Function becomes undefined when declaring local variable with same name

Question

I have declared a function in file so that it becomes global:

Answer 1

Like others have said, your issue is hoisting. Just return an object literal and use the IIFE pattern.

var myService = (function speakService() {
    var speak = function(word) {
        console.log(word);
    };
  
    return {
      speak: speak
    };
})();

myService.speak("TEST");