
Notice how the "add to shelf" prompt was triggered in the screenshot above, even though DevTools is in Device Mode. The Add to Homescreen feature cannot yet simulate the workflow for mobile devices. The Console tells you if your manifest has any issues and logs other information about the Add to Homescreen lifecycle. Tip: Keep the Console drawer open while simulating Add to Homescreen events. Clicking on Add to Homescreen while the app is open prompts Chrome to display the "add this site to your shelf" banner, which is the desktop equivalent of the "add to homescreen" banner for mobile devices. You can test out this feature with the Google I/O 2016 progressive web app, which has proper support for Add to Homescreen. The Add to homescreen button on the App Manifest pane lets you simulate Add to Homescreen events whenever you want. While developing or debugging your Add to Homescreen workflow, this criteria can be inconvenient.

Use the Manifest pane to inspect your web app manifest and trigger Add to Homescreen events.If you're looking for help on the other panes, check out the last section of this guide, Other Application panel guides. This guide only discusses the Progressive Web App features of the Application panel. Use the Application panel to inspect, modify, and debug web app manifests, service workers, and service worker caches.
