Пример работы компилятора CS -> JS

example1.coffee

options = {} unless options?

options.type = type if type?

example1.js

if (typeof options === "undefined" || options === null) {
  var options = {};
}

if (typeof type !== "undefined" && type !== null) {
  options.type = type;
}

example2.coffee

options = {url}

options =
  url: 'link'
  text: 'description'
  show: false

example2.js

var options = {
  url: url
};

var options = {
  url: 'link',
  text: 'description',
  show: false
};

example3.coffee

do ->
  parse = (body) -> JSON.parse body

  request = (url, fn = ->) ->
    xhr {url}, (error, request, body) -> fn.call @, parse body

example3.js

(function() {
  var parse, request;

  parse = function(body) {
    return JSON.parse(body);
  };

  request = function(url, fn) {
    if (fn == null) {
      fn = function() {};
    }

    xhr({url: url}, function(error, request, body) {
      fn.call(this, parse(body));
    });
  };
})();

example4.coffee

do (tumblr) ->
  @debug = (text) -> console.log text

  @periodical = (message) ->
    setTimeout (=> @debug message), 1000

example4.js

(function(tumblr) {
  this.debug = function(text) {
    return console.log(text);
  };

  this.periodical = function(message) {
    var _this = this;

    setTimeout(function() {
      _this.debug(message);
    }, 1000);
  };
})(tumblr);

example5.coffee

do (tumblr) ->
  @posts = (options, fn) ->
    [fn, options] = [options, null] if typeof options is 'function'

    request options, fn

  alias = (self, type) ->
    self[type] = (options, fn) -> @posts options, fn

  alias tumblr, type for type in ['text', 'quote', 'link', 'answer', 'video', 'audio', 'photo']

example5.js

(function(tumblr) {
  var alias, type, _i, _len, _ref;

  this.posts = function(options, fn) {
    var _ref;

    if (typeof options === 'function') {
      _ref = [options, null], fn = _ref[0], options = _ref[1];
    }

    request(options, fn);
  };

  alias = function(self, type) {
    self[type] = function(options, fn) {
      this.posts(options, fn);
    };
  };

  _ref = ['text', 'quote', 'link', 'answer', 'video', 'audio', 'photo'];
  for (_i = 0, _len = _ref.length; _i < _len; _i++) {
    type = _ref[_i];
    alias(tumblr, type);
  }
})(tumblr);