WeakMaphasbeginner

WeakMap.prototype.has() — missing key

📖 Usage Example

const wm = new WeakMap()
const k = {}
wm.has(k)  // → false

has() returns false for keys that have never been added.

WeakMap has() Missing

wm.has(key) returns false when the key is absent.

Challenge: Verify has() returns false for a missing key.

💡 Hints (1)

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