Answers for "javascript copy by value"

4

clone javascript object

let clone = Object.assign({}, objToClone);
Posted by: Guest on February-19-2020
8

copy object javascript

// es6
const obj = {name: 'john', surname: 'smith'};
const objCopy = {...obj};
Posted by: Guest on April-09-2020
7

copy object javascript

var x = {key: 'value'}
var y = JSON.parse(JSON.stringify(x))

//this method actually creates a reference-free version of the object, unlike the other methods
//If you do not use Dates, functions, undefined, regExp or Infinity within your object
Posted by: Guest on May-22-2020
1

javascript clone object

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

//Obs: nested objects are still copied as reference.
Posted by: Guest on April-27-2020
0

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));
Posted by: Guest on November-04-2020
2

mdn object assign

The Object.assign() method copies all enumerable own properties from one or more source objects to a target object. It returns the target object.
const target = { a: 1, b: 2 };
const source = { b: 4, c: 5 };

const returnedTarget = Object.assign(target, source);

console.log(target);
// expected output: Object { a: 1, b: 4, c: 5 }

console.log(returnedTarget);
// expected output: Object { a: 1, b: 4, c: 5 }
Posted by: Guest on July-07-2020

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