0, second: item1 })'>
		{item0}: {item1}
	</button>
{/each}

<p>first: {first}</p>
<p>second: {second}</p>

<script>
	export default {
		data: () => ({
			x: 0,
			y: 0,
			first: '',
			second: '',
			items: [ [0, 'foo'], [1, 'bar'], [2, 'baz'] ]
		}),

		events: {
			tap ( node, callback ) {
				function clickHandler ( event ) {
					callback();
				}

				node.addEventListener( 'click', clickHandler, false );

				return {
					destroy () {
						node.addEventListener( 'click', clickHandler, false );
					}
				};
			}
		}
	};
</script>