function ViewModel() {
var self = this;
self.firstName = ko.observable("");
self.lastName = ko.observable("");
self.fullName = ko.observable("");
self.fullNamePure = ko.observable("");
self.tempFullName = ko.computed(function () {
var value = self.firstName() + " " + self.lastName();
self.fullName(value);
return value;
});
self.tempFullNamePure = ko.pureComputed(function () {
var value = self.firstName() + " " + self.lastName();
self.fullNamePure(value);
return value;
});
};
ko.applyBindings(new ViewModel());
<input type="text" data-bind="textInput: firstName" />
<input type="text" data-bind="textInput: lastName" />
<hr />
ko.computed : <span data-bind="text: fullName"></span>
<br />
ko.pureComputed : <span data-bind="text: fullNamePure"></span>