Limited Availability Progressive web app

Launch handler

The launch_handler web app manifest member, with the client_mode property, configure how web app launches behave when an instance of the app is already open. For example, you can choose to focus the existing app instance instead of launching a new one.

Baseline Status: This feature is currently Limited (not yet Baseline). Latest engine implementation shipped on Feb 9, 2023.

Desktop Browser Engine Support

Google Chrome

110

Supported

Mozilla Firefox

—

Unsupported

Apple Safari

—

Unsupported

Microsoft Edge

110

Supported

Mobile Browser Engine Support

Chrome Android

—

Firefox Android

—

Safari iOS

—

Specifications and References

Specification ↗ Feature XML ↗

MDN Browser Compat Data Keys:

api.LaunchParams ↗ api.LaunchParams.targetURL ↗ api.LaunchQueue ↗ api.LaunchQueue.setConsumer ↗ api.Window.launchQueue ↗ manifests.webapp.launch_handler ↗ manifests.webapp.launch_handler.client_mode ↗