WeakMap.prototype.delete()

delete() 메소드는 WeakMap 객체의 특정 요소를 제거합니다.

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wm.delete(key);

key

WeakMap 객체에서 제거할 요소의 키.

WeakMap 객체의 요소가 성공적으로 제거되면 true, 키를 찾을 수 없거나 키가 객체가 아닌 경우 false.

var 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.

• WeakMap