You need to "bind" the actual callback function (since it will be
executed in a global context otherwise):
...
onSuccess: function(data) {
// do some processing...
this.callback(); // <= "bind" ensured that "this" refers to your
instance
}.bind(this)
...
- kangax
On Mar 23, 7:20 pm, dj <[EMAIL PROTECTED]> wrote:
> Ahhh thank you for your answer. It really saved me.
> Where can I read some detailed documentation regarding "this" keyword
> and how to use it correctly with prototypejs?
>
> I have one more question regarding this (I'll keep the same example):
>
> var SuperClass = Class.create();
> SuperClass.prototype = {
> test : "Test data is ",
> initialize : function(){
> this.doRequest();
> },
> doRequest : function() {
> new Ajax.Request('somedata.php', {
> method: 'get',
> onSuccess :
> this.callback.bind(this) <<== **here**
> } );
> },
> callback : function(data) {
> alert(this.test+":"+data);
> }
>
> };
>
> if I want to have instead of this.callback.bind(this) implemented
> function which calls callback (only when needed) for example:
>
> var SuperClass = Class.create();
> SuperClass.prototype = {
> test : "Test data is ",
> initialize : function(){
> this.doRequest();
> },
> doRequest : function() {
> new Ajax.Request('somedata.php', {
> method: 'get',
> onSuccess :
> function(data) { do some processing; . . . **
> this.callback.bind(this); how to call callback from here ** }
> } );
> },
> callback : function(data) {
> alert(this.test+":"+data);
> }
>
> };
>
> Thank you.
> D.
>
> On Mar 23, 12:43 am, jdalton <[EMAIL PROTECTED]> wrote:
>
> > You need to bind this.callback();
> > because its loosing the proper scope of
> > "this".http://www.prototypejs.org/api/function/bind
>
> > this.callback.bind(this)
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