Commonly Used javascript references

JavascriptReference.md

Sandbox

babel-node
.editor

ES6

New Goodies

• Default args
• Arrow function
• Let - value within block scope
• Template literals

let greet = (greeting, name = "john") =>
  console.log(`${greeting} ${name}`);

greet("Heyo", "Mike");  // Heyo Mike
greet("Hiya");  // Hiya john

• Object enhancements

let color = "red";
let speed = 10;

let car = {
  color,
  speed,
  go(){ console.log("vroom") }
}

car.go();

• Classes

class Animal { 
  constructor(name) {
    this.name = name;
  }
  
  speak() {
    console.log(this.name + ' makes a noise.');
  }
}

class Dog extends Animal {
  speak() {
    console.log(this.name + ' barks.');
  }
}

• spread operator - explode array into individual elements

let first = [1, 2, 3]
let second = [4, 5, 6]

first.push(...second)

• destructuring

var { color } = { color: blue }
console.log(color) // blue

Coffee Classes

class Dog extends Animal
  constructor: (@name) ->

  speak: ->
    console.log(@name + ' barks.')

Javascript Testing

handleMethodSpy = sinon.spy()
link = sinon.stub()

expect(handleMethodSpy).to.have.been.calledWith(link)

querySpy = sinon.spy(Keen, "Query")
querySpy.restore()