object assign

1const obj = { a: 1 };
2const copy = Object.assign({}, obj);
3console.log(copy); // { a: 1 }
4

1const target = { a: 1, b: 2 };
2const source = { b: 4, c: 5 };
3
4const returnedTarget = Object.assign(target, source);
5
6console.log(target);
7// expected output: Object { a: 1, b: 4, c: 5 }
8
9console.log(returnedTarget);
10// expected output: Object { a: 1, b: 4, c: 5 }
11

1'use strict';
2
3// Merge an object
4let first = {name: 'Tony'};
5let last = {lastName: 'Stark'};
6let person = Object.assign(first, last);
7ChromeSamples.log(person);
8// {name: 'Tony', lastName: 'Stark'}
9ChromeSamples.log(first);
10// first = {name: 'Tony', lastName: 'Stark'} as the target also changed
11
12// Merge multiple sources
13let a = Object.assign({foo: 0}, {bar: 1}, {baz: 2});
14ChromeSamples.log(a);
15// {foo: 0, bar: 1, baz: 2}
16
17// Merge and overwrite equal keys
18let b = Object.assign({foo: 0}, {foo: 1}, {foo: 2});
19ChromeSamples.log(b);
20// {foo: 2}
21
22// Clone an object
23let obj = {person: 'Thor Odinson'};
24let samp = {person: 'ashok'}; 
25let clone = Object.assign({}, obj, samp);
26ChromeSamples.log(clone);
27
28// {person: 'Thor Odinson'}

1The Object.assign() method copies all enumerable own properties from one or more source objects to a target object. It returns the target object.
2const target = { a: 1, b: 2 };
3const source = { b: 4, c: 5 };
4
5const returnedTarget = Object.assign(target, source);
6
7console.log(target);
8// expected output: Object { a: 1, b: 4, c: 5 }
9
10console.log(returnedTarget);
11// expected output: Object { a: 1, b: 4, c: 5 }

1const obj1 = {
2				a: 5,
3                b: 2
4                }
5const obj2 = Object.assign({a:6 d:7}, obj1);
6
7console.log(obj2);
8// output:  { a: 5 , b: 2, d:7}