JS Practice — Built-in Objects

Set union() — non-overlapping

📖 Usage Example

const a = new Set([1, 2])
const b = new Set([2, 3])
const all = a.union(b)
console.log([...all]) // → [1, 2, 3]

Use Set.union() to combine two sets into a new set containing all unique values.

Set.prototype.union() (ES2025)

Union of disjoint Sets contains all elements from both.

Challenge: Verify union of Sets with no common elements.

💡 Hints (1)