161472 2016-08-31 20:30:44 -0700 [META] Implement BroadcastChannel 2021-09-15 18:39:48 -0700 1 1 1 Unclassified WebKit WebKit Misc. Safari 9 Unspecified Unspecified RESOLVED FIXED P2 Normal --- 187001 227919 227924 229814 230164 230181 230235 230236 1 yljia cdumez 709922234 beidson bugmail cdumez david.fahlander david.malcom.graham edwardjsabol feliziani.emanuele fred.wang ggaren hello ian koddsson lwarlow minijus.l m.kurz+webkitbugs nicolas philip rbuis rniwa sihui_liu tomac yljia youennf yoyo837 zac.spitzer oldest_to_newest 1225227 0 yljia 2016-08-31 20:30:44 -0700 https://html.spec.whatwg.org/multipage/comms.html#broadcastchannel https://developer.mozilla.org/en-US/docs/Web/API/BroadcastChannel 1436479 1 fred.wang 2018-06-26 06:07:11 -0700 Some WPT tests have been imported in 187001, see LayoutTests/imported/w3c/web-platform-tests/webmessaging/. 1657862 2 rbuis 2020-06-01 02:52:20 -0700 Implementing this would also improve some WPT tests that use BroadcastChannel to test some other feature. 1661135 3 feliziani.emanuele 2020-06-10 04:33:51 -0700 This provides a simple way to sync functionality across tabs (especially login/logout). Other browsers have had this for years (see https://hacks.mozilla.org/2015/02/broadcastchannel-api-in-firefox-38/ and https://developers.google.com/web/updates/2016/09/broadcastchannel). I hope this gets prioritized soon. 1679190 4 rniwa 2020-08-10 13:56:10 -0700 In order for us to implement this feature, we need to have the partitioning of BroadcastChannel spec'ed since non-partitioned BroadcastChannel would introduce a new tracking vulnerability. 1680266 5 philip 2020-08-14 06:14:56 -0700 The spec issue is tracked in https://github.com/whatwg/html/aissues/5803 now (filed by rniwa) 1689220 6 tomac 2020-09-16 14:31:10 -0700 Correct spec issue link: https://github.com/whatwg/html/issues/5803 (there was a superfluous ’a’ in the link in the previous comment. 1731376 7 hello 2021-02-19 09:21:13 -0800 Would be great to have this n Safari and not have to fallback to polling IndexedDB. 1732803 8 david.fahlander 2021-02-24 01:18:40 -0800 Communicating between service worker and DOM windows can be essential for sync use cases in PWAs. Safari is the only modern browser not supporting this. There is a polyfill for this with its limitations: It doesn't support workers and it doesn't support structured cloning - https://www.npmjs.com/package/broadcastchannel-polyfill. Polyfilling it for workers is harder to do. It would be awesome if BroadcastChannel could soon become present in all modern browsers and if only Safari implements it we would be there. 1756482 9 tomac 2021-05-04 02:54:06 -0700 (For folks relying on the `BroadcastChannel` polyfill: it's currently broken in 14.1 due to https://bugs.webkit.org/show_bug.cgi?id=225344.) 1793933 10 cdumez 2021-09-15 18:39:48 -0700 All implemented via subtasks and enabled by default.