(Node.js) Get the Root of a JSON Document

Demonstrates how to get back to the JSON root object from anywhere in the JSON document. This example uses the following JSON document:

{
  "flower": "tulip",
  "abc":
    {
    "x": [
       { "a" : 1 },
       { "b1" : 100, "b2" : 200 },
       { "c" : 3 }
    ],
    "y": 200,
    "z": 200
    }
}

Note: This example requires Chilkat v11.0.0 or greater.

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

var os = require('os');
if (os.platform() == 'win32') {  
  var chilkat = require('@chilkat/ck-node23-win64'); 
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node23-linux-arm');
    } else if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node23-linux-arm64');
    } else {
        var chilkat = require('@chilkat/ck-node23-linux-x64');
    }
} else if (os.platform() == 'darwin') {
  var chilkat = require('@chilkat/ck-node23-mac-universal');
}

function chilkatExample() {

    var success = false;

    var json = new chilkat.JsonObject();

    var jsonStr = "{\"flower\": \"tulip\",\"abc\":{\"x\": [{ \"a\" : 1 },{ \"b1\" : 100, \"b2\" : 200 },{ \"c\" : 3 }],\"y\": 200,\"z\": 200}}";

    success = json.Load(jsonStr);
    if (success == false) {
        console.log(json.LastErrorText);
        return;
    }

    // Get the "abc" object.
    var abcObj = new chilkat.JsonObject();
    success = json.ObjectOf2("abc",abcObj);
    if (success == false) {
        console.log(json.LastErrorText);
        return;
    }

    // Side note: The JSON of a sub-part of the document can be emitted from any JSON object:
    abcObj.EmitCompact = false;
    console.log(abcObj.Emit());

    // Navigate to the "x" array
    var xArray = new chilkat.JsonArray();
    abcObj.ArrayOf2("x",xArray);

    // Navigate to the 2nd object contained within the array.  This contains members b1 and b2
    var bObj = new chilkat.JsonObject();
    xArray.ObjectAt2(1,bObj);

    // Show that we're at "b1/b2".
    // The value of "b1" should be "200"
    console.log("b2 = " + bObj.IntOf("b2"));

    // Now go back to the JSON doc root:
    var docRoot = new chilkat.JsonObject();
    bObj.GetDocRoot2(docRoot);

    // We'll skip the null check and assume it's non-null...

    // Pretty-print the JSON doc from the root to show that this is indeed the root.
    docRoot.EmitCompact = false;
    console.log(docRoot.Emit());

}

chilkatExample();