Lots of JavaScript developers use the Firebox extension to inspect HTML and modify the code in real time. You won’t need it at first, but it’ll come in handy as you progress.

How JavaScript Works For Ecommerce Sites When building an ecommerce site, developers use HTML for content and organization, CSS for design, and JavaScript for interaction with backend servers.

Always test your pages using Google’s own tools and third-party resources to view the rendered HTML to make sure all your content is showing up.