Renaming variables while destructuring

Destructuring allows us to refer to one key in an object, but declare it as a variable with a different name. The syntax looks like the key-value syntax for a normal JavaScript object.

let user = {
  name: 'John Smith',
  id: 10,
  email: 'johns@workcorp.com',
};

let {user: userName, id: userId} = user;

console.log(userName) // John Smith
console.log(userId) // 10