Unable to use new Promise() in TypeScript

Question

Expected Behavior: Able to use promises in TypeScript.

Observed Behavior: Using promises gives the following type error, 'new' expression, whose target lacks a construct signature, implicitly has an 'any' type.ts(7009)

How to duplicate the problem: 1) Within a create react app using TypeScript try creating a promise.

 const test = new Promise<string>((res, _rej) => {
    res("hi");
  });

Answer 1

You can use Promise.resolve instead like as below:

const test = Promise.resolve<string>("Hi")