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.

The cause property of errors records the specific original cause of the error, particularly for errors that have been re-thrown.

The BigInt64Array and BigUint64Array typed arrays represent 64-bit integers, signed and unsigned respectively.

The WeakRef and FinalizationRegistry objects hold references to garbage-collectable objects without creating strong references that prevent their garbage collection.