title: Is it a closure?
body: <p>Hello i started with closures few days ago and i would like to know if i am on the right path. I ve read a lots of stuff also here but i feel that i need my own example . so this is my example :</p>
  
  <pre><code>var test = {
   app: function() {
   var a = "asdasd0";
   function f() {
    document.write(a);
   }
   test.change();
   return f();
  },
  change: function() {
   $("body").css({
    "color": "red"
   });
   }
  }
  test.app();
  </code></pre>
  
  <p>Am i right when i am thinking that the function f(){...}; inside test.app is a closure and test.change() also in test.app is a closure? is there anything else ?</p>
  
  <p>Also why test.change() works differently in a codepen(text is red) and jsfiddle(text is not red)? Is it a bad code and jsfiddle has a problem with it ?</p>