Example - Simple Click Handler

Simple Click Handler

<html>
    <head></head>
    <body>
        <h1 id="heading">This is an HTML site</h1>
        <button onclick="changeTitle()">Click Me</button>
        <script>
            const heading = document.getElementById("heading");
            function changeTitle() {
                heading.innerText = 
                    heading.innerText.replace("an HTML", "a JavaScript")
            }
        </script>
    </body>
</html>