CODEWITHSUNDEEP
javascriptknockout.js
Emil Dimitrov
Emil Dimitrov

Reputation: 109

Reusing Knockout.js ViewModels

Hi there i'm building multipage application with Knockout.js and i'm facing a problem writing too much duplicated code..

As example in one of my views i have:

var personVm = function {

   //properties here

}

personVm.prototype {

  //extensions & methods here

}

And at some point i have to use the same ViewModel in some other view.. So i end up duplicating code..

I searched for solutions and require.js is the most common.. But in my case require.js is not suitable and i can't use it. So i will be glad if some one shares some ways to deal with this problem.

Update:

To clear more my question i need some kind of container from which i can grab instances of given ViewModel for my differen views ( which i get from asp.net )

Upvotes: 1

Views: 293

Answers (2)

maggiekh
maggiekh

Reputation: 204

Why can't you just keep personVm in a file which you can access from all over and make a new one each time?

thisModel.person = new personVm(data);

otherModel.person = new personVm(data);

Or am I not understanding the problem correctly?

Upvotes: 0

Alex
Alex

Reputation: 38529

You could use knockouts own ko.utils.extend

var personVm = function {
   //properties here
}

personVm.prototype {
  //extensions & methods here
}

then, later

var superHeroVm = function() { 
    var self = this;

    self.specialPower = ko.observable();

    ko.utils.extend(self, new personVm());
}

Upvotes: 1

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