Outstanding User Interfaces with Shiny provides the reader with necessary knowledge to develop beautiful and highly interactive user interfaces.It gives the minimum requirements in HTML/JavaScript and CSS to be able to extend already existing Shiny layouts or develop new templates from scratch.Suitable for anyone with some experience of Shiny, package development and software engineering best practices, this book is an ideal guide for graduates and professionals who wish to bring their app design to the next level. Key Features:Provides a survival kit in web development to seamlessly get started with HTML/CSS/JavaScriptLeverage CSS and Sass and higher-level tools like {bslib} to substantially enhance the design of your app in no timeA comprehensive guide to the {htmltools} package to seamlessly customize existing layoutsDescribes in detail how Shiny inputs work and how R and JavaScript communicateDetails all the necessary steps to create a production-grade custom template from scratch: packaging, shiny tags creation, validating and testing R components and JavaScriptExpose common web development debugging technicsProvides a list of existing templates, resources to get started and to explore