Deep Copy and Shallow Copy in JavaScript

Deep Copy :

When we are creating a copy of variable, if we make changes in a new copy of a variable and it does not affect original value of variable.

Shallow Copy :

When we are creating a copy of variable, if we make changes in a new copy of a variable and it affect the original value of variable .

const person =
{
name : 'Harry',
address : {
country: 'nepal',
city: 'butwal'
}
}
// const updated ={name: person.name, address: {...person.address}}
const updated = {
       ...person,
       address :{
       ...person.address
        }
}
updated.name = "Bijay"
updated.address.city= 'kathamandu'
console.log(person)
console.log(updated)
//person
{name : "Harry"
address: {country: 'nepal', city: 'butwal'}
}
//updated
{name : "Bijay"
address: {country: 'nepal', city: 'Kathmandu'}
}