cc @mikewest @annevk @ericlaw1979

From https://html.spec.whatwg.org/multipage/system-state.html#normalize-protocol-handler-parameters:

'If the resulting URL record's scheme is not "https" or the resulting URL record's origin is not same origin with environment's origin, then throw a "SecurityError" DOMException.'

It seems this forbids localhost URLs like http://127.0.0.1 that are in a se

I know this is specific to web workers, however I think this could be adapted to work for service workers. I was looking to create a separate plugin but the code would be mostly the same.

Looks like it scans the AST for a keyword (Worker) and generates an entry for the referenced file.

// web worker
new Worker('./foo.js', { type: 'module' })

// service worker
navigator.servi

Crash java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: Unable to load script from assets 'threads/pre-load-data-worker.thread.bundle'. Make sure your bundle is packaged correctly or you're running a packager server.

![screen shot 2018-07-28 at 11 29 18](https://user-images.githubusercontent.com/3612098/43357535-8379af28-9259-11e8-9c5a-96