JS Built-ins
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Setunionintermediate

Set union() — combined size

📖 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)

setA.union(setB) returns a new Set with all elements from both Sets.

Challenge: Verify the size of the union.

💡 Hints (1)
  • • union() returns a new Set containing all elements from both Sets