How to generate global, named javascript functions in coffeescript, for Google Apps Script

Question

I\'d like to write Javascript scripts for Google Apps Script using CoffeeScript, and I\'m having trouble generating functions in the expected form.

Google Apps Scrip

Answer 1

This should give you a global named function (yes, it's a little hacky, but far less that using backticks):

# wrap in a self invoking function to capture global context
do ->
  # use a class to create named function
  class @triggerableFunction
    # the constructor is invoked at instantiation, this should be the function body
    constructor: (arg1, arg2) ->
      # whatever

Answer 2

CoffeeScript does not allow you to create anything in the global namespace implicitly; but, you can do this by directly specifying the global namespace.

window.someFunc = (someParam) -> 
    alert(someParam)

Answer 3

Turns out this can be done using a single line of embedded Javascript for each function.

E.g. this CoffeeScript:

myNonTriggerableFunction = ->
  Logger.log("Hello World!")

`function myTriggerableFunction() { myNonTriggerableFunction(); }`

... will produce this JavaScript, when invoking the coffee compiler with the 'bare' option (the -b switch):

var myNonTriggerableFunction;

myNonTriggerableFunction = function() {
  return Logger.log("Hello World!");
};

function myTriggerableFunction() { myNonTriggerableFunction(); };

With the example above, Google Apps Script is able to trigger myTriggerableFunction directly.

Answer 4

juste use @ in script, exemple of my code :

@isArray = (o)->
  Array.isArray(o)

it will be compiled in :

(function() {

  this.isArray = function(o) {
    return Array.isArray(o);
  };

}).call(this);

this = window in this case, so it's global function