What will be the output of the following code?

var Employee = {
  company: 'xyz'
}
var emp1 = Object.create(Employee);
delete emp1.company
console.log(emp1.company);

Above code will output xyz as output. Here emp1 object got company as prototype property. delete operator doesn’t delete prototype property.

emp1 object doesn’t have company as its own property. You can test it like:

console.log(emp1.hasOwnProperty('company')); //output : false

However, we can delete company property directly from Employee object using delete Employee.company or we can also delete from emp1 object using __proto__ property delete emp1.__proto__.company.