Why isnt this object destructuring working?

Question

The syntax looks to be right off of MDN, so I'm not understanding why this object destructuring isn't working. The variables return undefined, why?

  let obj={age: "3", name: "spike"};
  let {a,b}=obj;//returns a and b as undefined, why?

Answer 1

You need to use name and age as the variables that you destructure from the object like so:

let obj={age: "3", name: "spike"};
let {age, name}=obj;

console.log(age);
console.log(name);

Alternatively, you can assign new names to the destructured variables by using the following syntax:

let obj={age: "3", name: "spike"};
let {age: a, name: b}=obj;

console.log(a);
console.log(b);