The AsyncFunction object provides methods for async functions. In JavaScript, every async function is actually an AsyncFunction object.

Note that AsyncFunction is not a global object. It can be obtained with the following code:

const AsyncFunction = async function () {}.constructor;

AsyncFunction is a subclass of Function.

Constructor

• AsyncFunction()
  • : Creates a new AsyncFunction object.

Instance properties

Also inherits instance properties from its parent Function.

These properties are defined on AsyncFunction.prototype and shared by all AsyncFunction instances.

• AsyncFunction.prototype.constructor
  • : The constructor function that created the instance object. For AsyncFunction instances, the initial value is the AsyncFunction constructor.
• AsyncFunction.prototype[@@toStringTag]
  • : The initial value of the @@toStringTag property is the string "AsyncFunction". This property is used in Object.prototype.toString.

Note: AsyncFunction instances do not have the prototype property.

Instance methods

Inherits instance methods from its parent Function.

Specifications

Browser compatibility

See also

• async function
• async function expression
• Function
• AsyncGeneratorFunction
• GeneratorFunction
• Functions