Simple Click Handler
    Reading an Input
    Validate Input
    Using Events
    Event Bubbling
    Event Bubbling Experiment
    addEventListener
    Creating Items with JS
Event Bubbling Experiment
<html>
    <head>
        <style>
            div:first-of-type {
                width: 200px;
                height: 200px;
                border: dashed 2px #777;
            }
            button {
                position: absolute; 
                bottom: 8px;
            }
        </style>
    </head>
    <body>
        <div onclick="console.log('div')">
            <!--Notice that even though the button is not physically overlapping the div, it still-->
            <!--triggers both click handlers. This is event bubbling in action-->
            <button onclick="console.log('button')">Click me</button>
        </div>
        <div onclick="console.log('div-2')">
        </div>
    </body>
</html>