Object destructuring is one of the powerful features introduced by ES6. Instead of writing multiple lines of code, we can simply assign the object to the variables as shown below.

let user = { firstName: "foo", lastName: "bar", 
	     age: 27, junk: "bla"};

// Assigning to variables
let {firstName, age} = user;
let {firstName : f, age : a} = user;

console.log(`${f}'s age: ${a}`);
console.log(`${firstName}'s age: ${age}`);	// above and this line yields same result


// Using methods
function displayUserAge({firstName, age}){
	console.log(`${firstName}'s age: ${age}`);
}

displayUserAge(user);

Run here