Is there a way to add multiple properties into an object?

Question

For example given

const a = {
  "a": 1,
  "b": "hi",
}

const c = "54"
const d = "66"

I want a to be

a = {
  "a": 1,
  "b": "hi",
  "c": 54,
  "d": 66,
}

I want to do it in a single line so

 a = {c, d}

But the above code will get rid of a, b. Any quick way to accomplish this?

`a = Object.assign(a, { c, d });` should do the job. @VLAZ wops, didn't notice you did answer there already :) — briosheje, Jun 23 '20 at 06:58
as mentioned already, spread operator is the shortest way a = {...a, c, d} — vlad katz, Jun 23 '20 at 07:00
@VLAZ sounds like an ans... A comment, indeed.... Of a.. likely.. duplicate question, but that's fine. I see you're a man of culture as well. — briosheje, Jun 23 '20 at 07:03
Speaking about spread, I have a better question :) whats wrong about this: `const args = { options, ...defaultArgs }` ? — Son Nguyen, Jun 23 '20 at 07:15

score 3 · Accepted Answer · answered Jun 23 '20 at 06:58

3

Spread syntax

const a = {
    a: 1,
    b: 'hi',
};

const c = '54';
const d = '66';

console.log({ ...a, c, d });

answered Jun 23 '20 at 06:58

Nikita Madeev

4,284
9
20

score 0 · Answer 2 · answered Jun 23 '20 at 06:59

0

One way is to use Object.assign:

a = Object.assign({}, a, { c, d });

This effectively creates a new object ({}), then it copies all properties from your initial object (a) then it copies the new properties ({c, d }).

answered Jun 23 '20 at 06:59

Ovidiu Dolha

5,335
1
21
30

Is there a way to add multiple properties into an object?

2 Answers2