Object.freeze
Object.freeze allows us to disable object mutation.let movie1 = {
name: 'Star Wars',
episode: 7
};
let movie2 = Object.freeze(Object.assign({}, movie1));
movie2.episode = 8; // fails silently in non-strict mode,
// throws error in strict mode
console.log(movie1.episode); // writes 7
console.log(movie2.episode); // writes 7
Last modified 2yr ago