Introduction to Node.js

Node.js® is a JavaScript runtime built on Chrome's V8 JavaScript engine. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient. Node.js' package ecosystem, npm, is the largest ecosystem of open source libraries in the world.

https://nodejs.org/en/

Node.js® is a JavaScript runtime built on Chrome's V8 JavaScript engine. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient. Node.js' package ecosystem, npm, is the largest ecosystem of open source libraries in the world.

https://nodejs.org/en/

Node.js® is a JavaScript runtime built on Chrome's V8 JavaScript engine. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient. Node.js' package ecosystem, npm, is the largest ecosystem of open source libraries in the world.

https://nodejs.org/en/

Node.js® is a JavaScript runtime built on Chrome's V8 JavaScript engine. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient. Node.js' package ecosystem, npm, is the largest ecosystem of open source libraries in the world.

https://nodejs.org/en/

Node.js® is a JavaScript runtime built on Chrome's V8 JavaScript engine. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient. Node.js' package ecosystem, npm, is the largest ecosystem of open source libraries in the world.

https://nodejs.org/en/

Node.js® is a JavaScript runtime built on Chrome's V8 JavaScript engine. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient. Node.js' package ecosystem, npm, is the largest ecosystem of open source libraries in the world.

https://nodejs.org/en/

First code

// index.js
console.log('Hello World');
$ node index.js
// index.js
const Fs = require('fs');
console.log(Fs.readdirSync('./'));

Fs.readdir('./', (err, content) => {

  console.log(err);
  console.log(content);
});

console.log('hello');
$ node index.js
// index.js
const Http = require('http');

const server = Http.createServer((req, res) => {

    res.end('hello: ' + req.url);
});

server.listen(8080);
$ node index.js

can you build a simple file serving tool?

express

$ npm init
$ npm install --save express
const Express = require('express');
const app = Express();

app.get('/hello', (req, res) => {

   res.end('hello');
});

app.get('/', (req, res) => {

    res.end('foo');
});

app.get('/bar', (req, res) => {

    res.end('bar');
});

app.listen(8080);
app.get('/hello/:name', (req, res) => {

   res.end('hello ' + req.params.name);
});

TODO: a POST route

SQLite3

$ npm i -S sqlite3

TODO: CRUD in DB

Clean repo

Controller
Service
View

Data Validation

Joi!

Check out the packages

  • Joi
  • Celebrate

Testing?

Check out the pacakges

  • lab
  • code
  • supertest

intro-nodejs

By Vladimir de Turckheim

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