You can remove properties (fields) from the JavaScript objects using the delete keyword.

const user = {
  name: 'John',
  age: '25',
  isLearning: true

delete user.age;
delete user['isLearning'];

console.log(;  // John
console.log(user.age);  // undefined
console.log(user.isLearning);  // undefined

In the example above I’ve deleted two fields from the JS object. Then I logged them to the console to make sure these fields are evaluated to undefined.