In order to run the web app, you need to turn your
/www folder into a web server. Again, there are many methods to do this and people tend to stick with one or two ways to keep things simple. A few other options are unreliable, such as Sublime Text's live watch package or static page generator (for example, the Jekyll and Middleman apps). They are slow to detect changes and may freeze your IDE. So those won't be mentioned here.
The recommended method is to use the
ionic serve command line. It basically launches an HTTP server so that you can open your app in a desktop browser.
projectfolder. Let's assume that it is the Side Menu HelloWorld:
$ cd HelloWorld_Sidemenu ...