Progressive Online Apps PWAs are a relatively new concept in web and mobile app development. The phrase, coined by Google developer Alex Russell in 2015, refers to online applications that utilize “progressive” design principles to act and operate similarly to native apps. What it technically implies may not be entirely obvious, given there is no formal definition of what constitutes a progressive web application. However there are several distinguishing features that are indicative of PWA design patterns. These include the usage of Service Workers background scripts that run in the browser to offer functionality such as push notifications and app manifests standardized JSON files that instruct the platform how to install and manage your app). There are also some common
