Add various fields in the text section of nodemailer - node.js

Question

I'm sending mail from my angular app using nodemailer. I have a variable which has several attributes like firstname, middlename, email, mobile, address. I'm fetching this data from firebase and each variable can be accessed by writing $data.firstname, $data.email. I was able to send only 1 variable right now. I want to send all the variables to the mail with labels
So mail content should be
Email - abc#123
First Name - ABC
Address - LMN
Mobile - 7777777777
Please help me out.
const functions = require('firebase-functions');
const admin = require('firebase-admin');
const nodemailer = require('nodemailer');
admin.initializeApp()
require('dotenv').config()
const {SENDER_EMAIL, SENDER_PASS} = process.env;
exports.sendMailNotification1=functions.firestore.document('submissions/{docID}')
.onCreate((snap, ctx)=> {
const data=snap.data();
let authData=nodemailer.createTransport({
host: 'smtp.gmail.com',
port: 465,
secure:true,
auth:{
user: SENDER_EMAIL,
pass: SENDER_PASS
}
});
authData.sendMail({
from: 'xxx#gmail.com',
to: 'xyz#gmail.com',
subject: 'Appointment Info ',
text:`${data.fname}`,
html:`${data.email}`,
}).then(res=>console.log('Succesfully Sent')).catch(err=> console.log(err)
);
})

Answer 1

As explained in the NodeMailer doc, you can choose between:
using the message's text element for sending "the plaintext version of the message"
OR
using the message's html element for sending "the HTML version of the message".
So for example, if you use the HTML option you could use an HTML list as follows:
//...
const htmlContent = `<ul><li>Email - ${data.email}</li><li>Address - ${data.address}</li></ul>`;
return authData.sendMail({
from: 'xxx#gmail.com',
to: 'xyz#gmail.com',
subject: 'Appointment Info',
html: htmlContent
})
.then(res => {
console.log('Succesfully Sent');
return null;
})
.catch(err => {
console.log(err);
return null;
});
Note the addition of several returns in the code, see https://firebase.google.com/docs/functions/terminate-functions for more info on this key aspect.