Download the library from https://github.com/jakerella/jquery-mockjax.

Save it into the vendors folder.

Add a reference in the index.html page, just after the jQuery library. To do this, use the <script> tag, as shown here:

<script type='text/javascript' src='vendors/jquery.mockjax.js'></script>

Create a folder called mocks and create a product.js file inside it.

In the product.js file, define a mock calling the $.mockjax function, as follows:

$.mockjax({
  url: '/products',
  type: 'GET',
  dataType: 'json',
  responseTime: 750,
  responseText: []
});

In this definition, you are mocking the request called inside the ProducResource...