How to compile string of coffeescript code in javascript?

Question

So let's say I have a string of coffeescript code, in a javascript file on nodejs. How could I convert this string into javascript, without using the terminal? I have tried coffeescript-compiler, but it gave me an error about a closed socket. I have coffeescript installed globally and coffee-script compiler installed locally.

Edit: Here is the code:

var Compiler = require('coffeescript-compiler');
var cc = new Compiler();

cc.compile('a = 5', function (status, output) {
    if (status === 0) {
        // JavaScript available as a string in the `output` variable
    }
});

And here is the error it throws:

events.js:72
    throw er; //unhandled 'error' event

Error: This socket is closed.
    at Socket._write (net.js:637:19)
    at doWrite (_stream_writable.js:225:10)
    at writeOrBuffer (_stream_writable.js:215:5)
    at Socket.Writable.write (_stream_writable.js:182:11)
    at Socket.write (net.js:615:40)
    at doCompile (D:\TSA\App\node_modules\coffeescript-compiler\Compiler.js:33:15)
    at Compiler.compile (D:\TSA\App\node_modules\coffeescript-compiler\Compiler.js:46:3)
    at Object.<anonymous> (D:\TSA\App\coffeescript.js:4:4)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)

Can you show the code you use for coffeescript-compiler? It is definitely the thing to use. — loganfsmyth
– loganfsmyth, Commented Nov 9, 2014 at 1:42

Ian Greenleaf Young · Accepted Answer · 2015-05-14 19:46:53Z

2

The CoffeeScript package itself provides a compiler function, so for a simple use case like yours it's even easier than using coffee-compiler. You can get what you want with something like this:

var CoffeeScript = require('coffee-script');
var compiledJS = CoffeeScript.compile('a = 5');

answered May 14, 2015 at 19:46

Ian Greenleaf Young

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Comments

david.tanner · Accepted Answer · 2016-02-11 23:18:59Z

0

The CoffeeScript compiler will return you a regular javascript string, but then you need to run that through something else to require it.

// First the coffee-script string needs to be converted to valid javascript
function requireCoffeeScript(src, filename) {
  var script = require("coffee-script").compile(src, {filename});
  return requireJSFromString(script, filename);
}

// Now the valid javascript string can be 'required' and the exports returned
function requireJSFromString(src, filename) {
  var m = new module.constructor();
  m.paths = module.paths;
  m._compile(src, filename);
  return m.exports;
}

answered Feb 11, 2016 at 23:18

david.tanner

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Nikolay Melnikov · Accepted Answer · 2014-11-09 00:21:10Z

-1

You could use this online converter.

Or, the CoffeeScript(http://coffeescript.org/) homepage has a tab: "Try CoffeeScript", where you could paste your CoffeeScript code and see its equivalent in JavaScript.

answered Nov 9, 2014 at 0:21

Nikolay Melnikov

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1 Comment

Anthony Dellinger Over a year ago

No, I mean something like a function I can call to compile coffeescript, like: var code = compile('a="foo"'), where code would equal 'var a = "foo"'.

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