Synopsis :
JavaScript is loosely based on Java, which is an object-oriented programming language that became popular for use on the Web by way of embedded applets. It has a similar syntax and programming methodology to Java, however, it should not be considered the "light" version of the language. JavaScript is its own language that found its home in web browsers around the world and enabled enhanced user interaction on websites as well as web applications. In this book JavaScript is covered from its beginning in the earliest Netscape browsers to the present-day versions that can support the DOM and Ajax. You will learn how to extend the language to suit specific needs and how to create client-server communications without intermediaries such as Java or hidden frames. You will also learn how to apply JavaScript solutions to business problems faced by web developers everywhere. This book provides a developer-level introduction along with more advanced and useful features of JavaScript. The book begins by exploring how JavaScript originated and evolved into what it is today.There is a discussion of the components that make up a JavaScript implementation that follows that has a specific focus on standards such as ECMAScript and the Document Object Model (DOM). The differences in JavaScript implementations used in different popular web browsers are also discussed. After building a strong base, the book goes on to cover basic concepts of JavaScript including its version of object-oriented programming, inheritance, and its use in HTML. The book then explores new APIs, such as HTML5, the Selectors API, and the File API. The last part of the book is focused on advanced topics including performance/memory optimization, best practices, and a look at Where JavaScript is going in the future. The book is broken up into 25 chapters. Chapter 1 explains the origins of JavaScript including where it came from, how it evolved, and what it is today. Chapter 2 examines how JavaScript is used in
Quatrième de couverture:
Get up to date on the latest ways to use JavaScript in web development If you want to achieve JavaScript′s full potential, it is critical to understand its nature, history, and limitations. To that end, this updated version of the bestseller by veteran author and JavaScript guru Nicholas C. Zakas covers JavaScript from its very beginning to the present–day incarnations including the DOM, Ajax, and HTML5. Zakas shows you how to extend this powerful language to meet specific needs and create dynamic user interfaces for the web that blur the line between desktop and internet. By the end of the book, you′ll have a strong understanding of the significant advances in web development as they relate to JavaScript so that you can apply them to your next website. Professional JavaScript for Web Developers : Offers a detailed discussion of the components that make up a JavaScript implementation Zeroes in on new and emerging APIs such as the Selectors API, Web Workers, and Cross–Document Messaging Explores object–oriented programming in JavaScript Shows how to implement drag and drop file upload with Ajax and the File API Highlights the new core language features introduced in ECMAScript5 Explains how to work with data formats such as XML and JSON Looks at what′s coming in ECMAScript Harmony Walks you through creating offline–capable web applications wrox.com Programmer Forums Join our Programmer to Programmer forums to ask and answer programming questions about this book, join discussions on the hottest topics in the industry, and connect with fellow programmers from around the world. Code Downloads Take advantage of free code samples from this book, as well as code samples from hundreds of other books, all ready to use. Read More Find articles, ebooks, sample chapters, and tables of contents for hundreds of books, and more reference resources on programming topics that matter to you. Wrox Professional guides are written by working developers to address everyday needs. They provide examples, practical solutions, and expert education in new technologies, all designed to help programmers do a better job.
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