JavaScript Demo: Expressions

const Employee = {
  firstname: 'John',
  lastname: 'Doe'
}

console.log(Employee.firstname);
// expected output: "John"

delete Employee.firstname;

console.log(Employee.firstname);
// expected output: undefined

JavaScript Demo: Expressions - delete operator

​x
const Employee = {
  firstname: 'John',
  lastname: 'Doe'
}
​
console.log(Employee.firstname);
// expected output: "John"
​
delete Employee.firstname;
​
console.log(Employee.firstname);
// expected output: undefined
​