Javascript Programming Tutorials, Guides & Best Practices

In this tutorial, we'll delve into advanced topics such as closures, asynchronous programming, object-oriented JavaScript, metaprogramming, and more. By the end of this tutorial, you'll have a comprehensive understanding of these concepts and be able to apply them to build more robust and efficient applications.

• What are Closures?
• Practical Uses of Closures
• Common Pitfalls with Closures

Closures are commonly used to create private variables, which are not accessible from outside the function:

function counter() {
    let count = 0;

    return function() {
        count++;
        console.log(count);
    };
}

const increment = counter();
increment();  // Output: 1
increment();  // Output: 2
increment();  // Output: 3