(Node.js) Find XML Element where Attribute = Value

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Finds an XML element at a particular location where an attribute has a specified value.

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() {

    // We have the following XML and wish to find the value of the time attribute where msg = "alert-from".

    // <cdr id="4e5d3e7f41bf6201ad81000c29703270" e164="6207">
    //     <user>
    //         <grp name="wfln" mode="active"/>
    //     </user>
    //     <event msg="setup-to" time="287069" e164="5034"/>
    //     <event msg="alert-from" time="287069" e164="5034"/>
    //     <event msg="rel-to" time="287079" e164="5034"/>
    // </cdr>

    var success;

    // First, build the above XML:

    var xml = new chilkat.Xml();
    xml.Tag = "cdr";
    xml.AddAttribute("id","4e5d3e7f41bf6201ad81000c29703270");
    xml.AddAttribute("e164","6207");
    xml.UpdateAttrAt("user|grp",true,"name","wfln");
    xml.UpdateAttrAt("user|grp",true,"mode","active");
    xml.UpdateAttrAt("event",true,"msg","setup-to");
    xml.UpdateAttrAt("event",true,"time","287069");
    xml.UpdateAttrAt("event",true,"e164","5034");
    xml.UpdateAttrAt("event[1]",true,"msg","alert-from");
    xml.UpdateAttrAt("event[1]",true,"time","287069");
    xml.UpdateAttrAt("event[1]",true,"e164","5034");
    xml.UpdateAttrAt("event[2]",true,"msg","rel-to");
    xml.UpdateAttrAt("event[2]",true,"time","287079");
    xml.UpdateAttrAt("event[2]",true,"e164","5034");

    // Show that we have the above XML
    console.log(xml.GetXml());

    // Find the element where msg = "alert-from"
    // This updates the xml object's reference to the found element (if successful).
    var notUsed = xml.ChilkatPath("/A/event,msg,alert-from|$");
    if (xml.LastMethodSuccess == false) {
        console.log("Not found.");
        return;
    }

    // Get the value of the "time" attribute.
    console.log("time = " + xml.GetAttrValue("time"));

    // Restore the xml object's internal reference to the root of the XML document
    xml.GetRoot2();

}

chilkatExample();