WeakSetaddintermediate

WeakSet.prototype.add() — chaining

📖 Usage Example

const ws = new WeakSet()
const fn = () => {}
ws.add(fn)
ws.has(fn)  // → true

Functions are objects and can be stored in a WeakSet.

WeakSet add() Chain

Because add() returns the set, you can chain multiple adds.

Challenge: Verify chained adds work.

💡 Hints (1)

18/20