# Introduction HTML Event Attributes are used to add functionality to HTML elements. When a certain event occurs, such as a user clicking on a button or submitting a form, JavaScript code can be executed. In this lab, you will learn how to use HTML Event Attributes to add interactivity to your web pages. > Note: You can practice coding in `index.html` and learn [How to Write HTML in Visual Studio Code](https://code.visualstudio.com/docs/languages/html). Please click on 'Go Live' in the bottom right corner to run the web service on port 8080. Then, you can refresh the **Web 8080** Tab to preview the web page.
Click the virtual machine below to start practicing