JavaScript is a highly capable programming language, but it wasn't designed to handle the rigorous demands of large-scale web applications. Dart is a new programming language created by Google to provide a better experience for developers and to address some of JavaScript's shortcomings. Dart in Action begins with a rapid overview of the Dart language and provides techniques and examples showing how to use it as a viable replacement for Java and JavaScript in browser-based desktop and mobile applications. It covers core features such as interacting with the browser, optional typing, classes, libraries, and concurrency with isolates. The book also includes advanced concepts that will allow readers to run Dart on the server and create "single page" HTML5 web applications. AUDIENCE This book is intended for Java and JavaScript developers, but those from a traditional object-orientated language background will also find this book can make them more productive using this exciting new language. ABOUT THE TECHNOLOGY Dart is a new open-source structured programming language for creating complex browser-based web applications. It has tools to help the developer organize code and makes developing in a team of people much easier than the current browser technologies such as JavaScript.