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

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

<script>
	export default {
		data: () => ({
			x: 5,
			domain: [ 0, 10 ],
			range: [ 0, 100 ]
		}),

		computed: {
			scale: ( domain, range ) => {
				return num => {
					const t = domain[0] + ( num - domain[0] ) / ( domain[1] - domain[0] );
					return range[0] + t * ( range[1] - range[0] );
				}
			}
		}
	};
</script>