svelte/test/runtime/samples/instrumentation-script-destructuring/main.html

<script>
	let x = 0;

	function foo() {
		({ x } = { x: 1 });
	}

	function bar() {
		([x] = [2]);
	}
</script>

<button on:click={foo}>foo</button>
<button on:click={bar}>bar</button>

<p>x: {x}</p>