WeakSethasbeginner

WeakSet.prototype.has() — constructor-initialized

📖 Usage Example

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

Use has() to guard operations that should only run once per object.

WeakSet has() After Constructor Init

Objects passed to the constructor are present immediately.

Challenge: Verify has() for constructor-initialized objects.

💡 Hints (1)

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