Grundkurs i Node.js

Background and Overview

• History
• Ryan Dahl
• Properties
• Architecture
• Wrapping the LINUX system API
• Installation of NodeJS and NPM
• Running the REPL
• Running script files
• NodeJS API documentation

Some NodeJS Programs

• Simple arithmetics and print-outs
• Writing to files
• Reading from files
• Processing files
• Simple HTTP client
• Simple HTTP server

Understanding Modules

• What is a module
• Different JS module systems
• Understanding the CommonJS/NodeJS module system
• Defining a module
• Requiring a module
• How NodeJS performs module lookup
• Module file search order

NodeJS Basic API

• Script name and location
• The console object
• Using the os module
• Assertions

Asynchronous Execution

• What is asynchronous execution
• Using calls-backs
• The boomerang effect
• Call-back chains
• Understanding promises
• Working with promise chains
• Async functions using await in ES6
• Handling errors with async/await

JavaScript Execution Model

• JavaScript engines
• Understanding the call-stack and stack-frames
• Invocation of asynchronous function blocks
• The JS event-loop
• A model for understanding how JS executes
• Using Loupe to visualize JS execution
• The NodeJS nested event-loops

Delayed Execution

• Using setTimeout
• Cancelling
• Using setInterval
• Understanding process.nextTick()

Process

• The process object
• Platform meta-data
• Standard I/O, stdin, stdout and stderr
• Terminating the execution
• Exit handlers
• Getting command-line arguments
• Getting environment variables
• Handling LINUX signals

Buffer

• The purpose of the Buffer class
• Creating Buffer objects
• Character encoding, ASCII, UTF8, Base64
• Decoding buffers
• Accessing characters
• Slicing buffers
• Copying buffers

Working with Files

• The fs module
• Understanding difference between asynchronous and synchronous file operations
• Getting file meta-data
• Manipulating file paths
• Opening and closing a file
• Reading from a file
• Writing to a file

EventEmitter

• How the event-emitter pattern prevents the boomerang effect
• Event types
• Creating event-emitters
• Registering call-backs
• Emitting events

Understanding Streams

• Streams and event-emitters
• Readable streams
• Writable streams
• Ending streams
• Pausing and resuming streams
• Draining streams
• NodeJS stream pipes
• Copying streams
• Line-oriented text processing
• Module readline
• Using NPM
• What is NPM
• Installing packages
• Configuration
• Understanding package.json
• Dependencies vs. dev-dependencies
• Searching for NPM libraries
• Useful NPM commands
• NPM scripts
• Using NPM as a build tool

HTTP Client

• Understanding HTTP
• Creating an outgoing TCP connection
• Making an outgoing HTTP request
• Using the request module
• Sending a JSON payload

HTTP Server

• A simple HTTP server
• Piping data
• Serving static (asset) files
• Using connect middleware
• Logging
• Handling errors
• Parsing query strings
• Parsing request bodies
• Receiving JSON payload

Using Express

• What is Express.js
• Routes
• Build a REST WS server with express
• Handling JSON payload

Using Socket.IO

• What is web-sockets
• Installing and configuring socket.io
• Building a simple chat system using socket.io

The NodeJS Eco-System

• GulpJS build tool
• Bower UI library dependency manager
• Testing runners and frameworks
• RxJS
• NodeJS in embedded systems