(Node.js) Add XMP MetaData to JPG or TIFF

Demonstrates how to add XMP metadata to a JPG or TIFF image that doesn't already have XMP metadata.

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

    var xmp = new chilkat.Xmp();

    // xml: Xml
    var xml;

    // The first step is to create a new XMP document, which is nothing
    // more than XML.  The NewXmp method returns an XML document with
    // the standard XMP boilerplate.  
    xml = xmp.NewXmp();

    // Add some properties...
    var success = xmp.AddSimpleStr(xml,"Iptc4xmpCore:Chilkat","Blah blah");
    // If you wish to view the XML, save it to a file and review it
    // with a text editor:
    success = xml.SaveXml("newXmp.xml");
    if (success !== true) {
        console.log(xml.LastErrorText);
        return;
    }

    // To add the XMP to the JPG (or TIFF), simply load the JPG,
    // append the XMP, and save:
    success = xmp.LoadAppFile("scream.jpg");
    if (success !== true) {
        console.log(xmp.LastErrorText);
        return;
    }

    success = xmp.Append(xml);
    if (success !== true) {
        console.log(xmp.LastErrorText);
        return;
    }

    success = xmp.SaveAppFile("screamOut.jpg");
    if (success !== true) {
        console.log(xmp.LastErrorText);
        return;
    }


}

chilkatExample();