Typescript: This expression is not callable. Type '{ getUserInfo(requestData: object): Promise<object>; }' has no call signatures

Question

I am having following issue, when i call to another function in typescript

This expression is not callable. Type '{ getUserInfo(requestData: object): Promise; }' has no call signatures. in my index.ts

index.ts

  const fetchApiData = await getUserInfo(requestData)

service.ts

import { userInfoApi } from '../constants/api'
import request from '../utils/request'

export default {
  async getUserInfo(requestData: object): Promise<object> {
    return await request(userInfoApi, requestData, 'GET')
  },
}

request.ts

const request = (operation: string, data: object, method: any): Promise<object> => {
  return new Promise(function(resolve, reject) {
    my.request({
      url: operation,
      data: data,
      method: method,
      success: function(res) {
        resolve(res)
      },
      fail: function(err) {
        reject(err)
      },
    })
  })
}

export default (operation: string, data: object, method: any): Promise<any> => {
  let timeHandle
  const timeout = 65 * 1000
  const promiseTimeout = new Promise(resolve => {
    timeHandle = setTimeout(() => {
      resolve({
        success: false,
        errorCode: 'NETWORK_TIMEOUT',
        errorMessage: 'Network Timeout',
      })
    }, timeout)
  })

  return Promise.race([
    request(operation, data, method).then(result => {
      clearTimeout(timeHandle)
      return result
    }),
    promiseTimeout,
  ])
}

Any idea how to fix it?

Answer 1

The error is valid.

Fix option 1 : Fix at call

Based on your error Type '{ getUserInfo(requestData: object): Promise; }' has no call signatures instead of calling something(requestData) you should be calling something.getUserInfo(requestData).

Fix option 2 : Fix at definition

Change:

export default {
  async getUserInfo(requestData: object): Promise<object> {
    return await request(userInfoApi, requestData, 'GET')
  },
}

to

export default async function getUserInfo(requestData: object): Promise<object> {
    return await request(userInfoApi, requestData, 'GET')
};