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JavaScript

Summary

JavaScript is the scripting language of the Web, enabling us to implement all kinds of powerful dynamic features.

The usage of JavaScript is not limited inside browsers. You can use it in server and console environments with Node.js, Rhino, or SpiderMonkey, or run it as an embedded language such as the JavaScript engine inside Java.

Note: If you are completely new to web development, you may want to review our Beginners section.

Language: English

In This Section

Objects
Provides a list of objects with links to information about each object.
Constants
Provides a list of constants and links to information about each constant.
Properties
Provides a list of properties with links to information about each property.
Functions
Provides a list of functions with links to information about each function.
Methods
Provides a list of methods with links to information about each method.
Operators
Provides a list of operators with links to information about each operator.
Statements
Provides a list of statements with links to information about each statement.
JavaScript Directives
Includes links to directives.
JavaScript Reserved Words
Provides a list of reserved words. These words may not be used as identifiers.
JavaScript Future Reserved Words
Provides a list of future reserved words. These words may not be used as identifiers.


Background

JavaScript is the scripting language of the web, allowing you to add dynamic behaviour to web documents. It was originally used for simple DOM manipulation, style switching and animated effects, but in recent times it has become so much more, with the advent of powerful APIs through the HTML5 specification, and the popularity of 3rd party libraries and applications such as jQuery, Node.js, Backbone.js and many others.

  • First version: The first official version of JavaScript was called LiveScript, and shipped in Netscape Navigator 2.0 in 1995.
  • Current stable version: JavaScript is based on the ECMAScript specification, published by Ecma international. ECMAScript version 5.1 is seen as the current stable version.
  • Current and future work: ECMAScript version 6 is currently being worked on, but the development of JavaScript goes far beyond that. There are new APIs being worked on all the time, in places such as the W3C HTML working group, and new JavaScript libraries appear all the time, on places like Github.

Contributing to the JavaScript technology

The standardisation of the ECMAScript language is handled by ECMA TC39, and is called project harmony, see TC39 latest work. The best place to go to find out more is the ECMAScript development homepage.

To contribute to other JavaScript-related technologies such as HTML5, jQuery, and other 3rd party libraries and frameworks, search for the appropriate working group, core team or developers!

Index of all JavaScript topics






Attribution

This article contains content originally from external sources.

Portions of this content come from the Microsoft Developer Network: Windows Internet Explorer JavaScript reference Article