WeakSethasbeginner

WeakSet.prototype.has() — added object

📖 Usage Example

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

has() returns true if the object is in the WeakSet.

WeakSet has()

ws.has(obj) returns true for an added object.

Challenge: Verify has() returns true.

💡 Hints (1)

8/20