JavaScript Object.assign() Method

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. Objects are assigned and copied by reference. It will return the target object.

Syntax:

Parameter

target: The target object.

sources: The source object(s).

Return value:

This method returns the target object.

Browser Support:

Chrome	Yes
Edge	Yes
Firefox	Yes
Opera	No

Example 1

const object1 = {
  a: 1,
  b: 2,
  c: 3
};
const object3= {
  g: 1,
  h: 2,
  i: 3
};	

const object2 = Object.assign({c: 4, d: 5}, object1);
const object4 = Object.assign({g: 34, h: 25}, object3);
console.log(object2.c, object2.d);
console.log(object4.g, object4.h);

Output:

Example 2

const object1 = {
  a: 11,
  b: 12,
  c: 33
};

const object2 = Object.assign({c: 4, d: 5}, object1);
console.log(object2.c, object2.d);

Output:

33 
5

Example 3

const object1 = {
  a: 1,
  b: 2,
  c: 3
};

const object2 = Object.assign({a: 3,c: 4, d: 5,g: 23,}, object1);

console.log(object2.c, object2.d,object2.g,object2.a);

Output: