Runtime: navigator.serviceWorker is undefined

Overview

Message Source: dev tools

Service Workers are fully supported in OpenFin. If navigator.serviceWorker is undefined or navigator.serviceWorker.register is returning "Cannot read property 'register' of undefined" it's likely the issue is that the Service Worker is not running in a secure context. 

Service workers are required to run in a Secure Context (MDN Chromium), i.e. localhost and/or https.  The value of window.isSecureContext indicates wether those features are available (one caveat is this is true for file:// URLs but won't work).

Workarounds

• run in a Secure Context (localhost and/or https)
• runtime flag: --unsafely-treat-insecure-origin-as-secure e.g.

"runtime": {
  "arguments": "--unsafely-treat-insecure-origin-as-secure=http://example.com",
  "version": "<VERSION>"
}