What are some practical examples of using WeakMap in JavaScript?

Can you give me some practical examples of using WeakMap in JavaScript?

Sure! WeakMap is a collection of key-value pairs where keys are objects and values can be any data type. One practical example is caching data associated with DOM elements.

How does WeakMap help with memory management?

WeakMap allows for garbage collection of keys when there are no other references to them, preventing memory leaks.

Can you show me a code snippet using WeakMap?

Absolutely! Here's a simple example:

const weakMap = new WeakMap();
const obj = {};
weakMap.set(obj, 'some value');
console.log(weakMap.get(obj)); // Output: 'some value'

What are the limitations of using WeakMap?

WeakMap keys must be objects, and you cannot iterate over a WeakMap or get its size.