node_modules/express/lib/router/index.js:458 throw new TypeError('Router.use() requires a middleware

Posted 2023-02-22

【中文标题】node_modules/express/lib/router/index.js:458 throw new TypeError(\'Router.use() requires a middleware function but got a \' + gettype(fn))

【英文标题】：node_modules/express/lib/router/index.js:458 throw new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn))node_modules/express/lib/router/index.js:458 throw new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn))

【发布时间】：2018-08-11 11:48:31

【问题描述】：

我正在尝试创建 nodejs express 应用程序，但在使用路由时遇到了奇怪的问题 这就是我的 server.js 的样子

const express = require('express');
const bodyParser = require('body-parser');
const path = require('path');
const http = require('http');
const api = require('./server/routes/api');

const app = express();

app.use(bodyParser.json());
app.use(bodyParser.urlencoded(extended:false));

app.use('/api',api);
app.use(express.static(path.join(__dirname,'dist')));

app.get('/',function(req,res)
res.sendFile(path.join(__dirname,'dist/index.html'));
);

const port = process.env.port || 3000;

app.set('port',port);
const server = http.createServer(app);
server.listen(port,function()
console.log('server running at port '+port);
);

我收到以下错误“node_modules/express/lib/router/index.js:458 throw new TypeError('Router.use() 需要一个中间件函数但得到一个' + gettype(fn)) "

请告诉我哪里出错了

【参考方案1】：

我只是忘记在我的 api.js 中添加 module.exports = router 添加这解决了我的问题