svelte/test/runtime/samples/computed-values-function-dependency/main.html

<script>
	let _x;

	function getX () {
		return _x;
	}

	export let y = 1;

	function xGetter() {
		_x = y * 2;
		return getX;
	}

	export function x() {
		return xGetter()();
	}
</script>

<p>{x()}</p>