NodeJS：TypeError：app.use 不是 function

Question

I am going through the tutorials of Nodejs for Connect module.

i have written this code:

var http = require('http');
var app = require('connect');
function doFirst(request, response, next) {

    console.log('doFirst');
    next();
}
function doSecond(request, response, next) {

    console.log('doFirst');
    next();
}
app.use(doFirst);
app.use(doSecond);
http.createServer(app).listen(8888);

and while running this application facing issue:

C:\Users\sparsh\eclipse-workspace\Delete\ConnectServer.js:13
app.use(doFirst);
    ^

TypeError: app.use is not a function
    at Object.<anonymous> (C:\Users\sparsh\eclipse-workspace\Delete\ConnectServer.js:13:5)
    at Module._compile (module.js:569:30)
    at Object.Module._extensions..js (module.js:580:10)
    at Module.load (module.js:503:32)
    at tryModuleLoad (module.js:466:12)
    at Function.Module._load (module.js:458:3)
    at Function.Module.runMain (module.js:605:10)
    at startup (bootstrap_node.js:158:16)
    at bootstrap_node.js:575:3

Please help

Answer 1

As jfriend00 mentioned in the comments: Use express ;)

But to answer your question. require( 'connect' ) returns a function. What you need to do is:

var http = require('http');
var connect = require('connect');

var app = connect();
// ...

Also see the npm package here

Answer 2

Before declaring app.use you have to:

var app = app();

OR better

var connect = require("connect");

var app = connect();

Answer 3

Just replace the first two line using the below code:

var connect = require('connect');
var http = require('http');

var app = connect();

For more details please read here

Answer 4

Try this:

const connect = require('connect');
const http = require('http');

const app = connect();

app.use(doFirst);
app.use(doSecond);