$(this) doesn't work in a function

Question

The following code loads html content from a file (i used this thread)

<script>
$.fn.loadWithoutCache = function (){
 $.ajax({
     url: arguments[0],
     cache: false,
     dataType: "html",
    success: function(data) {
        $(this).html(data);        // This is not working
      //$('#result').html(data);   //THIS WORKS!!!
        alert(data);           // This alerts the contents of page.html
    }
 });
}


$('#result').loadWithoutCache('page.html');

</script>

Please let me know what the problem is? I hope it's something stupid :)

Edit: CORRECT CODE

<script>
$(document).ready(function() {

$.fn.loadWithoutCache = function (){
 var $el = $(this);
 $.ajax({
     url: arguments[0],
     cache: false,
     dataType: "html",
     context: this,
     success: function(data) {
     $el.html(data);
    }
 });
}

$('#result').loadWithoutCache('page.html');

});
</scipt>

Thanks Jon and everyone!

Answer 1

The problem is that inside the success callback, this does not have the value you expect it to.

However, you do have access to this (with the expected value) inside loadWithoutCache itself. So you can achieve your goal by saving $(this) into a local variable and accessing it from inside the success handler (creating a closure).

This is what you need to do:

$.fn.loadWithoutCache = function (){
 var $el = $(this);
 $.ajax({
     url: arguments[0],
     cache: false,
     dataType: "html",
     success: function(data) {
        $el.html(data);
        alert(data);
    }
 });
}

Answer 2

The callback (success) function runs when the response arrives, and it doesn't run in the scope of the loadWithoutCache method, as that has already ended.

You can use the context property in the ajax call to set the context of the callback functions:

$.fn.loadWithoutCache = function (){
  $.ajax({
    url: arguments[0],
    cache: false,
    dataType: "html",
    context: this,
    success: function(data) {
      $(this).html(data);
    }
  });
}