Why does my Kotlin app fail to load a Kotlin ServiceWorker script because 'kotlin' was not found?

Question

I'm writing my first Progressive Web App for some experience with the concept. The web app is written in Kotlin.js and the ServiceWorker is too. When running the app I get this error Uncaught Error: Error loading module 'serviceWorker'. Its dependency 'kotlin' was not found. Please, check whether 'kotlin' is loaded prior to 'serviceWorker'.

at serviceWorker.js:2`. How and why would 'kotlin' be missing as a dependency, when it is loaded from a kotlin app, that already is using kotlin as a dependency? given how the application is set up? Is a service worker unable to access the same dependencies as the file loads the service worker?

Answer 1

Service workers operate in their own environment. A different namespace. The DOM cannot be accessed by a serviceworker, so the none of the definitions from the module loading the service worker are available to the service worker.

One simple solutions is to have a js file with both kotlinjs and the service worker code in the one file.