Baseline Widely available
The delete() method of WeakMap instances removes the specified element from this WeakMap.
const weakmap1 = new WeakMap();
const object1 = {};
weakmap1.set(object1, 42);
console.log(weakmap1.delete(object1));
// Expected output: true
console.log(weakmap1.has(object1));
// Expected output: false
weakMapInstance.delete(key)
key
The key of the element to remove from the WeakMap object.
true if an element in the WeakMap object has been removed successfully. false if the key is not found in the WeakMap. Always returns false if key is not an object or a non-registered symbol.
const wm = new WeakMap();
wm.set(window, "foo");
wm.delete(window); // Returns true. Successfully removed.
wm.has(window); // Returns false. The window object is no longer in the WeakMap.
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