如何使用express js以html格式发送电子邮件

const express = require('express');
const nodemailer = require('nodemailer');

const app = express();

// 创建Nodemailer传输对象
const transporter = nodemailer.createTransport({
    host: 'smtp.example.com',
    port: 587,
    secure: false, // true for 465, false for other ports
    auth: {
        user: 'your_email@example.com',
        pass: 'your_email_password'
    }
});

app.get('/send-email', (req, res) => {
    const mailOptions = {
        from: 'your_email@example.com',
        to: 'recipient@example.com',
        subject: 'Test HTML Email',
        html: `
            <h1>Hello!</h1>
            <p>This is a test email with <strong>HTML</strong> content.</p>
            <a href="https://example.com">Click here</a>
        `
    };

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

app.listen(3000, () => {
    console.log('Server is running on port 3000');
});