let transporter = nodemailer.createTransport({
        service: 'gmail',
        auth: {
            user: '********', //email address to send from
            pass: '*********' //the actual password for that account
        }
    });

var mailOptions = {
from: 'Dave <***********>',
to: '*************',
subject: 'Nodemailer test',
text: 'You have reported this comment'
}

transporter.sendMail(mailOptions, function(err,res){
if(err){
    console.log(err);
} else {
    console.log('Email sent');
}
})

<button id="report">Submit</button>

$('#report').on('click', function(){
transporter.sendMail(mailOptions, function(err,res){
if(err){
    console.log(err);
} else {
    console.log('Email sent');
}
})
})