Knockout.js - javascript function on data-bind

Question

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

Answer 1

You can use arbitrary JavaScript expressions for bindings, but keep in mind that they are evaluated in the viewmodel's context, so all functions in the expression have to be properties of viewmodel. In your case, MySomeFunction has to be a property of your viewmodel. If you create your viewmodel using mapping plugin, you can attach additional functions to the viewmodel like this:

var viewModel = ko.mapping.fromJS(data.d)
viewModel.MySomeFunction = function(...){...};