Node.js

Basic NodeJS

// --------------------------- create basic server --------------------------- \\
var http = require("http");

var myServer = http.createServer(function (request, response) {
    response.writeHead(200, {"Content-type": "text/html"});
    response.write("<p><strong> hello </strong> batkan </p>");
    response.end();
});

myServer.listen(3000);

Express - basic server

var express = require("express");

var app = express();

app.get("/", function (req, res) {
    res.send("<p>Hello World</p>");
});

// will get name as dynamic parameter
app.get("/user/:name", function (req, res) {
    var name = req.params.name;
    res.send("Hello: " + name);
});

var server = app.listen(3000, function () {
    var host = server.address().address;
    var port = server.address().port;

    console.log('Example app listening at http://%s:%s', host, port);
});

node-npm commands

// --------------------------- install node packages --------------------------- \\

// initial project initilization and generation of package.json file
npm init

// install without dependency in package.json file
npm install grunt

// install with adding dependency in package.json file
npm install grunt --save

// install with adding development dependency in package.json file
npm install grunt --save-dev

// install ejs templating engine
npm install ejs --save

// --------------------------- install/switch nodejs versions --------------------------- \\

// check nodejs version
node --version

// install specific version of nodejs
nvm install 0.12

// activate specific version of nodejs
nvm use 0.10

// make specific nodejs version default
nvm alias default 0.12

//install express framework  
npm install express --save