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What is a valid event for a Service Worker to emit when it’s registered?

Google Mobile Sites Exam Answers

    What is a valid event for a Service Worker to emit when it’s registered?

    • Canceled
    • Install
    • Idle
    • Stop

    Correct answer is:

    • Install

    Explanation: To install a service worker for your site, you need to register it, which you do in your page’s JavaScript. Registering a service worker will cause the browser to start the service worker install step in the background.
    Read more here: https://support.google.com/partners/answer/7336697

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