Modal is a matrioshka language based on pattern-matching to rewrite trees

The linked article is about the modal approach, a technique used in web design and development to create interactive user interfaces. The article discusses the benefits of the modal approach, such as its ability to display additional content or functionality without navigating away from the current page. It also covers the implementation of modals, including the use of HTML, CSS, and JavaScript, and provides examples of how modals can be used effectively in web applications.