How do I send a html file using nodemailer

Question

I am sending emails using nodemailer, but I wanna know how to send a static HTML file from a directory.

  let transporter = nodemailer.createTransport({
      host: auth.host,
      port: auth.port,
      secure: auth.secure,
      auth: {
          type: auth.type,
          user: auth.user,
          clientId: auth.clientId,
          clientSecret: auth.clientSecret,
          refreshToken: auth.refreshToken,
          accessToken: auth.accessToken,
          expires: auth.expires
      }
  });

  let mailOptions = {
    from: '"xxxxx',
    to: 'xxxx',
    subject: "xxxx",
    text: `xxxx`,
    html: email.html
  };

Answer 1

You will have to read the file using the fs module.

const fs = require('fs');

const { promisify } = require('util');

const readFile = promisify(fs.readFile);

async function sendMail() {
    let transporter = nodemailer.createTransport({
      host: auth.host,
      port: auth.port,
      secure: auth.secure,
      auth: {
          type: auth.type,
          user: auth.user,
          clientId: auth.clientId,
          clientSecret: auth.clientSecret,
          refreshToken: auth.refreshToken,
          accessToken: auth.accessToken,
          expires: auth.expires
      }
  });

  let mailOptions = {
    from: '"xxxxx',
    to: 'xxxx',
    subject: "xxxx",
    text: `xxxx`,
    html: await readFile('/path/to/file', 'utf8')
  };

  // send mail
}

If the file won't change, you can cache the content.