JS++ explained

Paradigm:	Imperative, structured, object-oriented, functional, generic
Designer:	Roger Poon, Anton Rapetov
Developer:	Onux
Typing:	Gradual, static, dynamic
Influenced By:	C, C++, C#, Java, JavaScript
License:	BSD License
File Ext:	.jspp, .js++, .jpp
File Formats:	-->

JS++ is a proprietary programming language for web development that extends JavaScript with a sound type system. It includes imperative, object-oriented, functional, and generic programming features.

History

JS++ first appeared on October 8, 2011.^{[1] [2] [3]} The modern implementation was announced at DeveloperWeek 2016^[4] and released on May 31, 2016.^{[5] [6] [7] [8]} The language is designed by Roger Poon and Anton Rapetov.

Syntax

Type annotations

Since JS++ is a superset of JavaScript, declaring types for variables is optional.

int x = 1; // declares the variable x with an "internal type" (JS++ type)var y = 2; // declares the variable y with an "external type" (JavaScript type)bool z = true; // declares the variable z with an "internal type" (JS++ type)

Features

JS++ features a type system that is sound.^{[9] [10]}

JS++ is able to efficiently analyze out-of-bounds errors at compile time.^{[11] [12] [13]}

Development tools

Compiler

The JS++ compiler is available for Windows, Mac OS X, and Linux. The compiler generates JavaScript output.

Editor integration

JS++ integrates with various code editors including Visual Studio Code, Atom, and Sublime Text.^{[14] [15] [16]}

Build tools

JS++ can be integrated with third-party build tools like Webpack.^[17]

Release history

Version number	Release date	Changes
0.01		Alpha version, initial release
0.011		Alpha version
0.012		Alpha version
0.013		Alpha version
0.014.1		Alpha version
0.4.1		Beta version, array and callback types, character literals, integral suffixes, removed ECMAScript ASI
0.4.2		Modules, function overloading, dead code elimination, editor integrations
0.4.2.1		Bug fixes
0.4.2.2		Source map debugging
0.4.2.4		Support for Mac OS X, C-style casts, callback and array conversions
0.5.0		Classes
0.5.1		'foreach' loops
0.5.2		BSD License, Interfaces, Abstract Classes, Virtual Methods, Auto-boxing
0.7.0		All ECMAScript 3 features via Array and Standard Library
0.8.0		Generic programming, Dictionary, multi-line strings, .js++ file extension
0.8.1		auto, catch-all clauses, standard library modules for handling time, bug fixes
0.8.4		New string functions, advanced generics, bug fixes, standard library expansion
0.8.5		Bug fixes
0.8.10		Faster compile times, stacks, queues, Unicode, Base64, generic default constraint rules
0.9.0		Efficient compile time out-of-bounds error analysis
0.9.1		Bug fixes
0.9.2		Final (immutable) variables and default to 64-bit for macOS Catalina

See also

• TypeScript
• PureScript

Notes and References

1. Web site: JavaScript++: New, Powerful Language for Better Web Development. https://web.archive.org/web/20111017221312/http://jspp.javascript.am/. dead. 17 October 2011. 17 October 2011.
2. Web site: C++ et Javascript = Javascript++. https://web.archive.org/web/20111012143226/http://www.lafermeduweb.net/veille/c-et-javascript-javascript-123284133702156289.html. dead. 12 October 2011. 12 October 2011.
3. Web site: Index of /downloads. https://web.archive.org/web/20111018172906/http://jspp.javascript.am/downloads/. dead. 18 October 2011. 18 October 2011.
4. Web site: Javascript Conference - DeveloperWeek 2016 - February 12-18. https://web.archive.org/web/20160213204925/http://www.developerweek.com/javascript-conference/. dead. 13 February 2016. 13 February 2016.
5. Web site: JS++ Goes Into Public Beta. May 31, 2016.
6. Web site: Onux seeks to fix JavaScript's lack of type safety. SD Times. June 1, 2016. Alex Handy.
7. Web site: New compiler tackles JavaScript's weak typing. InfoWorld. June 6, 2016. Paul Krill.
8. Web site: jQuery 3.0 Released and Other JavaScript News. Softpedia. June 9, 2016. Catalin Cimpanu.
9. Web site: The JS++ Type System. www.onux.com.
10. Web site: Onux JS++, an answer to JavaScript 'brittle' type safety?. Computer Weekly. June 13, 2016. Adrian Bridgwater.
11. Web site: JS++, the JavaScript superset, is getting rid of out-of-bounds errors. Akuaroworld. January 23, 2019. Fabio Díaz.
12. Web site: JS++ programming language looks to solve out-of-bounds errors. SD Times. January 16, 2019. Christina Cardoza.
13. Web site: JS++ 0.9.0: Efficient Compile Time Analysis of Out-of-Bounds Errors. January 11, 2019.
14. Web site: JavaScript superset JS++ adds dead code elimination and more. Computerworld. October 19, 2016.
15. Web site: JS++ 0.4.2 released with code editor integrations, modules and dead code elimination. SD Times. October 19, 2016. Christina Cardoza.
16. Web site: JS++ 0.4.2 Release - Upgraded With Modular Design, Dead Code Elimination, and Multiple Code Editors. Zeomag. October 20, 2016. Geneva Clark.
17. Web site: GitHub - IngwiePhoenix/jspp-webpack-poc. 7 December 2018. GitHub.