Bold text on google form response email - forms

Question

I've this script done in google forms to send an email.
I'd like to add bold on "var message" and "message"
function onFormSubmit(e) {
var s = SpreadsheetApp.getActiveSheet();
var headers = s.getRange(1,1,1,s.getLastColumn()).getValues()[0];
var message = "Hello, this a new vacation request by an agent "+e.namedValues[headers[7]]+": \n \n";
var subject = "New Holiday Request";
for(i=1 ; i < 7; i++) {
message += headers[i] + ': ' + e.namedValues[headers[i]] + "\n\n";
}
var email = e.namedValues[headers[7]] + '#google.com';
//Logger.log(email);
MailApp.sendEmail(email, subject, message);
}
the result is:
Hello, this a new vacation request by an agent tayzer:
Timestamp: 5/15/2020 17:56:11
Start date (From the, included): 5/15/2020
the expected is:
Hello, this a new vacation request by an agent tayzer:
Timestamp: 5/15/2020 17:56:11
Start date (From the, included): 5/15/2020

Answer 1

How about this modification?
In this modification, the message including the bold type is sent using htmlBody. When your script is modified, please modify as follows.
From:
var message = "Hello, this a new vacation request by an agent "+e.namedValues[headers[7]]+": \n \n";
var subject = "New Holiday Request";
for(i=1 ; i < 7; i++) {
message += headers[i] + ': ' + e.namedValues[headers[i]] + "\n\n";
}
var email = e.namedValues[headers[7]] + '#google.com';
//Logger.log(email);
MailApp.sendEmail(email, subject, message);
To:
var html = "<b>Hello, this a new vacation request by an agent "+e.namedValues[headers[7]]+":</b><br><br>";
var subject = "New Holiday Request";
for(i=1 ; i < 7; i++) {
html += "<b>" + headers[i] + ':</b> ' + e.namedValues[headers[i]] + "<br><br>";
}
var email = e.namedValues[headers[7]] + '#google.com';
MailApp.sendEmail({to: email, subject: subject, htmlBody: html});
Note:
In this case, when the client can read the HTML mail, the bold type can be seen. When the client cannot read the HTML mail, the text is shown.
Reference:
sendEmail(message)