小编ign*_*ill的帖子

我正在关注有关如何呈现 HTML 页面的NodeJS 教程，但我似乎无法使其工作。我安装了所有要求并使用了该--save选项，因此它位于我的node_modules文件夹中。在我npm start访问我的后localhost，这是我收到的错误消息：

Error: No default engine was specified and no extension was provided.
        at new View (C:\Users\Billy\NodeJSProjects\HelloWorld\node_modules\express\lib\view.js:62:11)
        at EventEmitter.render (C:\Users\Billy\NodeJSProjects\HelloWorld\node_modules\express\lib\application.js:570:12)
        at ServerResponse.render (C:\Users\Billy\NodeJSProjects\HelloWorld\node_modules\express\lib\response.js:966:7)
        at app.get (C:\Users\Billy\NodeJSProjects\HelloWorld\app\index.js:25:12)
        at Layer.handle [as handle_request] (C:\Users\Billy\NodeJSProjects\HelloWorld\node_modules\express\lib\router\layer.js:95:5)
        at next (C:\Users\Billy\NodeJSProjects\HelloWorld\node_modules\express\lib\router\route.js:137:13)
        at Route.dispatch (C:\Users\Billy\NodeJSProjects\HelloWorld\node_modules\express\lib\router\route.js:112:3)
        at Layer.handle [as handle_request] (C:\Users\Billy\NodeJSProjects\HelloWorld\node_modules\express\lib\router\layer.js:95:5)
        at C:\Users\Billy\NodeJSProjects\HelloWorld\node_modules\express\lib\router\index.js:281:22
        at Function.process_params (C:\Users\Billy\NodeJSProjects\HelloWorld\node_modules\express\lib\router\index.js:335:12)

./index.js

require('./app/index')

const path = require('path')
const express = require('express')
const exphbs = require('express-handlebars')


const app = express()

app.engine('.hbs', exphbs({ …