Iterator: destructuring basic

const [a, b, c] = [1, 2, 3]
console.log(a, b, c) // → 1 2 3
const [head, ...tail] = [10, 20, 30]
console.log(head, tail) // → 10 [20, 30]

Destructuring uses the iterator protocol to unpack values from an iterable into distinct variables.