how to do confirm email address with express/node?

Question

Im trying to build confirm email address for users, to verify their email is real. What package should i use to confirm the email address of the user. So far Im using mongoo

Answer 1

I spent a lot of time figuring out the perfect way to send confirmation mail. Here is the method I used.

Libraries

const jwt = require('jsonwebtoken');
const nodemailer = require("nodemailer");

Step 1 Encode the user id in a jwt token with an expiration date

var date = new Date();
var mail = {
            "id": user.id,
            "created": date.toString()
            }

const token_mail_verification = jwt.sign(mail, config.jwt_secret_mail, { expiresIn: '1d' });

var url = config.baseUrl + "verify?id=" + token_mail_verification;

Step 2 Send the token to the user email address using nodemailer library

 let transporter = nodemailer.createTransport({
        name: "www.domain.com",
        host: "smtp.domain.com",
        port: 323,
        secure: false, // use SSL
        auth: {
            user: "user@domain.com", // username for your mail server
            pass: "Password", // password
        },

    });

    // send mail with defined transport object
    let info = await transporter.sendMail({
        from: '"NAME" ', // sender address
        to: user.email, // list of receivers seperated by comma
        subject: "Account Verification", // Subject line
        text: "Click on the link below to veriy your account " + url, // plain text body
    }, (error, info) => {

        if (error) {
            console.log(error)
            return;
        }
        console.log('Message sent successfully!');
        console.log(info);
        transporter.close();
    });

Step 3 Accept the verification link

app.get('/verify', function(req, res) {
    token = req.query.id;
    if (token) {
        try {
            jwt.verify(token, config.jwt_secret_mail, (e, decoded) => {
                if (e) {
                    console.log(e)
                    return res.sendStatus(403)
                } else {
                    id = decoded.id;

                
//Update your database here with whatever the verification flag you are using 



                }

            });
        } catch (err) {

            console.log(err)
            return res.sendStatus(403)
        }
    } else {
        return res.sendStatus(403)

    }

})

Step 4 Have a coffee and THANK ME for saving your so much time

PS: This nodemailer SMTP method will even work with your hosting. So no need to go for third party. You can also find ways to use gmail with nodemailer.