Employers must keep a "Log and Summary of Occupational Injuries and Illnesses. In this codelab, you'll use a service worker to manage notifications.The instructions here assume that you're already familiar with service workers. Education and Experience Exam: Fill out all the required sections displayed onscreen (if applicable). Follow the onscreen application instructions for electronically submitting your application and payment, and completing any required information. Applicants should complete the "Request for Application Fee Waiver and Certification" form online. I need the service worker that send push notification even the user isn't on my website. First we need to register the event that we are going to put in the queue. New York City will text you when jobs become available that fit your preferences. If the browser is completely closed then service workers can not run and will not dispatch any events (ie no push or background sync events)