kevinchisholm/_express-js-introduction.md

## _express-js-introduction.md

      
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              _express-js-introduction.md
            
          
Code Examples for my Blog Post: Introduction to Express.js, the Node.js web application framework

The full Github repo can be found here: Introduction to Express.js, the Node.js web application framework


## example-1.js
//reuire the express nodejs module
var express = require('express'),
	//set an instance of exress
	app = express();

//for any requests to the root of the application
app.get('/', function (req, res) {
	//construct the HTML that we will return
	var HTML = ''
	+ '<!DOCTYPE html>'
	+ '<html>'
		+ '<head>'
			+ '<meta charset=utf-8>'
			+ '<title>Express.js example</title>'
		+ '</head>'
		+ '<body>'
			+ '<h1>This is example # 1</h1>'
		+ '</body>'
	+ '</html>';

	//rethrn the HTML to the user's browser
	res.send(HTML);
});

//wait for a connection
app.listen(3000, function () {
  console.log('Server is running. Point your browser to: http://localhost:3000');
});

## example-2.js
//reuire the express nodejs module
var express = require('express'),
	//set an instance of exress
	app = express(),
	//reuire the path nodejs module
	path    = require("path");

//tell express that www is the root of our public web folder
app.use(express.static(path.join(__dirname, 'www')));

//wait for a connection
app.listen(3000, function () {
  console.log('Server is running. Point your browser to: http://localhost:3000');
});

## example-3.js
//reuire the express nodejs module
var express = require('express'),
	//set an instance of exress
	app = express(),
	//reuire the path nodejs module
	path    = require("path");

//tell express that www is the root of our public web folder
app.use(express.static(path.join(__dirname, 'www')));

//tell express what to do when the /about route is requested
app.get('/about',function(req,res){
  res.sendFile(path.join(__dirname + '/www/about.html'));
});

//wait for a connection
app.listen(3000, function () {
  console.log('Server is running. Point your browser to: http://localhost:3000');
});

## package.json
{
  "dependencies": {
    "express": "4.14.0"
  }
}
	//reuire the express nodejs module
	var express = require('express'),
	//set an instance of exress
	app = express();

	//for any requests to the root of the application
	app.get('/', function (req, res) {
	//construct the HTML that we will return
	var HTML = ''
	+ '<!DOCTYPE html>'
	+ '<html>'
	+ '<head>'
	+ '<meta charset=utf-8>'
	+ '<title>Express.js example</title>'
	+ '</head>'
	+ '<body>'
	+ '<h1>This is example # 1</h1>'
	+ '</body>'
	+ '</html>';

	//rethrn the HTML to the user's browser
	res.send(HTML);
	});

	//wait for a connection
	app.listen(3000, function () {
	console.log('Server is running. Point your browser to: http://localhost:3000');
	});