Bug 188495

Summary:	importScripts should throw an error when used to load new resource after `install` event
Product:	WebKit	Reporter:	Matt Falkenhagen <falken>
Component:	Service Workers	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal
Priority:	P2
Version:	Safari Technology Preview
Hardware:	Unspecified
OS:	Unspecified

Description Matt Falkenhagen 2018-08-12 18:09:14 PDT

Same as https://bugs.chromium.org/p/chromium/issues/detail?id=719052

The WPT test for this is: service-workers/service-worker/import-scripts-updated-flag.https.html

As far as I can tell from the demo site from https://github.com/w3c/ServiceWorker/issues/1021#issuecomment-266708110, Safari Technology Preview is allowing the importScripts(), so the WPT test should fail.

Chrome intends to change to align with the spec, as Firefox and Edge have done.