What are some advanced examples of JavaScript closures?

What are some advanced examples of JavaScript closures?

JavaScript closures are functions that remember their outer variables even when the function is executed outside its original scope. An advanced example is creating private variables. Would you like to see a code snippet?

Yes, please provide a code snippet!

Here's a simple example:

function makeCounter() {
    let count = 0;  // private variable
    return function() {
        count++;  // closure
        return count;
    };
}

const counter = makeCounter();
console.log(counter()); // 1
console.log(counter()); // 2

This creates a counter function that maintains its own private count variable.

That's great! Can you explain how this closure works?

Sure! The makeCounter function returns an inner function that has access to the count variable. Each time you call counter(), it increments count and returns the new value, demonstrating how closures can maintain state.