请求的模块不通过快速路由提供名为 default 的导出

Question

我需要帮助来找到我在这里到底缺少什么。

如果有帮助，我的应用程序位于 node.js (16.13.1)，使用最新版本的 express 以及 nginx 反向代理。

应用程序.mjs

import router from './assets/js/router.mjs'; //Imports our routes 

import express from 'express';

const expressapp = express(); //Creates the application with express

const moduleURL = new URL(import.meta.url); //Creates a new URL to use for the current directory name

const __dirname = path.dirname(moduleURL.pathname); //Creates the directory name and attaches it to the __dirname constant.

//Middleware

//Instructions for the app to use body parser & JSON goes here

expressapp.use('/subscribe', router); //Use the subscribe route

expressapp.use(express.static(__dirname, {index: 'index.html'})); //Tells the app to use the current path, with the index being index.html

expressapp.post('/subscribe', (req, res) => 
{
   //post request stuff goes here
}

路由器.mjs

import express from 'express';

var router = express.Router();

// middleware that is specific to this router
router.use(function timeLog (req, res, next) {
  console.log('Time: ', Date.now())
  next()
})
// define the home page route
router.get('/', function (req, res) {
  res.send('Gaming Galaxy Landing Page')
})

// define the subscribe route
router.get('/subscribe', function (req, res) {
  res.send('Subscribe route')
})

export default router;

错误

import router from './assets/js/router.mjs'; //Imports our routes
       ^^^^^^
SyntaxError: The requested module './assets/js/router.mjs' does not provide an export named 'default'
    at ModuleJob._instantiate (node:internal/modules/esm/module_job:124:21)
    at async ModuleJob.run (node:internal/modules/esm/module_job:181:5)
    at async Promise.all (index 0)
    at async ESMLoader.import (node:internal/modules/esm/loader:281:24)
    at async loadESM (node:internal/process/esm_loader:88:5)
    at async handleMainPromise (node:internal/modules/run_main:65:12)

作为一个对这些东西有些陌生的人，当我在我的路由器中专门定义一个默认导出时，我真的不知道出了什么问题。 如果有人可以帮助我了解这里到底发生了什么，将不胜感激

Answer 1

我想你忘了保存 router.mjs 文件，因为我犯了同样的错误并得到了这个错误:)

Answer 2

试试这个代码

const express = require('快递');