JS Practice — Built-in Objects

Set isSupersetOf() — superset is true

📖 Usage Example

const a = new Set([1, 2, 3])
const b = new Set([1, 2])
a.isSupersetOf(b)   // → true
b.isSupersetOf(a)   // → false

Use Set.isSupersetOf() to check whether a set contains all elements of another set.

Set.prototype.isSupersetOf() (ES2025)

setA.isSupersetOf(setB) returns true if all elements of B are in A.

Challenge: Verify that a superset returns true.

💡 Hints (1)