I am trying to use computed properties in another computed properties and when i run code i am getting following error in console.
Cannot write a value to a ko.computed unless you specify a 'write' option
function AppViewModel() {
var self = this;
self.firstName = ko.observable('rahul');
self.lastName = ko.observable('sharma');
self.fullName = ko.computed(function() {
return self.firstName() +' ' + self.lastName();
});
self.upperFullName = ko.computed(function() {
return self.fullName.toUpperCase();
});
}
// Activates knockout.js
ko.applyBindings(new AppViewModel());
and here is html code and js fiddle link
<p><input data-bind="value: firstName"></p>
<p><input data-bind="value: lastName"></p>
<p><input data-bind="value: fullName"></p>
<p> <span data-bind="text: upperFullName"> </span> </p>
self.fullName is a function, returning the computed value.
self.upperFullName = ko.computed(function() {
return self.fullName().toUpperCase();
});
notice the parenthesis!
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