Book Image

HTML5 Data and Services Cookbook

Book Image

HTML5 Data and Services Cookbook

Overview of this book

HTML5 is everywhere. From PCs to tablets to smartphones and even TVs, the web is the most ubiquitous application platform and information medium bar. Its becoming a first class citizen in established operating systems such as Microsoft Windows 8 as well as the primary platform of new operating systems such as Google Chrome OS. "HTML5 Data and Services Cookbook" contains over 100 recipes explaining how to utilize modern features and techniques when building websites or web applications. This book will help you to explore the full power of HTML5 - from number rounding to advanced graphics to real-time data binding. "HTML5 Data and Services Cookbook" starts with the display of text and related data. Then you will be guided through graphs and animated visualizations followed by input and input controls. Data serialization, validation and communication with the server as well as modern frameworks with advanced features like automatic data binding and server communication will also be covered in detail.This book covers a fast track into new libraries and features that are part of HTML5!
Table of Contents (21 chapters)
HTML5 Data and Services Cookbook
About the Authors
About the Reviewers

Validating US zip codes

Validating zip codes at the client side can be useful on web pages with address forms.

Entering numbers is an error-prone process. It would be great for the user if we could provide some kind of basic immediate validation to inform them of a possible error in their data entry.

On the other hand, a satisfyingly complete zip code database has a non-trivial size. Loading the complete database at the client side might be difficult and non-optimal.

In this recipe, we're going to write a client-side zip code validation function. In the process, we're going to learn what it takes to convert a non-trivial zip code database to a smaller representation which can be loaded at the client side.

Getting ready

Let's download the zip code database file first. The website provides a free zip code database in a CSV format (

We're going to extract a smaller database from this file which can be loaded at the client...