How to make an Object immutable in JavaScript

To make an object immutable, you can use Object.freeze() method. It prevents the modification of existing property values and prevents the addition of new properties.

const roadmap = {
  name: 'JavaScript',
};
 
Object.freeze(roadmap);
 
roadmap.name = 'JavaScript Roadmap'; // throws an error in strict mode
console.log(roadmap.name); // JavaScript