(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
    }
}

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 json = new chilkat.JsonObject();

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

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

    // Get the "abc" object.
    // abcObj: JsonObject
    var abcObj = json.ObjectOf("abc");
    if (json.LastMethodSuccess == false) {
        console.log("abc object not found.");
        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
    // xArray: JsonArray
    var xArray = abcObj.ArrayOf("x");
    // We'll skip the null check and assume it's non-null...

    // Navigate to the 2nd object contained within the array.  This contains members b1 and b2
    // bObj: JsonObject
    var bObj = xArray.ObjectAt(1);
    // We'll skip the null check and assume it's non-null...

    // 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:
    // docRoot: JsonObject
    var docRoot = bObj.GetDocRoot();
    // 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();