How to use the Nodemailer library for sending HTML emails in Node.js

Nodemailer is a popular library in Node.js for sending emails. To send HTML emails using Nodemailer, you can follow these steps:

1. Install Nodemailer: Make sure you have Nodemailer installed in your project. You can install it using npm:

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npm install nodemailer

2. Create a Nodemailer transporter: Set up a transporter with the SMTP details of your email provider. Here's an example using Gmail:

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const nodemailer = require('nodemailer');

// Create a transporter using SMTP details
const transporter = nodemailer.createTransport({
  service: 'gmail',
  auth: {
    user: 'your_email@gmail.com',
    pass: 'your_email_password',
  },
});

3. Compose the email: Create an object with the details of your email, including the HTML content. For example:

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const mailOptions = {
  from: 'your_email@gmail.com',
  to: 'recipient_email@example.com',
  subject: 'Subject of the email',
  html: '<p>Your HTML content goes here</p>',
};

4. Send the email: Use the transporter.sendMail method to send the email:

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transporter.sendMail(mailOptions, (error, info) => {
  if (error) {
    console.error(error);
  } else {
    console.log('Email sent: ' + info.response);
  }
});

Putting it all together:

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const nodemailer = require('nodemailer');

// Create a transporter using SMTP details
const transporter = nodemailer.createTransport({
  service: 'gmail',
  auth: {
    user: 'your_email@gmail.com',
    pass: 'your_email_password',
  },
});

// Compose the email
const mailOptions = {
  from: 'your_email@gmail.com',
  to: 'recipient_email@example.com',
  subject: 'Subject of the email',
  html: '<p>Your HTML content goes here</p>',
};

// Send the email
transporter.sendMail(mailOptions, (error, info) => {
  if (error) {
    console.error(error);
  } else {
    console.log('Email sent: ' + info.response);
  }
});

Make sure to replace 'your_email@gmail.com', 'your_email_password', and 'recipient_email@example.com' with your actual email and password, and the recipient's email address.