how to clone object in javascript code example

Example 1: clone object in js

var student = {name: "Rahul", age: "16", hobby: "football"};

//using ES6
var studentCopy1 = Object.assign({}, student);
//using spread syntax
var studentCopy2 = {...student}; 
//Fast cloning with data loss
var studentCopy3 = JSON.parse(JSON.stringify(student));

Example 2: clone javascript object

let clone = Object.assign({}, objToClone);

Example 3: javascript clone object

var x = {myProp: "value"};
var xClone = Object.assign({}, x);

//Obs: nested objects are still copied as reference.

Example 4: javascript clone object

let clone = Object.create(Object.getPrototypeOf(obj), Object.getOwnPropertyDescriptors(obj));

Example 5: best way to clone an object in javascript

const person = {
    firstName: 'John',
    lastName: 'Doe'
};


// using spread ...
let p1 = {
    ...person
};

// using  Object.assign() method
let p2 = Object.assign({}, person);

// using JSON
let p3 = JSON.parse(JSON.stringify(person));

Example 6: javascript clone object

// syntax: let <newObjectName> = {...<initialObjectName>};

// example: 
const me = {
  name: 'Jakes',
  age: 30,
};
const friend = {...me};
friend.age = 27;
console.log(friend.age); // 27
console.log(me.age); // 30

// -----------------------------
//  BAD
// -----------------------------
const me = {
  name: 'Jonas',
  age: 30,
};
const friend = me;
friend.age = 27;
console.log(friend.age); // 27
console.log(me.age); // 30