NebulaFox's Code

I am a bleeding edge developer and that is why I work at Valis, but I digress. I have been playing with Node.js lately, mostly because my colleagues are fascinated by it and that I went to a Node.js workshop by Jack Franklin. Naturally, I wanted the latest JavaScript features to make my life easier. Problem is they are only available in Mozilla javascipt engines and Node.js uses V8. I remembered from the workshop that Node.js can allow for some new ECMAScript 6 extensions and so t is a case of doing this

node --harmony file.js

Which should mean I could write code like this

// MDN example var a = 5; var b = 10; if (a === 5) { let a = 4; // The scope is inside the if-block var b = 1; // The scope is inside the function console.log(a); // 4 console.log(b); // 1 } console.log(a); // 5 console.log(b); // 1

And I would be wrong

file.js:7 if (a === 5) { ^ SyntaxError: Illegal let declaration outside extended mode at Module._compile (module.js:439:25) at Object.Module._extensions..js (module.js:474:10) at Module.load (module.js:356:32) at Function.Module._load (module.js:312:12) at Function.Module.runMain (module.js:497:10) at startup (node.js:119:16) at node.js:901:3