Define global function within anonymous self-executing function?

Question

(function(){

  var someValue = 5;

  function myFunction(input) = {
    return someValue * input;
  };

})();

I have a self-executing function, that contains many things, among them at function that I would like to make global. I would typically just declare it in the global scope, but it needs to be able to reference variables that are local only to the self-executing function.

What is the best approach to making the function globally-accessible without getting rid of the self-executing function altogether (thus littering the global space with variables)?

ntalbs · Accepted Answer · 2014-09-25 05:02:21Z

3

You can add the function to the global window object.

(function(){

  var someValue = 5;

  window.myFunction = function (input) {
    return someValue * input;
  };

})();

After the immediate function executed, you can call myFunction().

answered Sep 25, 2014 at 5:02

ntalbs

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Tony Broyez · Accepted Answer · 2015-05-02 11:59:11Z

2

Alternatively, you could do something like this, which has essentially the same result that ntalbs proposed.

 var myFunction;
 (function(){
     var someValue = 5;
     myFunction = function (input) {
         return someValue * input;
     };
 })();

console.log( myFunction( 4 ), window.myFunction ); // output: 20, function(input){return someValue * input}

answered May 2, 2015 at 11:59

Tony Broyez

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