KnockoutJS by Example

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 ...