TypeScript: how to type to http params?

Question

I have two query params from the url and trying to take them out by using {} and assign types to them. However, it is causing error.

const {firstName: string, lastName: string} = req.query;

I am getting cannot redeclare block-scoped variable 'string'.. Is it possible to assign type inside the {}? Or, do I have to assign them one by one?

It's a syntax error. You are trying to assign a value to a type. const variableName: {firstName: string, lastName: string} = req.query; Or, if you are trying to destructure the object, the posted answer from tkausl is applicable. — Chris Baker
– Chris Baker, Commented Nov 10, 2021 at 18:29

tkausl · Accepted Answer · 2021-11-10 18:23:14Z

3

You can't type your variables inside your destructuring assignment as the : has a different meaning in objects, you have to type the whole object:

const {firstName, lastName}: {firstName: string, lastName: string} = req.query;

answered Nov 10, 2021 at 18:23

tkausl

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