svelte/test/validator/samples/helper-purity-check-uses-arguments/input.html

{{sum(1, 2, 3)}}

<script>
	export default {
		helpers: {
			sum () {
				var total = '';
				for ( var i = 0; i < arguments.length; i += 1 ) total += arguments[i];
				return total;
			}
		}
	}
</script>