Yep, it seems it was added on Firefox 22: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/arrow_functions https://developer.mozilla.org/en-US/

Yep, it seems it was added on Firefox 22: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/arrow_functions https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe.... It also seems it's the proposal for ES6: http://wiki.ecmascript.org/doku.php?id=harmony:arrow_function_syntax http://wiki.ecmascript.org/doku.php?id=harmony:arrow_functio.... This blog post explains the differences between these functions and current functions: http://javascriptweblog.wordpress.com/2012/04/09/javascript-fat-city/; http://javascriptweblog.wordpress.com/2012/04/09/javascript-... i wish the unbound "->" alternative is included, so that functions used as methods can also use the new syntax.