js merge object spread operator create double code example

Example 1: merge properties of object typescript

const target = { a: 1, b: 2 };
const source = { b: 4, c: 5 };
// Copies source to target object without changing
// target object instance
const returnedTarget = Object.assign(target, source);

Example 2: spread operator merge objects

let a = {
    a: 1,
    b: true
}

let b = {
	y: 093,
	z: 'This is an object'
}

const c = {...a, ...b}