Repository navigation
Structured cloning of WebAssembly.Memory is not defined #2155
Description
Activity
Just to clarify, this is only serializing/deserializing shared
WebAssembly.Memoryright? I don't think Gecko supports doing that for unshared memories. You could make a copy of the underlying ArrayBuffer if you want, but it's not transferable.Technically the threads proposal hasn't merged yet, and so shared memory isn't defined here yet. I looked upstream though and it is missing a definition for this in the specification there.
I created some tentative tests here to clarify what I mean and what I think the specification needs to require: web-platform-tests/wpt#59748.
- added a commit that references this issue
on May 16, 2026 - added a commit that references this issue
on May 19, 2026 - added a commit that references this issue
on May 19, 2026 - added 3 commits that reference this issue
on May 20, 2026
At least Gecko and WebKit support serializing & deserializing
WebAssembly.Memoryobjects. Yet https://webassembly.github.io/spec/web-api/#serialization only coversWebAssembly.Module.I also couldn't find test coverage for this on WPT.