Given an object, using the destructuring syntax you can extract just some values and put them into named variables:

const person = {
firstName: 'Tom',
lastName: 'Cruise',
actor: true,
}

const { firstName: name, age } = person //name: Tom, age: 54


name and age contain the desired values.

The syntax also works on arrays:

const a = [1, 2, 3, 4, 5]
const [first, second] = a


This statement creates 3 new variables by getting the items with index 0, 1, 4 from the array a:

const [first, second, , , fifth] = a