The flatMap() method is a versatile tool in JavaScript, combining map() and flat() to handle and flatten nested arrays seamlessly, making code cleaner and more efficient.
Using symbols as keys in WeakMap enhances memory efficiency since weak references automatically allow for garbage collection when the object isn't in use, preventing memory leaks.
Promise.allSettled() is crucial for modern JavaScript programming, as it provides a convenient way to handle multiple promises simultaneously, gathering all completion outcomes irrespective of success or failure.
Custom behavior in JavaScript can be easily achieved with proxies, which allow developers to define specific actions for fundamental operations, thus facilitating enhanced control over objects.
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