Javascript module.export函数指针的结构

Question

I'm getting the following when I run my node app:

Error: Route.post() requires callback functions but got a [object Undefined]

I have the following in my app.js file:

const express = require('express')
const path = require('path')
const port = process.env.PORT || 3000
const app = express()

// imports
var bodyParser = require('body-parser');
var api = require('./api/controllers/apiController.js');

// serve static assets normally
app.use(express.static(__dirname + '/public'))

// support json encoded bodies
app.use(bodyParser.json());
// support encoded bodies
app.use(bodyParser.urlencoded({ extended: true }));

console.log(api);    

app.post('/api/newFoo', api.newFoo);

And in my apiController file, I export the following:

function newFoo(req, res, next) {

}

function getFoo(req, res, next) {

}

function newBar(req, res, next) {

}

function getBar(req, res, next) {

}

module.exports = {
  newFoo: newFoo,
  getFoo: getFoo,
  newBar: newBar,
  getBar: getBar
};

What am I doing wrong in exporting my functions as a dictionary, where they are not being recognized as function pointers?

It works fine when I do the following for each function:

module.exports.newFoo = function(req, res, next) {};

And my console output for console.log(api.newFoo) is [Function] and gives me typeof as "function" but the original method in question results in [newFoo : Function] which returns typeof as "undefined"

Answer 1

server.js main file runing on {node server.js}

`const express = require('express')
const path = require('path')
const port = process.env.PORT || 3000
const app = express()

var bodyParser = require('body-parser');
var api = require('./apiController.js');
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));

console.log(api.getFoo); //--->[Function: newFoo] worked for me 
console.log(typeof(api.getFoo)); //===> function
app.post('/api/getFoo', api.getFoo);
app.listen(port) `

by listening on an port have tried with postman also it worked for me

---

apiController.js file this is requiring on the server

function getFoo(req, res, next) {
console.log("2st function");
}
module.exports = {
  getFoo: getFoo
}

• node -v 8.1.2
• npm -v 5.0.2
• expressjs -v 4.15.0