Name: Declaration using const vs freeze in Javascript
Rating: 1.3 (3065 reviews)
Author: alishgiri

Declaration using const vs freeze in Javascript

Alish Giri - Aug 11 -

Javascript const

Using const we can still modify the contents of a Javascript objects but the reference to this object will be immutable.

const product = {name: "Sugar", weight: "1 kg"};
product.name = "Some New Name";

console.log(product);

{
  name: "Some New Name",
  weight: "1 kg"
}

Using freeze is preferred in cases where we do not want to modify the contents of an object.

const product = {name: "Sugar", weight: "1 kg"};
Object.freeze(product);
product.name = "Some New Name";

console.log(product);

{
  name: "Sugar",
  weight: "1 kg"
}