WPT

This page compares scores on the Web Platform Tests across web engines, using the latest master runs from wpt.fyi and Blitz's own test runner.

wpt / workers

Spec: https://html.spec.whatwg.org/multipage/workers.html ↗

Sort areas: alphabetical | by subtest count

Area	Chrome	Firefox	Safari	Ladybird	Servo	Blitz
Total	92.2%1468/1592	97.4%1550/1592	98.1%1561/1592	87.0%1385/1592	95.5%1521/1592	0.0%0/1592
baseurl	100.0%7/7	100.0%7/7	100.0%7/7	85.7%6/7	100.0%7/7	0.0%0/7
constructors	84.2%123/146	100.0%146/146	100.0%146/146	97.9%143/146	100.0%146/146	0.0%0/146
examples	100.0%10/10	100.0%10/10	100.0%10/10	80.0%8/10	80.0%8/10	0.0%0/10
interfaces	97.7%210/215	99.1%213/215	99.5%214/215	71.2%153/215	94.0%202/215	0.0%0/215
modules	99.2%235/237	95.4%226/237	95.4%226/237	81.0%192/237	100.0%237/237	0.0%0/237
multi-globals	100.0%1/1	100.0%1/1	100.0%1/1	100.0%1/1	100.0%1/1	0.0%0/1
same-site-cookies	50.0%3/6	33.3%2/6	33.3%2/6	0.0%0/6	0.0%0/6	0.0%0/6
semantics	99.2%517/521	99.6%519/521	100.0%521/521	94.6%493/521	99.2%517/521	0.0%0/521

Test	Chrome	Firefox	Safari	Ladybird	Servo	Blitz
SharedWorker-MessageEvent-source.any.sharedworker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
SharedWorker-constructor.html	7/7	6/7	7/7	6/7	6/7	NOT RUN
SharedWorker-detach-frame-in-error-event.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
SharedWorker-exception-propagation.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
SharedWorker-exception.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
SharedWorker-extendedLifetime-blob.html	PASS	PASS	PASS	TIMEOUT	PASS	NOT RUN
SharedWorker-extendedLifetime-data.html	PASS	PASS	PASS	TIMEOUT	PASS	NOT RUN
SharedWorker-extendedLifetime-named-module.html	2/2	0/2	0/2	0/2	2/2	NOT RUN
SharedWorker-extendedLifetime.html	PASS	FAIL	FAIL	TIMEOUT	PASS	NOT RUN
SharedWorker-replace-EventHandler.any.sharedworker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
SharedWorker-script-error.html	2/2	2/2	2/2	2/2	2/2	NOT RUN
SharedWorker-simple.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
SharedWorkerPerformanceNow.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
SharedWorker_blobUrl.html	PASS	PASS	PASS	TIMEOUT	PASS	NOT RUN
SharedWorker_dataUrl.html	2/2	2/2	2/2	2/2	2/2	NOT RUN
Worker-base64.any.serviceworker.html	PASS	PASS	PASS	ERROR	ERROR	NOT RUN
Worker-base64.any.sharedworker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker-base64.any.worker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker-call.worker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker-constructor-proto.any.serviceworker.html	PASS	PASS	PASS	ERROR	ERROR	NOT RUN
Worker-constructor-proto.any.sharedworker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker-constructor-proto.any.worker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker-creation-happens-in-parallel.https.html	FAIL	TIMEOUT	TIMEOUT	FAIL	FAIL	NOT RUN
Worker-custom-event.any.serviceworker.html	PASS	PASS	PASS	ERROR	ERROR	NOT RUN
Worker-custom-event.any.sharedworker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker-custom-event.any.worker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker-formdata.any.worker.html	PASS	FAIL	PASS	PASS	PASS	NOT RUN
Worker-location.sub.any.sharedworker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker-location.sub.any.worker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker-messageport.html	4/4	4/4	4/4	4/4	4/4	NOT RUN
Worker-multi-port.html	9/9	9/9	9/9	9/9	9/9	NOT RUN
Worker-nested-importScripts-error.html	PASS	PASS	PASS	FAIL	PASS	NOT RUN
Worker-postMessage-happens-in-parallel.https.html	PASS	TIMEOUT	PASS	ERROR	ERROR	NOT RUN
Worker-replace-event-handler.any.serviceworker.html	PASS	PASS	PASS	ERROR	ERROR	NOT RUN
Worker-replace-event-handler.any.sharedworker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker-replace-event-handler.any.worker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker-replace-global-constructor.any.serviceworker.html	PASS	PASS	PASS	ERROR	ERROR	NOT RUN
Worker-replace-global-constructor.any.sharedworker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker-replace-global-constructor.any.worker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker-replace-self.any.serviceworker.html	PASS	PASS	PASS	ERROR	ERROR	NOT RUN
Worker-replace-self.any.sharedworker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker-replace-self.any.worker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker-simultaneous-errors.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker-structure-message.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker-terminate-forever-during-evaluation.html	7/7	7/7	7/7	7/7	5/7	NOT RUN
Worker-terminate-forever.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker-termination-with-port-messages.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker-timeout-cancel-order.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker-timeout-decreasing-order.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker-timeout-increasing-order.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerGlobalScope-close.html	5/5	5/5	5/5	3/5	5/5	NOT RUN
WorkerGlobalScope_ErrorEvent_colno.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerGlobalScope_ErrorEvent_filename.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerGlobalScope_ErrorEvent_lineno.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerGlobalScope_ErrorEvent_message.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerGlobalScope_importScripts.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerGlobalScope_importScripts_NetworkErr.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerGlobalScope_importScripts_NosniffErr.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerGlobalScope_requestAnimationFrame.worker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerGlobalScope_setInterval.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerGlobalScope_setTimeout.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerLocation-origin.sub.window.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerLocation.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerLocation_hash.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerLocation_hash_encoding.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerLocation_hash_nonexist.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerLocation_host.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerLocation_hostname.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerLocation_href.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerLocation_pathname.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerLocation_port.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerLocation_protocol.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerLocation_search.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerLocation_search_empty.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerLocation_search_fragment.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerLocation_search_nonexist.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerNavigator-hardware-concurrency.any.serviceworker.html	PASS	PASS	PASS	ERROR	ERROR	NOT RUN
WorkerNavigator-hardware-concurrency.any.sharedworker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerNavigator-hardware-concurrency.any.worker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerNavigator.any.serviceworker.html	PASS	PASS	PASS	ERROR	ERROR	NOT RUN
WorkerNavigator.any.sharedworker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerNavigator.any.worker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerNavigator_appName.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerNavigator_appVersion.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerNavigator_onLine.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerNavigator_platform.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerNavigator_userAgent.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerNavigator_userAgentData.http.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
WorkerNavigator_userAgentData.https.html	2/2	0/2	0/2	0/2	0/2	NOT RUN
WorkerPerformanceNow.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker_ErrorEvent_bubbles_cancelable.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker_ErrorEvent_error.htm	3/3	3/3	3/3	3/3	3/3	NOT RUN
Worker_ErrorEvent_filename.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker_ErrorEvent_lineno.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker_ErrorEvent_message.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker_ErrorEvent_type.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker_NosniffErr.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
Worker_basic.htm	3/3	3/3	3/3	3/3	3/3	NOT RUN
Worker_cross_origin_security_err.htm	0/2	2/2	2/2	2/2	2/2	NOT RUN
Worker_dispatchEvent_ErrorEvent.htm	3/3	3/3	3/3	3/3	3/3	NOT RUN
Worker_script_mimetype.htm	4/5	5/5	5/5	5/5	5/5	NOT RUN
Worker_terminate_event_queue.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
abrupt-completion.html	1/2	1/2	2/2	2/2	2/2	NOT RUN
data-url-shared.html	9/9	9/9	9/9	9/9	9/9	NOT RUN
data-url.html	9/9	9/9	9/9	9/9	9/9	NOT RUN
dedicated-worker-from-blob-url.window.html	3/3	3/3	3/3	3/3	3/3	NOT RUN
dedicated-worker-in-data-url-context.window.html	2/4	4/4	4/4	4/4	4/4	NOT RUN
dedicated-worker-parse-error-failure.html	0/2	2/2	2/2	2/2	2/2	NOT RUN
dedicated-worker-runtime-error-is-not-parse-error.html	2/3	3/3	3/3	3/3	3/3	NOT RUN
importscripts_mime.any.serviceworker.html	24/24	24/24	24/24	0/24	0/24	NOT RUN
importscripts_mime.any.sharedworker.html	24/24	24/24	24/24	24/24	24/24	NOT RUN
importscripts_mime.any.worker.html	24/24	24/24	24/24	24/24	24/24	NOT RUN
importscripts_mime_local.any.sharedworker.html	12/48	48/48	48/48	48/48	47/48	NOT RUN
importscripts_mime_local.any.worker.html	12/48	48/48	48/48	48/48	47/48	NOT RUN
name-property.html	6/6	6/6	6/6	6/6	6/6	NOT RUN
nested_worker.worker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
nested_worker_close_from_parent_worker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
nested_worker_close_self.worker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
nested_worker_importScripts.worker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
nested_worker_sync_xhr.worker.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
nested_worker_terminate_from_document.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
opaque-origin.html	6/6	6/6	6/6	4/6	5/6	NOT RUN
postMessage_DataCloneErr.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
postMessage_block.https.html	CRASH	PASS	PASS	FAIL	FAIL	NOT RUN
postMessage_clone_port.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
postMessage_clone_port_error.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
postMessage_event_properties.htm	PASS	PASS	PASS	PASS	FAIL	NOT RUN
postMessage_ports_readonly_array.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
postMessage_target_source.htm	PASS	PASS	PASS	PASS	PASS	NOT RUN
same-origin-check.sub.html	16/16	16/16	16/16	16/16	16/16	NOT RUN
shared-worker-from-blob-url.window.html	4/4	4/4	4/4	4/4	4/4	NOT RUN
shared-worker-in-data-url-context.window.html	0/2	0/2	2/2	2/2	2/2	NOT RUN
shared-worker-name-via-options.html	PASS	PASS	PASS	FAIL	PASS	NOT RUN
shared-worker-options-mismatch.html	32/32	24/32	24/32	24/32	32/32	NOT RUN
shared-worker-parse-error-failure.html	2/2	2/2	2/2	2/2	2/2	NOT RUN
shared-worker-partitioned-cookies.tentative.https.html	3/3	2/3	2/3	2/3	2/3	NOT RUN
shared-worker-partitioned.tentative.html	PASS	PASS	PASS	FAIL	PASS	NOT RUN
shared-worker-runtime-error-is-not-parse-error.html	1/3	1/3	3/3	3/3	3/3	NOT RUN
worker-performance.worker.html	14/14	14/14	14/14	14/14	13/14	NOT RUN
worker-request-animation-frame.html	PASS	PASS	PASS	PASS	PASS	NOT RUN
worker-url-encoding.html	PASS	PASS	PASS	PASS	PASS	NOT RUN