JS++ brings the first sound optional type system for "million-line scale" application complexities.
With near-instant compile times, it will feel like you're still writing dynamic code.
Version 0.10.0 - December 10, 2021 - BSD License
It's the same JavaScript you already know with optional features. Use only what you need.
Compile 10,000 lines of code - with correct analysis and checking - faster than you can compile "Hello World" in TypeScript.
Import JavaScript code and libraries with just one line of code - JS++ 'external' is safer and faster than the competition.
JS++ was granted U.S. Patent #10,296,313 for the first sound, provably correct gradual type system. Find bugs before they occur, and bring your type errors down to zero.
JS++ is designed by developers with 25+ years of experience, with breadth & depth ranging from C/C++/assembly systems programming to web and compilers.
Fast 8-, 16-, 32-, and 64-bit integer types. Function overloading. Standard Library. Dead code elimination. Everything you need to build complex projects.
JS++® introduces the first and only type system compatible with JavaScript that is optional and "sound."
In other words, if you choose to declare the type for a variable, it is guaranteed to always be correct — during compile-time checking and runtime execution — even if you're using "untyped" JavaScript libraries.
// You're not required to declare the type for a variable and you can just
// keep writing regular JavaScript (again, NO learning curve):
var offset = 0;
// But, if you do, this next variable will always remain an 'unsigned int' - even at runtime.
// You'll never see NaN ("Not a Number") runtime errors again.
// This variable is 'unsigned' so it's also guaranteed to never be negative.
unsigned int pageHeight = $(document).height();
"TypeScript's 'type erasure' vs JS++'s 'type guarantee' would be a big reason to use JS++ over TypeScript."
Due to the low quality and low reliability of programming languages that compile to JavaScript - even from Microsoft, Google, and Facebook - programmers have begun to think these languages are "hacks." JS++ was researched and designed over multiple years with a strong scientific foundation.
You'll be surprised how JS++ works 100% of the time, even in the most obscure edge cases that professional JavaScript developers have never even heard of, from ActiveX and GC bugs to cross-browser DOM API differences and 'instanceof' across iframes. The programming experience of the JS++ team dates back to the birth of the World Wide Web.
@RogerPoon I love your language. I wish I had a wife like JS++!
— Felix Lebel (@felixvynatu) April 22, 2020
Javascript++ is so much better than Typescript/Rollup/Babel: https://t.co/P9tDHEmYwA Instant compile times + function/method overloading.
— diego (@un_i_) September 28, 2017
@RogerPoon Man, JS++ is more quick-to-use than TypeScript with tsc.
— Hydroper (@HydroperHy) June 8, 2018
"The first thing that grabbed my attention... was the syntax of JS++. Familiar, simple, readable. Is this really Javascript?"
— Abel Varga Scratching the Surface of JS++
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