我已經(jīng)看到這個問題被多個人問到，但沒有一個答案對我有用。我正在嘗試使用react / axios對Google Maps api進(jìn)行API調(diào)用。這是我的要求：componentDidMount() {  axios({   method : 'get',   url : `http://maps.googleapis.com/maps/api/js?key=${key}/`,   headers: {     "Access-Control-Allow-Origin": '*'     "Access-Control-Allow-Methods": 'GET',   },  }) .then(function (response) {  console.log(response); }) .catch(function (error) {  console.log(error); });}這是錯誤消息：XMLHttpRequest cannot load http://maps.googleapis.com/maps/api/js?key=xxxxxxxxx/. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:3000' is therefore not allowed access.我已經(jīng)閱讀了con CORS文章，其他所有人都指向 https://www.html5rocks.com/en/tutorials/cors/但我在那里找不到解決問題的答案。