Workbox Products Workbox Reference Docs Class: Plugin workbox.backgroundSync.Plugin class static Version v4.3.1 A class implementing the fetchDidFail lifecycle callback. This makes it easier to add failed requests to a background sync Queue. Constructor Plugin new Plugin(...queueArgs) Parameter queueArgs any type Args to forward to the composed Queue instance. See the Queue documentation for parameter details. Value may be repeated. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated May 1, 2019.