比如邮件的HTML里要加上用户名 怎么样能够像使用模板引擎比如ejs那样使内容可以变量化

nodemailer示例

var nodemailer = require('nodemailer');

// create reusable transporter object using SMTP transport
var transporter = nodemailer.createTransport({
    service: 'Gmail',
    auth: {
        user: 'gmail.user[@gmail](/user/gmail).com',
        pass: 'userpass'
    }
});

// NB! No need to recreate the transporter object. You can use
// the same transporter object for all e-mails

// setup e-mail data with unicode symbols
var mailOptions = {
    from: 'Fred Foo ✔ <foo[@blurdybloop](/user/blurdybloop).com>', // sender address
    to: 'bar[@blurdybloop](/user/blurdybloop).com, baz[@blurdybloop](/user/blurdybloop).com', // list of receivers
    subject: 'Hello ✔', // Subject line
    html: '<b>Hello world ✔</b>' // html body
};

// send mail with defined transport object
transporter.sendMail(mailOptions, function(error, info){
    if(error){
        console.log(error);
    }else{
        console.log('Message sent: ' + info.response);
    }
});