Types in object destructuring

Question

This

const { foo: IFoo[] } = bar;

and this

const { foo: Array } = bar;

will reasonably cause

Answer 1

NextJS Typescript example

I had scenarios like so:

const { _id } = req.query;
if (_id.contains('whatever')) { // typescript complained
 ...
}

in which the "req.query" was typed like string | string[] from NextJS... so doing this worked:

const { _id } = req.query as { _id: string };
if (_id.contains('whatever')) { // typescript is fine
 ...
}

The irony of this is Typescript was correct but I don't want to do the actual programming work to handle strings and string arrays.