Asynchronous transfer of RN-js to Synchronize

RN development, in a utility class, I need to export an environment parameter, but this parameter is read asynchronously through AsyncStorage.

import { AsyncStorage } from "react-native"

_retrieveData = async () => {
  let result = "prod"
  try {
    const value = await AsyncStorage.getItem("currentEnv");
    if (value !== null) {
      // We have data!!
      console.log("~~~~", value);
      result = value
    }
   } catch (error) {
     // Error retrieving data
     console.log("~~~~null");
   }

   return result
}

var testEnv = ""
_retrieveData().then((env) => testEnv = env)

export const curEnv = testEnv

the environmental background of the problems and what methods you have tried

related codes

/ / Please paste the code text below (do not replace the code with pictures)

what result do you expect? What is the error message actually seen?

Dec.06,2021

if you close this train of thought, it will not be correct

.
Menu