<ul><li>ES2015 introduced new data structures like WeakMap and WeakSet alongside Map and Set.</li><li>WeakMaps provide a way to store keys weakly, allowing values to be garbage collected when key references are lost.</li><li>Before the introduction of maps, JavaScript objects were primarily used for key-value storage.</li><li>Objects in JavaScript can only have string keys, limiting the types of keys that can be used.</li><li>Maps allow the storage of non-string keys in objects, offering more flexibility than objects.</li><li>WeakMaps are beneficial for scenarios where extending objects without memory leaks is essential.</li><li>Use cases for WeakMaps include keeping private data, tracking library objects, and managing data for a small set of objects efficiently.</li><li>While WeakMaps have limitations compared to regular maps, they are valuable for scenarios requiring object extension without memory leaks.</li><li>Benjamin Gruenbaum is the author of this post and is involved in various open-source projects related to JavaScript.</li><li>Overall, WeakMaps are recommended for specific scenarios where maintaining object references without memory leaks is crucial.</li></ul>

WeakMap Weakness

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