Javascript INTRO

Javascript code is the most portable, reusable code around. It is the single language that lets you write code that runs natively on both client and server

Typical modern JS Application Infrastructure 

DATA STORE 

a VPN OR A  FIREWALL  for protection   

 JSON Web service layer

- various 3rd party API
               |
an app server / cms to route requests and deliver pages to client 

a static CND - CONTENT DELIVERY NETWORK - for cached files (img css js clientside templates)

the client - browser 

JSON 

The format is nearly identical to javascript's object literal syntax with a couple important differences

• All attributes names and string values must be enclosed in double quotes. Other values may appear in their literal form.
• JSON records cannot contain circular references.
• JSON cannot contain functions.

NOSQL  DATA STORES 

Before XML and JSON narly all web services were