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DESIGNING A VALIDATOR APPLICATION - Pearsoncmg

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The document discusses the creation of responsive graphical user interfaces (GUIs) using AJAX for real-time user input validation. It emphasizes the importance of immediate feedback in data entry, showcasing how AJAX can enhance user experience by validating inputs like phone numbers, dates, and ZIP codes without requiring a full form submission. The chapter includes practical examples and code snippets for implementing validation functions, as well as a server-side script to verify ZIP codes against a database. Overall, it highlights the benefits of real-time validation in improving data accuracy and user interaction.

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