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Free JavaScript Editor. Free JavaScript Editor (Ajax Editor), Validator and Debugger for beginners and professionals. AJAX developers can use free javascript editor as Free Ajax Editor. First specialized Free JavaScript Editor allowing to create, edit and test ajax scripts. It is included in Visual Studio 2015. TypeScript is a language for application-scale JavaScript. TypeScript adds optional types, classes, and modules to JavaScript. TypeScript supports tools for large-scale JavaScript applications for any browser, for any host, on any OS. TypeScript compiles to clean, readable, standards-based JavaScript. Quick Installer for Windows, Linux, MAC OS X (253 MB) Slim (212 MB) For other Oracle WebLogic Server releases subject to this free license, including,, 12.1.3, and 10.3.6 for Oracle Fusion Middleware 11g products: See All Free WebLogic Server for Developer downloads.

TypeScript code converts to JavaScript, which runs anywhere JavaScript runs: In a browser, on Node.js or Deno and in your apps. Safety at Scale TypeScript understands JavaScript and uses type inference to give you great tooling without additional code. Download JavaScript CoverFlow 2.0 (jCoverFlow) for free. This is a pure JavaScript implementation of the Apple iTunes CoverFlow effect. It works by using the Canvas element to render all of the angles, positions and reflections.

ECMAScript is the scripting language that forms the basis of JavaScript. ECMAScript standardized by the ECMA International standards organization in the ECMA-262 and ECMA-402 specifications. The following ECMAScript standards have been approved or are being worked on:

NameLinksRelease dateDescription
Current editions
ECMA-262 11th Edition

PDF, HTML, Working draft, repository

2020ECMAScript 2020 Language Specification
ECMA-262 10th Edition

PDF, HTML, Working draft, repository

2019ECMAScript 2019 Language Specification
ECMA-262 9th Edition

Working draft, repository

2018ECMAScript 2018 Language Specification
ECMA-402 5th EditionWorking draft, repository2018ECMAScript 2018 Internationalization API Specification
Obsolete/historical editions
ECMA-262PDFJune 1997 ECMAScript: A general purpose, cross-platform programming language. This was the first version of the ECMAScript standard.
ECMA-262 2nd EditionPDFAugust 1998 ECMAScript Language Specification. This is the second revision of the ECMAScript standard; also ISO standard 16262.
ECMA-262 3rd EditionPDFDecember 1999 ECMAScript Language Specification. This is the third revision of the ECMAScript standard; corresponds to JavaScript 1.5.
See also the errata
ECMA-262 5th EditionPDFDecember 2009 ECMAScript Language Specification. This is the fifth revision of the ECMAScript standard.
See also the ES5 errata and ECMAScript 5 support in Mozilla
ECMA-262 5.1 EditionPDF, HTMLJune 2011 This version is fully aligned with the third edition of the international standard ISO/IEC 16262:2011.
It includes ES5 errata fixes, no new features.
ECMA-402 1st EditionPDF, HTMLDecember 2012ECMAScript Internationalization API Specification
ECMA-262 6th EditionPDF, HTMLJune 2015ECMAScript 2015 Language Specification
ECMA-402 2nd EditionPDFJune 2015ECMAScript 2015 Internationalization API Specification
ECMA-262 7th EditionHTMLJune 2016ECMAScript 2016 Language Specification
ECMA-402 3rd EditionHTMLJune 2016ECMAScript 2016 Internationalization API Specification
ECMA-262 8th EditionHTMLJune 2017ECMAScript 2017 Language Specification
ECMA-402 4th EditionHTMLJune 2017ECMAScript 2017 Internationalization API Specification

ES.Next is a dynamic name that refers to whatever the next version is at the time of writing. ES.Next features are more correctly called proposals, because, by definition, the specification has not been finalized yet.

Javascript 2.0 Download

See Wikipedia ECMAScript entry for more information on ECMAScript history.

Related resources

There are a variety of ways you can participate in or just track current work on the ECMAScript Language Specification and the ECMAScript Internationalization API Specification and related resources:

ResourceDescription Language Specification repo Internationalization API Specification repo proposals repo conformance test suite repo spec discussion; current mailing list spec discussion; historical mailing-list archives (until March 2021)

Practice your JavaScript coding skills, and look for errors in the code with the help of this simplistic yet efficient JavaScript scratchpad

What's new in RunJS 2.2.0 Pre-release:

  • Add ability to set tab titles.
  • Remove need for restart from activation/deactivation.
  • Move deactivation button to Manage License dialog.
  • Upgraded Node to 16.9.1.
Read the full changelog

When it comes to writing and testing JavaScript code there’s really no shortage of very good options out there. Be that as it may, code editors usually tend to be obnoxiously feature-packed, not the best solution for beginners as well as for developers that just want to try out new simple things in JavaScript.

The solution to this problem might come in the form of RunJS, a super-minimalist JavaScript scratchpad that provides an accessible and non-intimidating way of writing and testing JavaScript code directly from your computer’s desktop.

Simple JS editor that can be used by beginners and experts alike

As mentioned before, the whole idea behind this app is to be as simple as possible. Hence, the app has a non-pretentious GUI with only two panels (one for writing the code, and one for previewing the output) and not much else in terms of eye candy.

Of course, the editor does have some of the basic features one might expect such as syntax highlighting and indentation, and a real-time code preview function (which can also be turned off in order to allow you to execute the code manually).

Definitely has more than it leads you to think

Despite its overall simplicity, the editor does have a decent array of customization features available. For example, from the Settings section, you can change anything from the GUI theme, all the way up to the font and its size. Furthermore, you can choose whether line numbering or line wrapping is used, and also how the so-called invisible characters should be handled.

Surprisingly, you can also extend the app’s base functionality. For example, you can install NPM packages from other JavaScript projects, import node modules, as well as change the working directory.

RunJS – the perfect playground for creative little JS projects

To conclude, if you’re just looking for a simple JS code editor to try out basic ideas and just let your creativity run wild without having to deal with the complexity of typical code editors, then RunJS is just perfect. The only little niggle we found during our tests was the fact that the app sometimes struggled to change the UI themes, requiring more than one restart.

Filed under

RunJS was reviewed by Vladimir Ciobica
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RunJS 2.1.3 / 2.2.0 Pre-release

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