188495 2018-08-12 18:09:14 -0700 importScripts should throw an error when used to load new resource after `install` event 2018-08-12 18:09:14 -0700 1 1 1 Unclassified WebKit Service Workers Safari Technology Preview Unspecified Unspecified NEW P2 Normal --- 1 falken webkit-unassigned oldest_to_newest 1449559 0 falken 2018-08-12 18:09:14 -0700 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.