svelte/test/runtime/samples/event-handler-custom-each/main.html

{{#each items as item}}
	<button on:tap='set({ fromDom: this.textContent, fromState: item })'>{{item}}</button>
{{/each}}

<p>fromDom: {{fromDom}}</p>
<p>fromState: {{fromState}}</p>

<script>
	export default {
		data: () => ({
			x: 0,
			y: 0,
			fromDom: '',
			fromState: '',
			items: [ 'foo', 'bar', 'baz' ]
		}),

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

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

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