Call a function whose name is stored in a variable [duplicate]

Answer 1

Replace:

var init = function () {
    var str = 'fctToCall';
    Module.str(); // here
};

With:

var init = function () {
    var str = 'fctToCall';
    Module[str](); // here
};

Here, str is used as key to access the fctToCall function on Module.

Then you can call Module2.init(), in your IIFE:

(function() {
  var Module = (function() {
    var fctToCall = function() {
      document.write('Foo'); // (alert is broken in snippets)
    };
    return {
      fctToCall: fctToCall
    };
  })();
  var Module2 = (function() {
    var init = function() {
      var str = 'fctToCall';
      Module[str](); // Access & call `fctToCall`.
    };
    return {
      init: init
    };
  })();
  Module2.init(); // Call `init`.
})();