package.json

{
  "name": "backend",
  "version": "1.0.0",
  "main": "index.js",
  "type": "module",
  "scripts": {
    "dev": "cross-env NODE_ENV=dev nodemon index.js",
    "tests": "mocha --exit"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "description": "",
  "dependencies": {
    "@types/node": "^20.14.2",
    "node": "^20.14.0"
  },
  "devDependencies": {
    "chai": "^5.1.1",
    "chai-http": "^5.0.0",
    "cross-env": "^7.0.3",
    "mocha": "^10.4.0",
    "nodemon": "^3.1.3",
    "sinon": "^18.0.0",
    "supertest": "^7.0.0"
  }
}

user.test.js

import * as chaiModule from "chai";
import chaiHttp from "chai-http";

const chai = chaiModule.use(chaiHttp);

chai.request() // Throws an error "request is not a function" and:
// \node_modules\chai-http\ has a "main" field set to "./index", excluding the full filename and extension to the resolved file at "index.js"
// Automatic extension resolution of the "main" field is deprecated for ES modules.