What is pass by Value and Pass by reference in JavaScript

Pass by value works with primitive data type

let a = 5;
let b = a;
b= b+5;
console.log(a);//5
console.log(b);//10

Pass by Refnrece Used in non Primitve::

const obj1 = {
user:"jigar",
pass:"pass"
}

const obj2= obj1;

obj2.pass = 'dd';

console.log(obj1);//{user: 'jigar', pass: 'dd'}
console.log(obj2);//{user: 'jigar', pass: 'dd'}