Unable to successfully import { next } from the 'express' module using Typescript

Having some trouble with this line of code:

import {response, request, next} from 'express'

The typescript compiler in vscode is giving me the following error:

Module '"express"' has no exported member 'next'. 

Update: I want to clarify that I am importing these types in a separate file from my main 'server.ts', so I'm looking for a solution that keeps my code clean and only imports what is absolutely necessary.

Answer №1

One way to import express is by using the following syntax:

import express from 'express';

Once you have created your expressApp, you can utilize it for your endpoint in the following manner:

this.expressApp.post('endpointName', async (req, res, next) => { })

Answer №2

When working with the next callback argument, it is important to use the correct type which is NextFunction:

import { Request, Response, NextFunction} from 'express';

export default function (req : Request , res : Response, next : NextFunction ) {
  …
}

Answer №3

Thank you to everyone who provided feedback!

I recently installed express using the command "npm i express," and it came with version 4.18.1. To address an issue specific to this version, I resolved it by running "npm i @types/express" and utilizing "NextFunction" as the type (example: importing {Response, Request, NextFunction} from 'express' and then defining const auth = async (req : Request, res : Response, next: NextFunction))

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