Question

Views

How do you add a field to a json in javascript? I've seen it done with arrays but I need it with a JSON field.

So basically

{
   "hello":"this is cool"
}

into

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

about 4 years ago · Juan Pablo Isaza

Answer question

Answer 1 · 2022-07-03T08:27:57.287Z

You can do it like so

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

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

console.log(json);

If JSON is a string you can use JSON.parse() as per MDN web docs JSON.parse().

Answer 2 · 2022-07-03T08:27:57.297Z

If you want to do it to JSON, then you can do it like below.

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

const obj = JSON.parse(json);
obj.website = "Stack Overflow";

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

However, if you want to do it to a regular object, just simply run the code below.

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

obj.website = "Stack Overflow";
console.log(obj);