Hello, and welcome to our exciting exploration of JavaScript's advanced event handling! Today, we'll discover how to manage webpage events proficiently. Specifically, we will look at Event Bubbling, stopPropagation, Event Delegation, and how to create and dispatch custom events.

Before we dive into these advanced topics, let's begin with a basic understanding of event handling in JavaScript.

In JavaScript, an event signals that something has happened on the webpage. This 'something' could be various user actions like a mouse click, movement of the mouse, pressing a key, etc., or it might be browser actions like page loading or a form submission.

Event handling refers to the process of setting up a function (an event handler) that runs when an event occurs. Here is a simple example for illustration:

In this example, clicking the button element triggers the onclick event, which runs the function to display an alert message.

Just like popping balloons at a 'party', Event Bubbling happens when an event propagates from an element up to its parent elements. Here's an example using a button nested inside a div: