The 'void' data type must be equipped with a '[Symbol.iterator]()' function that produces an iterator

Question

The 'void' data type must be equipped with a '[Symbol.iterator]()' function that produces an iterator

Whenever I execute the post() function below, it triggers an error message stating:

Type 'void' must have a '[Symbol.iterator]()' method that returns an iterator.

This is the code snippet causing the issue:


static async post(options:object) {
    const promise = postRequest(options)
    const [err, data] = await this.promiseWapper(promise);
    return [err, data]
}

static async promiseWapper(promise: any) {
    return
    promise()
      .then((res: any) => [undefined, res])
      .catch((err: any) => [err, undefined])
}

Is there a way to rectify these errors in order to successfully run the code?

javascript typescript

Answer 1

Answer №1

After reviewing your code, I made some adjustments. PromiseWrapper was incorrectly calling promise as a FUNCTION using promise(), when it should be treated as a promise object. If we assume that postRequest does indeed return a promise...

  async function post(options) {
    const promise = postRequest(options)
    const [err, data] = await promiseWapper(promise);
    return [err, data]
  }

  async function promiseWapper(promise) {
    return promise
      .then((res) => [undefined, res])
      .catch((err) => [err, undefined])
  }

  function postRequest() {
    return Promise.resolve(true);
  }

  post();

Answer 2

After reviewing your code, I made some adjustments. PromiseWrapper was incorrectly calling promise as a FUNCTION using promise(), when it should be treated as a promise object. If we assume that postRequest does indeed return a promise...

  async function post(options) {
    const promise = postRequest(options)
    const [err, data] = await promiseWapper(promise);
    return [err, data]
  }

  async function promiseWapper(promise) {
    return promise
      .then((res) => [undefined, res])
      .catch((err) => [err, undefined])
  }

  function postRequest() {
    return Promise.resolve(true);
  }

  post();

The 'void' data type must be equipped with a '[Symbol.iterator]()' function that produces an iterator

Answer №1

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