JS Practice — Built-in Objects

Set delete() — size decreases

📖 Usage Example

const s = new Set([1, 2, 3])
s.delete(2)   // → true
s.delete(99)  // → false
console.log(s.size) // → 2

Use Set.delete() to remove a value; it returns true if the value existed.

Set.prototype.delete()

After a successful delete(), size decreases by 1.

Challenge: Verify that size decreases after delete().

💡 Hints (1)