如何将需求转换为es6中的import语句

Question

我想让它在firebase中运行：

var FirebaseTokenGenerator = require("firebase-token-generator");
var tokenGenerator = new FirebaseTokenGenerator("<YOUR_FIREBASE_SECRET>");
var token = tokenGenerator.createToken({ uid: "1", some: "arbitrary", data: "here" });

但是我得到require is not defined error

然后切换到：

import FirebaseTokenGenerator from("firebase-token-generator");
  var tokenGenerator = new FirebaseTokenGenerator("<YOUR_FIREBASE_SECRET>");
  var token = tokenGenerator.createToken({ uid: "uniqueId1", some: "arbitrary", data: "here" });

我得到Uncaught SyntaxError: Unexpected token import

为什么这会失败，我是否获得了导入权？