JS Practice — Built-in Objects

Set keys() — insertion order

📖 Usage Example

const s = new Set([1, 2, 3])
for (const k of s.keys()) {
  console.log(k) // 1, 2, 3
}

Use Set.keys() to iterate over the values of a set (identical to values()).

Set.prototype.keys()

keys() yields values in insertion order.

Challenge: Verify that keys() preserves insertion order.

💡 Hints (1)