Chapter 11. ECMAScript in VoiceXML

IN THIS CHAPTER

• Comments

• Variable Types

• User-Defined Objects

• Built-in Objects

• Operators

• Type Conversion

• Controlling Program Execution

• Summary

ECMAScript is a client-side scripting language supported by the VoiceXML language. ECMAScript is based on JavaScript 1.1. You have already seen examples of ECMAScript code in the bookstore application in variable declarations, expr attributes, and script elements.

Variables in VoiceXML are typed according to the ECMAScript specification. When used within an expr attribute, ECMAScript provides a mechanism for evaluating operations on variables of various types. When used within a script element, ECMAScript provides programmers with traditional programming ...

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