svelte/test/runtime/samples/event-handler-event-methods/main.html

<div on:click='set({ foo: true })'>
	<button class='allow-propagation'>click me</button>
</div>

<div on:click='set({ bar: true })'>
	<button class='stop-propagation' on:click='event.stopPropagation()'>click me</button>
</div>

<script>
	export default {
		data () {
			return {
				foo: false,
				bar: false
			};
		}
	};
</script>