[英]TypeError: Router.use() requires a middleware function but got a undefined at Function.use
[英]TypeError: Router.use() requires a middleware function but got a string at Function.use
我是 Node 和 ExpressJs 開發的新手,但是,我無法導入我創建的模塊路由器作為練習。
它給了我這個錯誤:
TypeError: Router.use () requires a middleware function but got a string
at Function.use
我已經嘗試過 module.exports 解決方案,但它不起作用。 初始化函數也失敗。
以下是我正在使用的版本:
節點版本:v10.19.0
速成版:4.17.2
索引.js
const express = require('express');
const app = express();
const ProgettoRouting = require("./routing/ProgettoRouting");
app.use("view engine","jade");
app.use(express.static("public"));
//Codifica dati json con questo middlware senza uso
//del pacchetto npm Body Parser
app.use(express.json());
//Con questo milldelware Importiamo il Router Dati
//dove risiedono le funzionalità del progetto
app.use('/route', ProgettoRouting);
//app.use(app.ProgettoRouting);
//ProgettoRouting.initialize(app);
app.listen(3000, () => {console.log("Server in ascolto sulla porta 3000")});
ProgettoRouting.js
const express = require('express');
const router = express.Router();
router.post("/",(res,req) => {
let firstName = req.body.nome;
let lastName = req.body.cognome;
let message = {nome: firstName, cognome: lastName};
res.render("index",message);
});
module.exports = router;
你需要使用
app.set("view engine","jade");
代替
app.use("view engine","jade");
因為您打算將view-engine
屬性設置為jade
,而不是設置中間件。
替換此行
app.use("view engine","jade");
到
app.set("view engine","jade");
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