(Node.js) XMP Array Property - Bag, Seq, or Alt

How to insert or update an XMP array property (bag, seq, or alt).

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() {

    // This requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    var xmp = new chilkat.Xmp();

    // Load a JPG or TIF image file.
    // Sample JPG's with XMP metadata may be found at:
    // http://www.chilkatsoft.com/testData/xmp/sample1.jpg
    // http://www.chilkatsoft.com/testData/xmp/sample2.jpg
    // http://www.chilkatsoft.com/testData/xmp/sample3.jpg
    var success = xmp.LoadAppFile("sample1.jpg");
    if (success !== true) {
        console.log(xmp.LastErrorText);
        return;
    }

    console.log("Num embedded XMP docs: " + xmp.NumEmbedded);

    // Assuming there is at least one, get the 1st.
    // (There is typically never more than one, but theoretically it's possible.)
    // xml: Xml
    var xml;
    xml = xmp.GetEmbedded(0);
    if (xmp.LastMethodSuccess == true) {

        // Create an object to hold one or more string values.
        var sa = new chilkat.StringArray();
        success = sa.Append("value_1");
        success = sa.Append("value_2");
        // ...

        success = xmp.AddArray(xml,"bag","Iptc4xmpCore:Chilkat",sa);
        if (success !== true) {
            console.log(xmp.LastErrorText);
        }
        else {
            // Save the JPG.
            success = xmp.SaveAppFile("modified.jpg");
            if (success !== true) {
                console.log(xmp.LastErrorText);
            }

        }

    }
    else {
        console.log(xmp.LastErrorText);
    }


}

chilkatExample();