Closures are a fundamental part of JavaScript. If you've ever used a function within another function, you've used a closure.
Data Encapsulation
Closures allow us to create private variables that can only be accessed by specific functions. This is the basis for many design patterns in JavaScript.
Memory Considerations
While powerful, closures can lead to memory leaks if not used correctly. Understanding how the garbage collector handles closures is essential for writing efficient code.
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