const bcrypt = require('bcryptjs');
const jwt = require('jsonwebtoken');

const JWT_SECRET = require('../../config/keys').JWT_SECRET;
const userModel = require('../../models/User');

const postChangePassword = async (req, res) => {
    let isChanged = true;
    const { token, newPassword } = req.body;

    try {
        const verified = jwt.verify(token, JWT_SECRET);
        const _id = verified.id;
        const hashedPassword = await bcrypt.hash(newPassword, 8);
        await userModel.updateOne({ _id }, { $set: { password: hashedPassword } });
    } catch (error) {
        isChanged = false;

        console.log(error);
    }

    res.render('change-password', { isChanged });
    console.log('wow');
};

module.exports = postChangePassword;

My controller is like that for using app.post("/change-password", postChangePassword). But res render is unresponsive. It does not giving error but it's not working even I try res.json or redirect. The request is coming from fetch() method another in the app and the other codes is working well except res.something.

And here is my POST code where request comes from

  <script>


        async function postToken(event) {

            event.preventDefault();
            const password = document.getElementById('password').value
            const token = localStorage.getItem('token')

            const result = await fetch('/authUser/change-password', {
                method: 'POST',
                mode: 'cors',

                headers: {
                    'Accept': 'application/json',
                    'Content-Type': 'application/json'
                },

                body: JSON.stringify({

                    newPassword: password,
                    token: token
                }),

            })
        }

        const form = document.getElementById('form')
        form.addEventListener('submit', postToken)
    </script>