the error part pageReferenceError: res is not defined

Question

I am just rendering the dashboard page after successfull login but even though credentials are correct , i am still not able to see dashboard page .

Here my server.js file code!

app.post("/login",async(req,res)=>{
try{
const email = req.body.fromemail;
const password = req.body.password;

const useremail = await User.findOne({email:email});
const isMatch = await bcrypt.compare(password,useremail.password);

console.log(isMatch);
const token = await useremail.generateAuthToken();
console.log("the token part"+token);

if (isMatch){
res.status(201).render("dash");
}
else{
res.send("invalid login details");
}

// res.send(userstatus.password)
// console.log(userstatus.password);
// // console.log(email+" and "+password);
// res.render("dash");

}catch(err){
console.log("the error part page"+err);
res.status(400).send("invalid");
}
// res.render("dash");
})

Answer 1

You got error because you are using res intend of response so you should call it like that 👇
const res = require('express/lib/response')

Answer 2

Yes but past the variable res near where you are set modules variables

Ex.
const express = require('express');
const res = require ('express/lib/response') // to tell the playground that you are using 'response' on your parameters on

app.post('login', (req, res)=>{
some code...
})

Because some playground don't recognize the abbreviation key words

Answer 3

I have already passed it as parameter