如何在导出功能中导入类？

Question

I am trying to import class and use its public methods but its not working , what is correct way implement it.

main.ts

import {PromiseHandler } from './promiseHandler.ts';
    export function getUser(req: Request, res: Response) {
        const promiseHandler: new PromiseHandler();

    }

promiseHandler.ts

export class PromiseHandler {

    constructor() {};
    public executeAllPromises(promises) {

}

Answer 1

As told in comments, the correct syntax is

 const promiseHandler = new PromiseHandler();

(note the use of = , to assign the object created, while : would be to type the variable. The type is actually just PromiseHandler, so you could use both and write :

const promiseHandler: PromiseHandler = new PromiseHandler(); 

but I think that is not necessary to declare type here, TypeScript would detect it the correct type by itself with the initialisation with = new...