AsyncIterator

Baseline *

20201

AsyncIterator next() AsyncIterator.prototype @@asyncIterator

AsyncIterator async iterator helpers proposal AsyncIterator.prototype

const AsyncIteratorPrototype = Object.getPrototypeOf(
  Object.getPrototypeOf(Object.getPrototypeOf((async function* () {})())),
);

JavaScript AsyncGenerator API ReadableStream

next() AsyncIterator.prototype @@asyncIterator

: AsyncIterator.prototype @@iterator

AsyncIterator.prototype[Symbol.asyncIterator]()

for await...of

const asyncIterator = (async function* () {
  yield 1;
  yield 2;
  yield 3;
})();
(async () => {
  for await (const value of asyncIterator) {
    console.log(value);
  }
})();
// : 1, 2, 3


ECMAScript 2027 LanguageSpecification # sec-asynciteratorprototype

async function*

MDN

MDN 2025722

GitHub

AsyncIterator
1. [Symbol.asyncDispose]()
2. AsyncIterator.prototype[Symbol.asyncIterator]()
Object/Function
1. __proto__
2. constructor