Let’s continue exploring how we can use Unpoly.js with Twig to build a dynamic front-end for the Spacetraders game. In this article, we’ll look at advanced Unpoly.js techniques for consistent error handling and see how we can make forms update the current page without a reload. We’re not done with Twig! Let’s look at how to dynamically switch templates and use the embed tag to reuse HTML markup. Finally, we dive into what many back-end devs fear the most—UI design and Cascading Style Sheets. Fear Not! You’ll see the power of modern HTML and CSS features to simplify styling and improve the user experience. by Oscar Merida