From the Back Cover
Zeroes in on new and emerging APIs such as the Selectors API, Web Workers, and Cross-Document Messaging
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
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