(Node.js) Access Attached Message (Embedded Email)

How to access an email embedded within another email (i.e. an attached message).

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    var email = new chilkat.Email();

    // Load an email from a .eml
    var success = email.LoadEml("embeddedEmail.eml");
    if (success !== true) {
        console.log(email.LastErrorText);
        return;
    }

    // Display how many attached emails are embedded within
    // this one:
    var numAttached = email.NumAttachedMessages;
    console.log("numAttached = " + numAttached);

    // Get the 1st attached message.
    // email2: Email
    var email2;
    email2 = email.GetAttachedMessage(0);
    if (email.LastMethodSuccess == true) {

        // Display the subject, From, and a header field...
        console.log(email2.Subject);
        console.log(email2.From);
        console.log(email2.GetHeaderField("X-SOMETHING"));
    }


}

chilkatExample();