A fetch event handler in the service worker to provide a basic offline experience.īecause the test that a PWA meets installability requirements can take several seconds, installability itself may not be available as soon as a URLs response is received.At least one icon in the correct format and size.An exception to this is Safari for macOS, which does not support installability.Ĭhromium-based browsers on desktop and Android, including Google Chrome, Samsung Internet, and Microsoft Edge, have additional requirements, such as:
The metadata for your PWA is set by a JSON-based file known as the Web App Manifest, which we will cover in detail in the next module.Īs a minimum requirement for installability, most browsers that support it use the Web App Manifest file and certain properties such as the name of the app, and configuration of the installed experience. Installation criteria #Įvery browser has a criterion that marks when a website or web app is a Progressive Web App and can be installed for a standalone experience. While installation differs per browser and operating system, you don't need to create any kind of package or executable for your PWA to be installed from a browser.
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