I have some objected oriented JS that works fine in firefox but not in IE 8 (though it will be IE 9 that we will need to support).

When I do: "self = this;" IE flags that as an error. I am trying to set this to self to then use it in a jquery callback to call some other
method in my JS object.

this.upd_params = function () {
   $("#add-parameter-modal").modal('hide');

   var param_form = $('#add_param_form');
   self = this;
   this.added_params = [];
   this.removed_params = [];

   $('.unused_parameter').each(function (index, obj) {
     if (obj.checked) {
       id = self.get_idnum(obj.id);
       self.add_param2list(id);
     }
   });


   $('.used_parameter').each(function (index, obj) {
     if (!obj.checked) {
       id = self.get_idnum(obj.id);
       self.remove_param(id);
     }
   });

   this.upd_html();

   cfg_form_changed = true;

};

I have some objected oriented JS that works fine in firefox but not in IE 8 (though it will be IE 9 that we will need to support).

When I do: "self = this;" IE flags that as an error. I am trying to set this to self to then use it in a jquery callback to call some other
method in my JS object.

this.upd_params = function () {
   $("#add-parameter-modal").modal('hide');

   var param_form = $('#add_param_form');
   self = this;
   this.added_params = [];
   this.removed_params = [];

   $('.unused_parameter').each(function (index, obj) {
     if (obj.checked) {
       id = self.get_idnum(obj.id);
       self.add_param2list(id);
     }
   });


   $('.used_parameter').each(function (index, obj) {
     if (!obj.checked) {
       id = self.get_idnum(obj.id);
       self.remove_param(id);
     }
   });

   this.upd_html();

   cfg_form_changed = true;

};

• javascript
• internet-explorer
• this

• @JaredFarrish Oh, missed that entirely :) – user166390 Commented Aug 17, 2012 at 21:46

2 Answers 2

Make sure self is a locally-scoped (not global) variable.

var self = this;

Otherwise, self refers to window.self and assigning to it is not allowed.

Okay, i'm posting this because i believe its related and can be useful to others, if you do inline variable assigning, as the code below:

var var1 = value1,
    var2 = value2,
    self= this;

it will throw an Exception on IE saying Not Implemented.

You can fix it by changing to something like this:

var var1 = value1,
    var2 = value2;

var self= this;