Knockout.js - javascript function on data-bind

Question

Is there a way i can call JavaScript function on data-bind like this:

Answer 1

Well I am just going through the tutorial myself but I thought you had to set up a property and use ko.computed to give it its value (from the tutorial):

function AppViewModel() {
this.firstName = ko.observable("Bert");
this.lastName = ko.observable("Bertington");
this.fullName = ko.computed(function(){ 
  return this.firstName() + " " + this.lastName(); 
  },this);
}

Then you can have:

Full name: