Javascript 如何从另一个作用域返回值

我在javascript中的函数中有一个函数。我在最里面的函数中得到我的值，但我需要在最外面的函数中返回它。像这样：

import convertPrice from "./convertPrice";
import getCountryInfoByLanguage from "./getCountryInfoByLanguage";
import axios from "axios";
export default (language, price) => {
  let countryCode, currency, formattedPrice;

  navigator.geolocation.getCurrentPosition(position => {
    axios
      .get(
        `http://api.geonames.org/countryCodeJSON?lat=${
          position.coords.latitude
        }&lng=${position.coords.longitude}&username=...`
      )
      .then(response => {
        countryCode = getCountryInfoByLanguage(
          response.data.languages.split(",")[0]
        ).countryCode;
        currency = getCountryInfoByLanguage(
          response.data.languages.split(",")[0]
        ).currency;
        const convertedPrice =
          Math.round(convertPrice(price, currency) * 10) / 10;
        formattedPrice = convertedPrice.toLocaleString(countryCode, {
          style: "currency",
          currency: currency
        });
        console.log(formattedPrice);
        return formattedPrice; //This is where the value gets properly returned
      });

  });
    //this is where I want the value to be returned
};

---

由于您正在处理承诺，因此您始终可以返回承诺并在最后调用最终的

import convertPrice from "./convertPrice";
import getCountryInfoByLanguage from "./getCountryInfoByLanguage";
import axios from "axios";
export default (language, price) => {
  let countryCode, currency, formattedPrice;

  navigator.geolocation.getCurrentPosition(position => {
    return axios
      .get(
        `http://api.geonames.org/countryCodeJSON?lat=${
          position.coords.latitude
        }&lng=${position.coords.longitude}&username=filipk268`
      )
      .then(response => {
        countryCode = getCountryInfoByLanguage(
          response.data.languages.split(",")[0]
        ).countryCode;
        currency = getCountryInfoByLanguage(
          response.data.languages.split(",")[0]
        ).currency;
        const convertedPrice =
          Math.round(convertPrice(price, currency) * 10) / 10;
        formattedPrice = convertedPrice.toLocaleString(countryCode, {
          style: "currency",
          currency: currency
        });
        console.log(formattedPrice);
        return formattedPrice; //This is where the value gets properly returned
      });

  }).then((data) => {
      console.log(data);
  })
};

请注意，我在这里返回axios调用，它返回一个承诺，您甚至可以返回
navigator.geolocation.getCurrentPosition
它将作为当前范围之外的承诺进行访问。
这是否回答了您的问题？不，这不行。我得到navigator.geolocation.getcurrentposition是未定义的错误。您能检查是否定义了
navigator.geolocation
？我在浏览器控制台中检查了它，它是。当我删除最后一个时，错误消失。然后（）尝试理解我所做的，而不是复制粘贴我的代码。为什么我要尝试理解不起作用的代码？