Native js way to extend an object?

Question

Is there a native js way to extend an object such that the original object is modified?

eg

const obj = {a: 1}
const obj2 = {b: "bar"}

such that obj returns {a:1, b: "bar"}. Or is this impossible and an new object has to be created?

Answer 1

You can use Object.assign().

The Object.assign() method is used to copy the values of all enumerable own properties from one or more source objects to a target object.

const obj = { a: 1 };
const obj2 = { b: 'bar' };

Object.assign(obj, obj2);

console.log(obj);