Can I use SharedArrayBuffer on iOS?

Question

According to Mozilla, there is no browser on iOS supporting the cross-origin-opener-policy, which is one of the security requirements for enabling a SharedArrayBuffer. Does this mean I cannot use a SharedArrayBuffer for any web-application on the iOS platform?

score 1 · Answer 1 · answered Aug 09 '20 at 08:37

1

Unfortunately SharedArrayBuffer was disabled due to Spectre / Meltdown issues, so no, you cannot use it:

answered Aug 09 '20 at 08:37

ColinE

Yes, I noticed that, yet hoped there was some special set of requirements that made it possible, as has been done with other platforms. Hopefully, this issue will be rectified soon. – Jack Aug 09 '20 at 16:10

score 1 · Accepted Answer · answered May 24 '21 at 17:39

1

actually it says on the Caniuse site that you can enable the feature, but I have found no documentation to this end re: Safari

answered May 24 '21 at 17:39

user3325025

1

Nice catch! I had missed that detail. – Jack May 26 '21 at 15:11
I was hoping to use opencv.js, but this blocked me on Safari on both mac os and iOS and I haven't found any way to enable that feature. – user3325025 May 27 '21 at 17:56

score 1 · Answer 3 · answered Sep 16 '21 at 12:45

1

There's a flag you can enable now in Safari:

Resurrected SharedArrayBuffer and Atomics behind a flag (JSC_useSharedArrayBuffer=1) (r269531)

answered Sep 16 '21 at 12:45

Alexander

1

Can you please specify how this flag can be used? – ilpianoforte Sep 24 '21 at 09:35

ilpianoforte · Answer 4 · 2021-12-09T17:38:28.297

1

To complete user3325025 and Alexander's answer, you can open Safari with SharedArrayBuffer enabled by typing the following command in the terminal:

__XPC_JSC_useSharedArrayBuffer=1 open -a "Safari"

Here is a list of browsers that support SharedArrayBuffer: https://caniuse.com/sharedarraybuffer

edited Dec 09 '21 at 17:38

answered Sep 29 '21 at 06:44

ilpianoforte

score 1 · Answer 5 · edited Jan 24 '22 at 14:17

1

If the user has upgraded to Safari 15.2, SharedArrayBuffer can be enabled with COOP and COEP headers. See this documentation page.

edited Jan 24 '22 at 14:17

Marco Bonelli

answered Jan 17 '22 at 16:37

haroon

While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes. - [From Review](/review/late-answers/30839702) – tomerpacific Jan 24 '22 at 16:11

score 0 · Answer 6 · answered Oct 04 '21 at 01:47

Safari Technology Preview recently announced it can enable SharedArrayBuffer when the page is cross-origin isolated. https://webkit.org/blog/11975/release-notes-for-safari-technology-preview-133/

There are certain requirements to enable cross-origin isolation. Learn more here: https://web.dev/coop-coep/

6 Answers6