Once you have the initial setup done, it's time to run your app. First we'll run the app in development environment. In development environment, your app runs in a browser (of your choice). It is recommended to make all changes and development while running the app on browser . Running on device while developing will be too time consuming.
To run the app on browser, run
$ ionic serve
on your command line, inside your project folder. This will build the project and deploy it on a
localhost url (usually it is
localhost:8100). Your command line will look like this
The initial deploy process will take some time when it creates "chunks" of code pieces. Once you see
compiled successfully , you are good to go. Your browser window will open automatically and load the app in a full screen view.
To change the app to a device view, right click anywhere on the browser and choose
Inspect Elementand choose device mode.
More about browser development tools can be found out in following links