9 comboboxes are styled using Sass. A combobox is an autocomplete input that proactively suggests options based on the user’s initial input. It allows you to filter a list of options and select from predefined options. The options appear alongside the input in a panel. Sass is a styling format that is compiled into CSS. It extends CSS with advanced features like scripting, mixins, and nesting. Sass is used to style 18 projects.