AsyncGenerator.prototype.throw()

asyncGeneratorInstance.throw(exception)

// 异步任务。假设它在实践中做了一些更有用的事情。
function sleep(time) {
  return new Promise((resolve, reject) => {
    setTimeout(resolve, time);
  });
}

async function* createAsyncGenerator() {
  while (true) {
    try {
      await sleep(500);
      yield 42;
    } catch (e) {
      console.error(e);
    }
  }
}

const asyncGen = createAsyncGenerator();
asyncGen.next(1).then((res) => console.log(res)); // { value: 42, done: false }
asyncGen
  .throw(new Error("出了点问题")) // Error: 出了点问题
  .then((res) => console.log(res)); // { value: 42, done: false }