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

<p>{a} + {b} = {c}</p>
<p>{c} * {c} = {cSquared}</p>

<script>
	export default {
		data: () => ({
			a: 1,
			b: 2
		}),

		computed: {
			c: ({ a, b }) => a + b,
			cSquared: ({ c }) => c * c
		}
	};
</script>