create a user interface website using visual studio, css$,$ html$,$ and pure JavaScript. It should be able to implement functionality where clicking on buttons triggers specific actions such as displaying$/$hiding content, toggling classes, or making API requests. Utilize built$-$in browser APIs such as $`$localStorage$`$ or $`$sessionStorage$`$ for storing and

retrieving data locally. Integrate an external API $($e$.$g$.,$ RESTful API$)$ to fetch data dynamically and display the data.