What are the differences between WeakMaps and StrongMaps in JavaScript?
WeakMaps and StrongMaps are both collections for storing key-value pairs, but they handle memory differently. WeakMaps allow garbage collection of keys if there are no other references to them, while StrongMaps keep strong references, preventing garbage collection.
Can you give me an example of when to use WeakMap?
Sure! Use WeakMap when you want to associate data with an object without preventing that object from being garbage collected. For instance, if you want to store metadata about DOM elements.
What are the performance implications of using WeakMaps?
WeakMaps can be more memory efficient since they allow for garbage collection of keys. However, they may have slightly slower access times compared to StrongMaps due to their weak references.
Are there any limitations to using WeakMaps?
Yes, WeakMaps only accept objects as keys and do not have methods like size or clear, which are available in StrongMaps.
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