How can I conditionally require form inputs with AngularJS?

Question

Suppose we\'re building an address book application (contrived example) with AngularJS.

We have a form for contacts that has inputs for email and phone number, and w

Answer 1

There's no need to write a custom directive. Angular's documentation is good but not complete. In fact, there is a directive called ngRequired, that takes an Angular expression.

Here's a more complete example: http://jsfiddle.net/uptnx/1/