WeakMapintermediate

WeakMap — non-object key throws

📖 Usage Example

const wm = new WeakMap()
new WeakMap() === new WeakMap()  // → false

Each WeakMap() call creates a distinct new instance.

WeakMap Key Requirement

WeakMap keys must be objects. Passing a primitive throws a TypeError.

Challenge: Verify this throws.

💡 Hints (1)

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