What is the proper way to include type annotation in a destructured object literal when using the rest operator?

When working with objects, I utilize the spread/rest operator to destructure an object literal.

Is there a way to add type annotation specifically to the rest part?

I attempted to accomplish this task, but encountered an error when running tsc.

const { x, y, ...rest }: {x: number, y: number, ...rest: any} = { x: 1, y: 2, z: 3, q: 4 };

Answer №1

When dealing with the ...rest part, you can utilize this approach:

const { x, y, ...rest }: { x: number, y: number, [key: string]: number } = { x: 1, y: 2, z: 3, q: 4 };

This concept essentially allows for any additional keys to be accepted as strings with numbers as their values.

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