Book Image

KnockoutJS by Example

By : Adnan Jaswal
Book Image

KnockoutJS by Example

By: Adnan Jaswal

Overview of this book

KnockoutJS By Example is a project-based guide that introduces the key features and concepts of knockout.js. It helps you create an application skeleton and a Hello World application. You will develop a To-Do list application that aims to show the basic features of knockout.js in action, such as data binding and observables, following which you will develop a dynamic online customer registration form that captures and validates customer information. This book will further walk you through developing a customer banking portal, which demonstrates the use of knockout.js with components such as navigation bars, tabs, carousels, master details view, panels, forms, and wizards. You will also discover how to use token-based authentication and authorization to secure the customer banking portal, and move on to creating an editable products grid with CRUD operations. Finally, you will explore how to use the Google Maps API with knockout.js. KnockoutJS By Example will not only leave you with a basic understanding of knockout.js fundamentals but also take you through some of the advanced features. It will help you get a web application up and ready instantly.
Table of Contents (17 chapters)
KnockoutJS by Example
Credits
About the Author
Acknowledgment
About the Reviewers
www.PacktPub.com
Preface
Index

Validating personal information


This user story is about validating that inputs for personal information in the form. The requirements are that all the fields for personal information are valid. In addition, the phone number should be a numeric with a minimum length of four and maximum length of nine. The e-mail should be of a valid e-mail syntax. The post code field for the postal address should be a numeric with a maximum length of four.

We will use the Knockout validation plugin to implement these requirements. You should be familiar with the Knockout validation plugin from Chapter 4, Adding Validation to the Customer Registration Form.

Let's start by making sure that we have included the Knockout validation plugin in our application. Open the view in bankportal.html and check whether the Knockout validation plugin is included in the HTML head. Download and include the plugin if it is not included already. The HTML head element should look similar to this:

<head>
  <meta http-equiv...