Getting ReferenceError: err is not defined-CodePudding

I am new to js try to learn supertest and stuck in this error. Kindly help!

import { describe } from "mocha";
import supertest from "supertest";
import { expect } from "chai";

const request = supertest('https://gorest.co.in/public/v2/');

const api_token = '45faa1e4b06b3cc1d5ecfbe639235376838cf638c85f88cb9bcc04e954bbf77f';

describe('GET /user' , () =>{
it('fetching user details', (done) =>{
    request.get(`users?access-token=${api_token}`).end((err,res), () =>{
       console.log(err);
        console.log(res.body);  
       // expect(res.body).to.not.be.empty;
       done();

    })
})
})

Getting err is not defined

CodePudding user response：

You are not declaring the callback correctly.

Change this:

request.get(`users?access-token=${api_token}`).end((err,res), () =>{

to this:

request.get(`users?access-token=${api_token}`).end((err,res) =>{

The error occurs because you try to pass (err, res) all by itself as an argument to .end(), but neither of those variables exist in the current scope so you get a ReferenceError on the first one.

CodePudding user response：

Your syntax for passing callback function is incorrect. end() takes one callback function so you need to change .end((err,res), () =>{ to .end((err,res) =>{