svelte/test/runtime/samples/object-rest/main.html

<pre>{JSON.stringify(props)}</pre>
<script>
	export default {
		data: () => ({
			unwanted: 1,
			wanted: 2
		}),

		helpers: {
			// prevent this being mixed in with data
			JSON
		},

		computed: {
			props: ({ unwanted, ...x }) => x
		}
	};
</script>