RESOLVED DUPLICATE of bug 243764 242266
Align with spec on SharedArrayBuffer availability (COOP+COEP) and postMessage 
https://bugs.webkit.org/show_bug.cgi?id=242266
Summary Align with spec on SharedArrayBuffer availability (COOP+COEP) and postMessage
Sam Sneddon [:gsnedders]
Reported 2022-07-01 14:30:55 PDT
Brent accidentally sent me down a wormhole that led me here. In short, we should match the spec as of https://github.com/whatwg/html/pull/4734; this means (tl;dr): SharedArrayBuffer is available, though the constructor is not, regardless of COOP+COEP, but cannot be sent via postMessage. With suitable restrictive COOP+COEP headers, the SharedArrayBuffer constructor is available and can be sent via postMessage. See https://wpt.fyi/results/html/infrastructure/safe-passing-of-structured-data?label=master&label=experimental&product=chrome&product=firefox&product=safari&aligned This also explains Bug 220364.
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Radar WebKit Bug Importer
Comment 1 2022-07-01 14:31:07 PDT
<rdar://problem/96314637>
Sam Sneddon [:gsnedders]
Comment 2 2022-07-01 14:54:38 PDT
(In reply to Sam Sneddon [:gsnedders] from comment #0) > Brent accidentally sent me down a wormhole that led me here. Specifically, it led to me writing https://github.com/web-platform-tests/wpt/pull/34678 because they don't pass with our current restrictions (as it turns out, that change is also wrong because I didn't make them load over HTTPS, but that's a problem for next week).
Yusuke Suzuki
Comment 3 2022-08-11 17:31:25 PDT
Fixed in bug 243764 *** This bug has been marked as a duplicate of bug 243764 ***
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