Difference between Ecmascript & Javascript

• Ecma Internation is an organisation that create standard for technologies.
• ECMA-262 is standards published by Ecma International. It contains specifications for creating any general purpose scripting language.
• Scripting language must observe the rules, details and guide-lines provided by ECMA-262 to considered Ecma Script compliant.

• Javascript is the dialect of the Ecma script language.
• A general purpose scripting language that conforms to Ecma script specifications

Javascript Engine / Javascript Interpreter

• A program or interpreter that understands and executes Javascript codes.
• Javascript Engine commonly found in web browsers are…
  - V8 : Google Chrome, Node Js, Opera
  - SpiderMonkey : Mozilla Firefox
  - Chakra : Microsoft Edge
  - Javascript Core : Safari, Webkit, Qt 5

EcmaScript6 / ES6 is the sixth edition of the ECMA-262 standard, features, major changes and improvements to the Ecma script specification.