[英]I am getting this error when I run run my express app
我在 Express Router 中間件上遇到類型錯誤。 以下是提到的代碼和錯誤。 有什么幫助嗎?
該應用程序運行良好,但是當我在瀏覽器中點擊 URL 時,它通過控制台中的以下錯誤。
這是我的 app.js 文件
應用程序.js
//jshint esversion:6
const express = require('express');
const bodyParser = require('body-parser');
const app = express();
app.use("view engine", "ejs");
app.get("/", function(req, res) {
// res.send("Hello");
var today = new Date();
console.log(date);
var currentDay = today.getDay();
var day = "";
console.log(currentDay);
if (currentDay === 6 || currentDay === 0) {
// res.send("yay! it's weekend. ");
day = "weekend";
} else {
day = "weekday";
}
res.render("list", {
kindOfDay: day
});
});
app.listen(3000, function() {
console.log("server started at port 3000");
});
這是 list.ejs 文件
列表.ejs
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title>to do list</title>
</head>
<body>
<h1>It's a <%= kindOfDay %>!</h1>
</body>
</html>
錯誤
E:\todoList-v1\node_modules\express\lib\router\index.js:458
throw new TypeError('Router.use() requires a middleware function but
got a ' + gettype(fn))
^
TypeError: Router.use() requires a middleware function but got a string
at Function.use (E:\todoList-v1\node_modules\express\lib\router\index.js:458:13)
at Function.<anonymous> (E:\todoList-v1\node_modules\express\lib\application.js:220:21)
at Array.forEach (<anonymous>)
at Function.use (E:\todoList-v1\node_modules\express\lib\application.js:217:7)
at Object.<anonymous> (E:\todoList-v1\app.js:6:5)
at Module._compile (internal/modules/cjs/loader.js:1133:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1153:10)
at Module.load (internal/modules/cjs/loader.js:977:32)
at Function.Module._load (internal/modules/cjs/loader.js:877:14)
at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12)
我得到了上述錯誤
這個
app.use("view engine", "ejs");
應該
app.set("view engine", "ejs");
app.use
用於應用中間件功能。 要設置 express 變量,您需要使用app.set
。 這就是您收到錯誤的原因,因為app.use
需要一個中間件函數/回調,例如function(req, res) {...}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.