Getting jQuery because it can be useful

One of the most relevant features of KnockoutJS is its browser compatibility; it even works on ancient browsers, so you can use it if you need to support them.

When you develop a big application to be used online you have to decide which browser you're going to support; the main reason is that each browser you decide to support means:

For this reason, many big companies keep an eye on the browser market share data; it helps you to decide if it's time to drop support for a particular browser.

I mentioned this here because we are going to use jQuery. This library is different from KnockoutJS, because you must choose between two branches: 1.x and 2.x.

The main difference here is the compatibility; if you want to support all the browsers KnockoutJS supports you have to download the 1.x branch, otherwise you can choose 2.x.

After you download it, save it as SimpleShowCase/js/jquery.js.

Then update the index page to include it before the row where we included KnockoutJS:

    </div>
    <script type="text/javascript" src="js/jquery.js"></script>
    <script type="text/javascript" src="js/knockout.js"></script>