Powers - JavaScript Cookbook

• Work with the JavaScript objects, such as String, Array, Number, and Math

• Create reusable objects

• Query and create new elements in the Document Object Model (DOM)

• Use the new Selectors API for efficient and targeted querying

• Use JavaScript with new HTML5 technologies, such as the new media elements, video and audio

• Create interactive applications

• Manage your web page space

• Store data in various ways, from the simple to the complex

• Use JavaScript with Scalable Vector Graphics (SVG) and the canvas element

• Work with some of the interesting data structures, like Microformats and RDFa

• Package your library for others to use, as well as use other libraries in your applications

• Ensure your JavaScript applications are accessible through the use of Accessible Rich Internet Applications (ARIA)

• Work in environments other than the typical desktop browser, such as creating mobile phone web applications, or extending Photoshop with new behaviors

• Use and create jQuery plug-ins

• Develop Ajax applications

• Debug your applications using your browsers debugger

• Work with the new HTML5 drag-and-drop

• Communicate using the new HTML5 cross-documentation techniques

• Implement concurrent programming with Web Workers

• Use the File API to access a desktop file directly in client-side JavaScript

Readers of this book should have some exposure to web development, and the use of JavaScript. In addition, the recipe format means Ill be focusing on specific tasks, rather than providing an overall general introduction. I wont cover every last aspect of a JavaScript topic, such as Strings. Instead, Ill focus on the more common tasks, or challenges, associated with the topic.

There will be lots of code, some of it in code snippets, some in full-page applications. The recipes are also cross-referenced, so if I mention a specific topic in one recipe that was covered in another, Ill include this information in the See Also section for the recipe. To assist you, Ive also created example code for all of the recipes that you can download and work with immediately.