Is there any difference between this and self keyword usage in knockout js

[Tridip Bhattacharjee]

i just wonder is there any difference between self and this keyword usage or both same

see this example which use this keyword

var ViewModel = function(first, last) { this.first = ko.observable(first); this.last = ko.observable(last); this.full = ko.computed(function() { return this.first() + " " + this.last(); }, this); };

see this example which use self keyword instead of this keyword

var ViewModel = function(first, last) { var self=this; self.first = ko.observable(first); self.last = ko.observable(last); self.full = ko.computed(function() { return self.first() + " " + self.last(); }, self); };

which approach is good and why accepted ? thanks

[Brian George]

It is my understanding that "this" works just as well as "self".  However, the biggest difference is the confusion.  If you use "this" for everything, you will end up with a lot of confusion as to what "this" actually is when you are in sub-functions, and inline functions.  The "self" variable removes that confusion and is always pointing at the view model class.  I ALWAYS use a "self" variable while in knockout to avoid any confusion later on.

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[Michael Best]

If you're using self, there's no need to pass it to the computed. So you should do it like this:

self.full = ko.computed(function() { return self.first() + " " + self.last(); });