learning-javascript.md

Before to start

In JavaScript there is NO concept of Class.

Everything is an Object.

Inheritance between objects is achieved with a mechanism known as Prototypal Inheritance.

We can create Objects and then link them together OLOO (Objects-Linked-to-Other-Objects).

JavaScript Documentation

• A re-introduction to JavaScript (JS tutorial)
• Introducing JavaScript objects
• Eloquent JavaScript
• You Don't Know JS
• JavaScript Allonge
• Professor Frisby's Mostly Adeguate Guide to Functional Programming
  • Functional Programming with JavaScript Object Arrays

Things that catched my attention

• JavaScript For Beginners: the ‘new’ operator
• Export and Import
  • Export Multiple Classes in ES6
• JavaScript Strict Mode

Other resources

• Compatibility Matrix Node/ES6
• Compare the differences between ES6 and ES5
  • ES6 stands for ECMAScript 6 (a.k.a. ECMAScript 2015)

Testing JavaScript

• JavaScript Unit Testing for Beginners
• Video about Setting up Unit Testing with Mocha and Chai
• Video about Unit Testing With Mocha and Chai
• Ended up with Chai as assertions library, and Mocha as test runner
  • Discovered that Chai allows three different assertion styles (Should, Expect and Assert). It's just a matter of style.
  • But there is also another Testing Framework to experiment with, Jest.
• An Overview of JavaScript Testing in 2019

Extensions or Resources about VSCode

• Chai Snippets
• Recommended Extensions
• Refactoring JavaScript
• JS Refactor

1. My First Test "Hello World"

• npm init
• Hello World Test

2. Katas

• Bowling Game Kata
  • DONE in JavaScript
• Roman Numerals Kata
  • TODO
• String Calculator Kata - Only Part I
  • TODO
• Salary Slip Kata
  • TODO (Test Double?)
• Bank Kata
  • TODO (Test Double?)

3. A simple application

Starting from the Bank Kata, build a simple frontend application, store data and deploy it somewhere.

Nice to learn

• Coverage tools
• How to test the frontend code (interaction with the DOM, etc ...)

Challenge

• Pair session with experienced people on an open source project