wait for execute alert(123) after execute registerUser() into onLogin() in JavaScript and React-Native

Question

this is my function A :

 export function registerUser(mobile) {
    ...
}

this is function B :

    async function onLogin () {
     await registerUser(global.registerMobile)  
      >>>>>>>>alert(123)
  }

now I want to run alert(123) after registerUser function execute Please Help Me...

Answer 1

Here is my example code

 export const registerUser = (mobile) => new Promise(resolve => { Axios.get('SOME URL').then(res => { resolve(res.data); }); });

Answer 2

mark your registerUser function async

export async function registerUser(mobile) {
    await // do async stuff
}

or in case you are using promise, you should return it to be able to await for it in onLogin

export function registerUser(mobile) {
    return fetch('..register url..', options)
}