Classes

ES 2009 Syntax

function myObject(property1, property2) { 
   this.property1 = property1; 
   this.property2 = property2; 
} 

var myObject = { 
   property1 : MyProp, 
   method1_dosomething : function() { 
      console.log('something');  
   }, 
   property_Literal : "MyName", 
   property2_Array : [ {arrayelement1 : "one"} {arrayelement2 : "two"} ]; 
} 

ES 2015 Syntax

Classes are just special types of functions with additional functionality.
There are two ways you can define a class: declaration or an expression.
You always need to declare your class before you use it.

Definition - Declaration

Class declarations are not hoisted (like function declarations)

class myObject { 
   constructor(property1, property2) { 
      this.property1 = property1; 
      this.property2 = property2; 
   } 

   method1_dosomething() { 
      console.log('something');  
   } 
} 

Definition - Class Expression

These can be named or unnamed

let Something = class Something { 
   constructor(myheight, mywidth) { 
      this.height = myheight; 
      this.width = mywidth; 
   } 
}; 
console.log(Something.name); 

Constructor

This is a special method used for creating and initializing the object.
A constructor can use the "super" keyword to call the constructor of the super class.
You always need to call "super" when defining the constructor of a subclass
All React component classes that have a constructor should start it with a super(props) call.

Extending / Inheriting

class myNewObject extends myObject { 
   constructor(property1) { 
      super(property1) 
   } 
} 

List Of Objects

var list = [ 
   { name: 'David', id: 42 },  
   { name: 'Steven', id: 65 }  
]; 

A empty object literal

var myObject = { }