Programming Development Tutorials, Guides & Insights

JavaScript can respond to user actions (events) such as clicking a button, typing in a text box, or submitting a form.

<button id="alertButton">Click Me</button>

<script>
document.getElementById('alertButton').addEventListener('click', function() {
    alert('Button clicked!');
});
</script>

In this example, the createCounter function creates a closure that keeps track of the count variable. The returned object allows you to increment, decrement, and get the current value of count without exposing the variable directly.

While closures are incredibly useful, they can also lead to some common pitfalls if not used carefully: