AsyncGenerator

The AsyncGenerator object is returned by an async generator function and it conforms to both the async iterable protocol and the async iterator protocol.

AsyncGenerator is a subclass of the hidden AsyncIterator class.

There’s no JavaScript entity that corresponds to the AsyncGenerator constructor. Instances of AsyncGenerator must be returned from async generator functions:

There’s only a hidden object which is the prototype object shared by all objects created by async generator functions. This object is often stylized as AsyncGenerator.prototype to make it look like a class, but it should be more appropriately called AsyncGeneratorFunction.prototype.prototype, because AsyncGeneratorFunction is an actual JavaScript entity. To understand the prototype chain of AsyncGenerator instances, see AsyncGeneratorFunction.prototype.prototype.