我已使用npm install firebaselike on documentation安装了firebase软件开发包

• • 包. json**

{
  "main": "firebase.js",
  "type": "module",
  "dependencies": {
    "firebase": "^9.15.0"
  }
}

• • 消防基地. js**

import { initializeApp } from 'firebase/app';

const firebaseConfig = {
  //... My apiKey ... etc
};

const app = initializeApp(firebaseConfig);

console.log('DEBUG APP',app);
//until here everything ok I can see the app object

文档的下一步是配置Web凭据：

import { getMessaging, getToken } from "firebase/messaging";
//here got error:
//SyntaxError: The requested module 'firebase/messaging' does not provide an export named 'getToken'
//I tried only  import { getMessaging } ... but also not provided

const messaging = getMessaging();
// Add the public key generated from the console here.
getToken(messaging, {vapidKey: "my_wap_public_key_here"});

我也尝试过从网页客户端（如文档）
您是否使用ESM并希望使用浏览器模块？请替换所有导入行以使用以下模式：从"https：//www.gstatic.com/firebasejs/9.15.0/firebase-SERVICE.js"导入{}（其中服务是SDK名称，如firebase-firestore）。
但如果我尝试

import { initializeApp } from 'https://www.gstatic.com/firebasejs/9.15.0/firebase-app.js';

出现错误Uncaught SyntaxError: Cannot use import statement outside a module