what is ECMAScript ?

 

ECMAScript is a scripting language specification developed by the

European Computer Manufacturers Association (ECMA). It is widely

used for client-side scripting on the World Wide Web, and is the

basis for several programming languages including JavaScript.

ECMAScript defines the core features of the scripting language,

including syntax, types, objects, and control structures.

It also specifies the runtime environment in which the code

executes, including the execution context, scope chain, and

variable declaration and instantiation rules.

The first version of ECMAScript, known as ECMAScript 1,

was released in 1997. Since then, several new versions

have been released, each adding new features and functionality

to the language. ECMAScript 6 (ES6), also known as ECMAScript 2015,

introduced significant changes to the language, including the

introduction of new syntax, modules, classes, and arrow functions.

JavaScript is an implementation of the ECMAScript specification,

and is the most widely used implementation of the language. Other

popular implementations of ECMAScript include ActionScript, JScript,

and TypeScript.