Nodejs ReferenceError: require is not defined in ES module scope

Dung Do Tien Jul 01 2022 619

Hello dev guys. I am a beginner about Nodejs and I created an simple app that help me get data from an API and display that data into the browser. I used express module to help create server but I got an error ReferenceError: require is not defined in ES module scope, you can use import instead.

 ReferenceError: require is not defined in ES module scope, you can use import instead
This file is being treated as an ES module because it has a '.js' file extension and 'C:\Users\conta\source\repos\NodeJs\Demo1\package.json' contains "type": "module". To treat it as a CommonJS scr
ipt, rename it to use the '.cjs' file extension.
    at file:///C:/Users/conta/source/repos/NodeJs/Demo1/index.js:2:15
    at (node:internal/modules/esm/module_job:198:25)
    at async Promise.all (index 0)
    at async ESMLoader.import (node:internal/modules/esm/loader:385:24)
    at async loadESM (node:internal/process/esm_loader:88:5)
    at async handleMainPromise (node:internal/modules/run_main:61:12)

Here is my index.js file

 import fetch from "node-fetch";
var express = require('express');
var app = express();

app.get('/', async (req, res) =>  {
        const result = await getUser();

var server = app.listen(5000, function () {
    console.log('Server is running..');

async function getUser() {
    try {
      const response = await fetch('');
      if (!response.ok) {
        throw new Error(`Error! status: ${response.status}`);
      const result = await response.json();
      return result;
    } catch (err) {

I installed Nodejs v16.15.1 and run on Window 11.

Please help me if you know any solution.

Thank you in advance.

Have 1 answer(s) found.
  • Đ

    Đặng Thanh Tuấn Jul 01 2022

    Your Node version is 26, it's the latest version and it does not support the syntax require('express').  If you install node version 12 you can use this syntax.

    To solve your issue, please change line 2:

     var express = require('express');


     import express from "express";

    And your issue will be solved.

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