* Eclipse Platform is the core framework that all other Eclipse projects are built on.

• Java development tools (JDT) provides support for core Java SE. This includes a standalone fast incremental compiler.
• Plug-in Development Environment (PDE) provides tools to create, develop, test, debug, build and deploy Eclipse plug-ins, fragments, features, update sites and RCP products.
• Orion, CHE, Dirigible and Theia are browser-based IDEs and open tool integration platform which is entirely focused on developing for the web, in the web. Tools are written in JavaScript and run in the browser.

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Light Table is an integrated development environment for software engineering developed by Chris Granger and Robert Attorri. It features real-time feedback allowing instant execution, debugging and access to documentation. The instant feedback provides an execution environment intended to help developing abstractions.

The development team attempted to create a program which shows the programmer what the effects of their additions are in real-time, rather than requiring them to work out the effects as they write the code. Though the program began by supporting only Clojure, it has since aimed to support Python and JavaScript. The developers claim that the software can reduce programming time by up to 20%. Read more...

Microsoft Visual Studio Express is a set of integrated development environments (IDEs) developed by Microsoft as a freeware and registerware function-limited version of the non-free Microsoft Visual Studio. Express editions started with Visual Studio 2005.

Visual Studio Express was supplanted by the Visual Studio Community edition, which is also available for free. but with different license. Compared to Visual Studio Express, the new license is more friendly to open-source but less for some closed source developers. The community edition works with plugins, a feature that was previously exclusive to the paid editions (Professional and higher). Express editions of Visual Studio 2015 are, however, still available for the time being. A final version was released in 2017. Read more...

John Resig is an American software engineer and entrepreneur, best known as the creator and lead developer of the jQuery JavaScript library. Read more...

Atom is a free and open-source text and source code editor for macOS, Linux, and Microsoft Windows with support for plug-ins written in Node.js, and embedded Git Control, developed by GitHub. Atom is a desktop application built using web technologies. Most of the extending packages have free software licenses and are community-built and maintained. Atom is based on Electron (formerly known as Atom Shell), a framework that enables cross-platform desktop applications using Chromium and Node.js. It is written in CoffeeScript and Less. It was able to be used as an integrated development environment (IDE), until that feature was 'retired' in December 2018. Atom was released from beta, as version 1.0, on 25 June 2015. Its developers call it a "hackable text editor for the 21st Century". Read more...

CoffeeScript is a programming language that transcompiles to JavaScript. It adds syntactic sugar inspired by Ruby, Python and Haskell in an effort to enhance JavaScript's brevity and readability. Specific additional features include list comprehension and pattern matching.

CoffeeScript support is included in Ruby on Rails version 3.1 and Play Framework. In 2011, Brendan Eich referenced CoffeeScript as an influence on his thoughts about the future of JavaScript. Read more...

AtScript was a proposed JavaScript-based scripting language extending Microsoft's TypeScript and transcompiling to JavaScript. It was introduced in October 2014 at the ng-Europe conference by the developers of Google's AngularJS web development framework as the language that the upcoming Angular 2.0 would be built with.

AtScript was originally intended to run on top of TypeScript, while including some features from Dart. In October 2014, Google announced that Angular 2.0 would be written in AtScript. In March 2015, Microsoft announced that many of AtScript's features would be implemented in the TypeScript 1.5 release, and that Angular 2.0 would be built on pure TypeScript. Read more...

JetBrains PhpStorm is a commercial, cross-platform IDE (integrated development environment) for PHP built on JetBrains' IntelliJ IDEA platform.

PhpStorm provides an editor for PHP, HTML and JavaScript with on-the-fly code analysis, error prevention and automated refactorings for PHP and JavaScript code. PhpStorm's code completion supports PHP 5.3, 5.4, 5.5, 5.6, 7.0, 7.1, and 7.2 (modern and legacy projects), including generators, coroutines, the finally keyword, list in foreach, namespaces, closures, traits and short array syntax. It includes a full-fledged SQL editor with editable query results. Read more...

Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft. It is used to develop computer programs, as well as websites, web apps, web services and mobile apps. Visual Studio uses Microsoft software development platforms such as Windows API, Windows Forms, Windows Presentation Foundation, Windows Store and Microsoft Silverlight. It can produce both native code and managed code.

Visual Studio includes a code editor supporting IntelliSense (the code completion component) as well as code refactoring. The integrated debugger works both as a source-level debugger and a machine-level debugger. Other built-in tools include a code profiler, forms designer for building GUI applications, web designer, class designer, and database schema designer. It accepts plug-ins that enhance the functionality at almost every level—including adding support for source control systems (like Subversion and Git) and adding new toolsets like editors and visual designers for domain-specific languages or toolsets for other aspects of the software development lifecycle (like the Team Foundation Server client: Team Explorer). Read more...

Brackets is a source code editor with a primary focus on web development. Created by Adobe Systems, it is free and open-source software licensed under the MIT License, and is currently maintained on GitHub by Adobe and other open-sourced developers. It is written in JavaScript, HTML and CSS. Brackets is cross-platform, available for macOS, Windows, and most Linux distributions. The main purpose of brackets is its live HTML, CSS and JavaScript editing functionality.

On November 4, 2014, Adobe announced the first (1.0) release of Brackets. The update introduced new features such as custom shortcut key combinations and more accurate JavaScript hinting. Brackets has a major focus on development in JavaScript, CSS and HTML. With release of version 1.0 Adobe announced a feature that extracts design information from a PSD file for convenience of coding in CSS. As of June 28, 2016, the feature is officially discontinued, due to "low usage". However, Extract is still available via Photoshop and Dreamweaver, both of which are part of their paid service, Adobe Creative Cloud. The latest version release of Brackets is 1.13. Read more...

Haxe is a high-level cross-platform multi-paradigm programming language and compiler that can produce applications and source code, for many different computing platforms, from one code-base. It is free and open-source software, distributed under the GNU General Public License (GPL) version 2, and the standard library under the MIT License.

Haxe includes a set of common functions that are supported across all platforms, such as numeric data types, text, arrays, binary and some common file formats. Haxe also includes platform-specific application programming interface (API) for Adobe Flash, C++, PHP and other languages. OpenFL, Kha, Heaps and Flambe are popular Haxe frameworks that enable creating multi-platform content from one codebase. Read more...

Safari is a graphical web browser developed by Apple, based on the WebKit engine. First released on desktop in 2003 with Mac OS X Panther, a mobile version has been bundled with iOS devices since the iPhone's introduction in 2007. Safari is the default browser on Apple devices. A Windows version was available from 2007 to 2012. Read more...

QUnit is a JavaScript unit testing framework. Originally developed for testing jQuery, jQuery UI and jQuery Mobile, it is a generic framework for testing any JavaScript code. It supports client-side environments in web browsers, and server-side (e.g. Node.js).

QUnit's assertion methods follow the CommonJS unit testing specification, which itself was influenced to some degree by QUnit. Read more...

Nim (formerly named Nimrod) is an imperative, multi-paradigm, compiled programming language designed and developed by Andreas Rumpf. It is designed to be "efficient, expressive, and elegant", supporting metaprogramming, functional, message passing, procedural, and object-oriented programming styles by providing several features such as compile time code generation, algebraic data types, a foreign function interface (FFI) with C and compiling to JavaScript, C, and C++. Read more...

Ace (from Ajax.org Cloud9 Editor) is a standalone code editor written in JavaScript. The goal is to create a web-based code editor that matches and extends the features, usability, and performance of existing native editors such as TextMate, Vim, or Eclipse. It can be easily embedded in any web page and JavaScript application. Ace is developed as the primary editor for Cloud9 IDE and as the successor of the Mozilla Skywriter project.

MediaWiki also uses Ace Read more...

An ECMAScript engine is a program that executes source code written in a version of the ECMAScript language standard, for example, JavaScript.

These are new generation ECMAScript engines for web browsers, all implementing just-in-time compilation (JIT) or variations of that idea. The performance benefits for just-in-time compilation make it much more suitable for web applications written in JavaScript. Read more...

Dart is a general-purpose programming language originally developed by Google and later approved as a standard by Ecma (ECMA-408). It is used to build web, server, desktop, and mobile applications.

Dart is an object-oriented, class defined, garbage-collected language using a C-style syntax that transcompiles optionally into JavaScript. It supports interfaces, mixins, abstract classes, reified generics, static typing, and a sound type system. Read more...

The syntax of JavaScript is the set of rules that define a correctly structured JavaScript program.

The examples below make use of the log function of the console object present in most browsers for standard text output. Read more...

Jasmine is an open source testing framework for JavaScript. It aims to run on any JavaScript-enabled platform, to not intrude on the application nor the IDE, and to have easy-to-read syntax. It is heavily influenced by other unit testing frameworks, such as ScrewUnit, JSSpec, JSpec, and RSpec. Read more...