Express-handlebars错误- HandleBars不是函数

Question

我一直收到“app.engine(‘handlebar’，handlebar())；输入错误‘handlebar’不是一个函数?我的代码有什么问题吗？”

const express = require('express');

const nodemailer = require("nodemailer");
const paths = require('path'); 
const handlebars = require('express-handlebars')



const app = express();
require("dotenv").config();

//View engine setup
app.set("view engine", 'handlebars');
app.engine('handlebars', handlebars());

//Static Folder
app.use('/public', express.static(path.join(__dirname, 'public')))


//Body Parser MiddleWars;

app.use(express.urlencoded({extended: false}));
app.use(express.json())
const port = 3001;
app.listen(port, () => { 
    console.log(`Server is running on port: ${port}`); 
}); 

Answer 1

根据express-handlebars提供的示例，您必须从模块导入engine函数：

(使用导入)

import express from 'express';
import { engine } from 'express-handlebars';

const app = express();

app.engine('handlebars', engine());
app.set('view engine', 'handlebars');
app.set("views", "./views");

app.get('/', (req, res) => {
    res.render('home');
});

app.listen(3000);

因此，您应该调用handlebars.engine，而不是直接调用handlebars。

总而言之：

const express = require('express');

const nodemailer = require("nodemailer");
const paths = require('path'); 
const handlebars = require('express-handlebars')



const app = express();
require("dotenv").config();

//View engine setup
app.set("view engine", 'handlebars');
app.engine('handlebars', handlebars.engine());

//Static Folder
app.use('/public', express.static(path.join(__dirname, 'public')))


//Body Parser MiddleWars;

app.use(express.urlencoded({extended: false}));
app.use(express.json())
const port = 3001;
app.listen(port, () => { 
    console.log(`Server is running on port: ${port}`); 
});