Get specific value from a Nested JSON using Node.js

I am totally new to Node.JS. I have written the Node.JS code and getting the response in JSON file. The JSON is in Nested Format. I want to get, store in a variable and print only one value inside the Nested JSON.

Code:

var https = require('https');
var optionget = {
 host : 'api-dev.dataoverflow.com',
 port : 443,
 path : '/test1/test2/MR0000091/benifits?latency=RTIME',
 method : 'GET',
 HEADERS: {
  'Authorization' : 'Basic Qjrfrfhurhfurhjfr2839gbfwj==',
  'X-PruAppID : 'PlainCardPortal'
  }
 };

console.info(optionsget)

var reqGet = htttps.request(optionsget, function(res) {
console.log("statusCode: ", res.statusCode);
res.on('data', function(d) {
process.stdout.write(d);
});
});

reqGet.end();
reqGet.on('error', function(e) {
console.error(e);
});

var optionsgetmsg = {
 host : 'api-dev.dataoverflow.com',
 port : 443,
 method : 'GET'
};

console.info(optionsgetmsg);

var reqGet = https.request(optionsget, function(res) {
console.log("statusCode: ", res.statusCode);
res.setEncoding('utf-8')

    res.on('data', function(data) {
        process.stdout.write(data);
    });
});

reqGet.end();
reqGet.on('error', function(e) {
 console.error(e);
});

Getting the whole JSON:

{
    "id": "0001",
    "type": "donut",
    "name": "Cake",
    "image":
        {
            "url": "images/0001.jpg",
            "width": 200,
            "height": 200
        },
    "thumbnail":
        {
            "url": "images/thumbnails/0001.jpg",
            "width": 32,
            "height": 32
        }
}

I want to get the width=32 only which is under thumbnail. I want to store it in a variable and want to print in console.

You can use JSON.parse() in order to convert your JSON string into an object, and then you can retrieve your value as you would a regular JS object like this:

let parsedData = JSON.parse(data)
process.stdout.write(console.log(parsedData.image.url)

Parsing nested JSON in Nodejs, As @smarx explained in the comments, this answer is not suitable for direct access to the specific property by index due to Object.keys is unordered, so it is only for cases, var obj = JSON.parse(string); var keysArray = Object.keys(obj); for (var i = 0; For nested property value you have to use . operator. Collaborating JSON files with Node.js makes it simple to ensure that the information can be easily accessed by the users. Continue going through this post to learn the method of using JSON files in Node.js. What is JSON? Before proceeding ahead, let me brief you on what exactly is JSON (JavaScript Object Notation).

You can do something like

res.on('data', (d) => {
  var jsonObj = JSON.parse(d);
  console.log('width = ', jsonObj.thumbnail.width);
});

JSON.parse() will transform the received string in d to a JavaScript object. You then can access the object via standard dot notation.

how to access nested json object value in javascript Code Example, Get code examples like "how to access nested json object value in javascript" Programa��o web com Node e Express Beneficiando-se da stack Angular Quick Tip: Binding Specific Keys to the Keyup and Keydown Events� JSON objects are surrounded by curly braces {}. JSON objects are written in key/value pairs. Keys must be strings, and values must be a valid JSON data type (string, number, object, array, boolean or null). Keys and values are separated by a colon. Each key/value pair is separated by a comma.

Parse the string using JSON.parse(...). The object is then a standard JavaScript object. You can access it using either dot notation (e.g. object.property) or via index notation (e.g. object['property'])

You can also nest those, such as in your example, data.thumbnail.width

res.on('data', (d) => {
    let data = JSON.parse(d);
    let width = data.thumbnail.width;
    console.log(width);
});

However, if thumbnail could possibly be undefined, you should check for that.

res.on('data', (d) => {
    let data = JSON.parse(d);
    let width = undefined;
    if (data.thumbnail) width = data.thumbnail.width;
    console.log(width);
});

How to access nested json objects in JavaScript?, Accessing nested json objects is just like accessing nested arrays. Nested objects are the objects that are inside an another object.In the� Recently I started learning and working on Node.js platform. So, now I am again brushing up my long forgotten JavaScript skill. JSON is a common format you face every now and then in JavaScript, whether its client side or server side.

Use npm request

var request = require('request');

var options = {
    url: 'api-dev.dataoverflow.com:443/test1/test2/MR0000091/benifits?latency=RTIME',
    headers: {
        'Authorization': 'Basic Qjrfrfhurhfurhjfr2839gbfwj==',
        'X-PruAppID': 'PlainCardPortal'
    }
};

function callback(error, response, body) {
    if (!error && response.statusCode == 200) {
        console.log(body);
    }
}

request(options, callback);

JavaScript JSON Parsing, In JSON, property names or keys are always strings, while the value can be a string If the given string is not valid JSON, you will get a syntax error. will show you how to parse a nested JSON object and extract all the values in JavaScript. An easy way of accessing the nested elements can be found on the answer of following thread (Accessing nested data structures). A nested data structure is an array or object which refers to other arrays or objects, i.e. its values are arrays or objects. Such structures can be accessed by consecutively applying dot or bracket notation.

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nested-keys, Description. Use property paths like 'a.b.c' to get a nested value from an object. Even works when keys have dots in them (no other dot-prop library can do this!) How to parse JSON from a string, and how to read a JSON file in Node.js Published Aug 07, 2018 If you have JSON data as part of a string, the best way to parse it is by using the JSON.parse method that’s part of the JavaScript standard since ECMAScript 5, and it’s provided by V8 , the JavaScript engine that powers Node.js .

Query nested JSON array for specific keys only in Nodejs, Query nested JSON array for specific keys only in Nodejs - json. _.get(rec, ' name').match(/\bgraham\b/i)) .map(extract_fields) .value() console.log(results) will� Arrays in JSON are almost the same as arrays in JavaScript. In JSON, array values must be of type string, number, object, array, boolean or null. In JavaScript, array values can be all of the above, plus any other valid JavaScript expression, including functions, dates, and undefined.

Comments
  • htttps.request Is this normal ?