savelee

//ES2015
function makeRequest(url, timeout = 2000, callback = function(){}) { 
  //do something
}

savelee

//ES2015
let product = "Sencha";
let myText = `${product} provides the industry's most comprehensive collection of high-performance, customizable UI widgets.
 These "widgets" include HTML5 grids, trees, lists, forms, menus, toolbars, panels, windows, and much more.
 If you don't find a widget you are looking for, hundreds of user extensions are available from the Sencha community.`;

savelee

//ES2015
function myTag(arrLiterals){ 
  return arrLiterals[0].toUpperCase(); 
}

let message = myTag`hello world!`; //HELLO WORLD!

savelee

//ES6 arrow functions
var calculate = (x,y) => {
  return x + y;
}

var sayHello = (name) => {
  return "Hello " + name;
}

//or:

savelee

//ES2015
var x = (x,x) => x;
//SyntaxError: duplicate argument names not allowed in this context

savelee

//ES2015
var foo = (x,y) => arguments[0];
foo("lee","2") //ReferenceError: arguments is not defined [Learn More]

savelee

//ES2015
function VideoGame(){
  this.title = "Uncharted";
  this.version = 3;

  setInterval(() => {
    console.log(this.title + " " + this.version++); // |this| properly refers to the VideoGame object
  }, 5000);
}

savelee

//ES5
var myobject = {
  name: "Sencha",
  logo: {
    small: {
      png: 'http://path/to/small.png',
      jpg: 'http://path/to/small.jpg'
    },
    large: {
      png: 'http://path/to/large.png',

savelee

var myarray = ["Ext JS", "GXT", "Sencha Test"];
var [myvar1, myvar2, myvar3] = myarray;

console.log(myvar1) //Ext JS
console.log(myvar2) //GXT
console.log(myvar3) //Sencha Test

savelee

//ES2015
function getVideoGame(title, version, platform) {
  return {
    title,
    version,
    platform
  };
}

getVideoGame("Uncharted", "4", "PS4")