December 2021 web platform update

Newly available on the web platform

Newly available

• SharedArrayBuffer and Atomics: The SharedArrayBuffer object represents bytes shared between multiple workers and the main thread. The Atomics object safely accesses SharedArrayBuffer data to make sure predictable values are read and written and that operations are not interrupted. Learn more.

• Threads and atomics (WebAssembly): Threads in WebAssembly run code in parallel, while atomic memory instructions can guarantee that no two threads can read or write to shared memory at the same time. Learn more.