WebSharper is an open-source and commercial web-programming framework that allows web developers to create and maintain complex JavaScript and HTML5 front-end applications in the F# programming language. Other than a few native libraries, everything is F# source. Read more...

Mocha is a JavaScript test framework for Node.js programs, featuring browser support, asynchronous testing, test coverage reports, and use of any assertion library. 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...

The following tables compare Document Object Model (DOM) compatibility and support for a number of JavaScript engines used in web browsers.

For features that are fully supported (based on DOM Level 2 or DOM Level 3 modules that are under W3C Recommendation), an exact version number is given if it is certain that the feature was added in such version. DOM Level 0 and DOM Level 3 modules that are still under development are not included. Read more...

Active Server Pages (ASP), later known as Classic ASP or ASP Classic, is Microsoft's first server-side script engine for dynamically generated web pages.

ASP.NET, first released in January 2002, has superseded ASP. Read more...

The Document Object Model (DOM) is a cross-platform and language-independent application programming interface that treats an HTML, XHTML, or XML document as a tree structure wherein each node is an object representing a part of the document. The DOM represents a document with a logical tree. Each branch of the tree ends in a node, and each node contains objects. DOM methods allow programmatic access to the tree; with them one can change the structure, style or content of a document. Nodes can have event handlers attached to them. Once an event is triggered, the event handlers get executed.

The principal standardization of DOM was handled by the World Wide Web Consortium, which last developed a recommendation in 2004. WHATWG took over development of the standard, publishing it as a living document. The W3C now publishes stable snapshots of the WHATWG standard. Read more...

Brendan Eich (/ˈaɪk/; born July 4, 1961) is an American technologist and creator of the JavaScript programming language. He co-founded the Mozilla project, the Mozilla Foundation and the Mozilla Corporation, and served as the Mozilla Corporation's chief technical officer and briefly its chief executive officer. He is the CEO of Brave Software. Read more...

* 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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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...

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...

Firebug is a discontinued free and open-source web browser extension for Mozilla Firefox that facilitated the live debugging, editing, and monitoring of any website's CSS, HTML, DOM, XHR, and JavaScript.

Firebug was licensed under the BSD license and was initially written in January 2006 by Joe Hewitt, one of the original Firefox creators. The Firebug Working Group oversees the open source development and extension of Firebug. It had two major implementations: an extension for Mozilla Firefox and a bookmarklet implementation called Firebug Lite which can be used with Google Chrome. Read more...

Visual Studio Code is a source-code editor developed by Microsoft for Windows, Linux and macOS. It includes support for debugging, embedded Git control, syntax highlighting, intelligent code completion, snippets, and code refactoring. It is also customizable, so users can change the editor's theme, keyboard shortcuts, and preferences. The source code is free and open source and released under the permissive MIT License. The compiled binaries are freeware and free for private or commercial use.

Visual Studio Code is based on Electron, a framework which is used to deploy Node.js applications for the desktop running on the Blink layout engine. Although it uses the Electron framework, the software does not use Atom and instead employs the same editor component (codenamed "Monaco") used in Azure DevOps (formerly called Visual Studio Online and Visual Studio Team Services). 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...

There are many JavaScript frameworks available. The intention of this comparison is to show some examples of notable JavaScript frameworks. Read more...

Komodo IDE is an integrated development environment (IDE) for dynamic programming languages. It was introduced in May 2000. Many of Komodo's features are derived from an embedded Python interpreter.

Komodo IDE uses the Mozilla and Scintilla code base as they share many features and support the same languages (including Python, Perl, PHP, Ruby, Tcl, SQL, Smarty, CSS, HTML and XML) and operating systems (Linux, OS X, and Windows). The editor component is implemented using the Netscape Plugin Application Programming Interface (NPAPI), with the Scintilla view embedded in the XML User Interface Language (XUL) interface in the same manner as a web browser plugin. Read more...

Jest is a JavaScript Testing Framework with a focus on simplicity. It works with projects using: Babel, TypeScript, Node.js, React, Angular and Vue.js. It aims to work out of the box, config free, 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...

This is a list of notable JavaScript libraries. Read more...

Cascading Style Sheets (CSS) is a style sheet language used for describing the presentation of a document written in a markup language like HTML. CSS is a cornerstone technology of the World Wide Web, alongside HTML and JavaScript.

CSS is designed to enable the separation of presentation and content, including layout, colors, and fonts. This separation can improve content accessibility, provide more flexibility and control in the specification of presentation characteristics, enable multiple web pages to share formatting by specifying the relevant CSS in a separate .css file, and reduce complexity and repetition in the structural content. 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...