What is `WeakMap` in JavaScript and how does it differ from `Map`?

JavaScript Associate Medium

JavaScript Associate — Medium

What is `WeakMap` in JavaScript and how does it differ from `Map`?

Key points

  • WeakMap allows for efficient memory management by releasing keys when no longer needed
  • Map retains keys even when not in use, impacting memory usage
  • WeakMap is ideal for scenarios where keys are temporary or short-lived

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