How to add JSON object to another JSON object in JavaScript | Example code

Use Spread syntax to add JSON object to another JSON object in JavaScript. And use the push() method to add a JSON array at end of an array.

let combined = { …obj1, …obj2 };

Or if JSON array

obj.push(myObj);

Add JSON object to another JSON object in JavaScript

Simple example code use the object spread syntax:

<!DOCTYPE html>
<html>
<body>

  <script type="text/javascript">
    const original = {
      "product": {
        "prodId": "PROD100"
      },
      "pkgs": {
        "pkgId": "PKG137"
      },
      "discount": "50",
      "pFrom": null,
      "pTo": null,
      "amt": "599",
      "isActive": "false"
    }


    const toAppend = {
      "customer": {
        "custId": "CUST1002"
      },
    }
    const newJSON = { ...toAppend, ...original };
    console.log(newJSON);
  </script>

</body>
</html>

Output:

How to add JSON object to another JSON object in JavaScript

Add json object to JSON Array

  <script type="text/javascript">
    favorites = [{
      "artist" : "ABC",    
      "song_name" : "Mild"  
    }];


    var myObj = {
      "artist" : "XYZ",    
      "song_name" : "Rock"  
    };

    favorites.push(myObj);

    console.log(favorites);
  </script>

Output:

Add json object to JSON Array JavaScript

How do I add JSON objects as a new level to another JSON object?

Answer: code that gets in the end collection of two JSON objects, something like this.

var jsonL1 = {"holder1": {}}
var jsonL2 = {"section":"0 6","date":"11/12/13"}

Just do this

L1.holder1 = L2

Do comment if you have any doubts or suggestions on this Js JSON topic.

Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.

OS: Windows 10

Code: HTML 5 Version

1 thought on “How to add JSON object to another JSON object in JavaScript | Example code”

  1. hi,
    I need to club the below
    var jsonObject1={
    “Item1”:{
    }
    }
    var jsonObject2={
    “Item2”:{
    }
    }
    var jsonObject3= need to append jsonObject1 and jsonObject2
    I expect
    jsonObject3={
    “Item1”:{
    },
    “Item2”:{
    }

    }
    Appreciate your help.

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