Appending a property to a JSON object using JavaScript

What is the method for adding a new field to a JSON object in JavaScript? I have seen examples using arrays, but I specifically need it with a JSON object.

Essentially, how can I transform this:

{
   "hello":"this is cool"
}

into this:

{
   "hello":"this is cool",
   "hi":"i know"
}

Answer №1

Here's a way to accomplish it

const json = {
   "hello":"this is cool"
};

json['hi'] = "i know";

console.log(json);

To convert JSON from a string, you can utilize the JSON.parse() method as described in MDN web docs JSON.parse().

Answer №2

If you're looking to manipulate JSON data, the following code snippet shows how:

let json = `{
  "key": "value"
}`;

const obj = JSON.parse(json);
obj.website = "Tech world";

json = JSON.stringify(obj);
console.log(json);

On the other hand, if you want to work with a standard object, use the code below:

const obj = {
  key: "value",
};

obj.website = "Tech World";
console.log(obj);

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