javascript - Node.js Express 模块导出

Question

我收到这个错误

app.get is not a function

这是我的 config/express.js

var express = require('express');


    module.exports = function(){

    var app = express();

    app.set('port',3000);

    return app;

    };

这是我的 server.js

var http = require ('http');

var app = require ('./config/express');


http.createServer(app).listen(app.get('port'), function(){

    console.log("Express Server Runing on port"+ app.get('port'));


});

我做错了什么？

Answer 1

在 config/express.js 中导出一个函数，但将其用作应用程序。试试这个:

var express = require('express');
var app = express();
app.set('port', 3000);
module.exports = app;

编辑:但以下是首选:

/* config/express.js */
var express = require('express');
module.exports = function() {
  var app = express();
  app.set('port', 3000);
  return app;
};


/* server.js */
var http = require('http');
var app = require('./config/express')(); // Notice the additional () here

http.createServer(app).listen(app.get('port'), function() {
    console.log("Express Server Runing on port"+ app.get('port'));
});