knockout.js - How to bind Bootstrap datepicker with Knockout within Durandal framework -

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i wanted avoid lumping onto existing question.

so i'm trying use jsfiddle within durandal framework have main.js configured require bindings (please notice observable: true): 

define(['durandal/system', 'durandal/app', 'durandal/viewlocator', 'modules/logger', 'modules/bindings', 'modules/hubservice'], function (system, app, viewlocator, logger, bindings, hubservice) {  app.configureplugins({     router: true,     dialog: true,     widget: true,     observable: true });

i've set bindings.js composite binding handler so:

 composition.addbindinghandler('datepicker', {     init: function (element, valueaccessor, allbindingsaccessor, viewmodel) {         var unwrap = ko.utils.unwrapobservable;         var datasource = valueaccessor();         var binding = allbindingsaccessor();         var options = {             keyboardnavigation: true,             todayhighlight: true,             autoclose: true,                            format: 'mm/dd/yyyy'         };         if (binding.datepickeroptions) {             options = $.extend(options, binding.datepickeroptions);         }         $(element).datepicker(options);         $(element).datepicker('update', datasource);         $(element).on("changedate", function (ev) {             var observable = valueaccessor();             if ($(element).is(':focus')) {                 // don't update while user in field...                 // instead, handle focus loss                 $(element).one('blur', function (ev) {                     var dateval = $(element).datepicker("getdate");                     observable(dateval);                  });             }             else {                 observable(ev.date);              }         });         //handle removing element dom         ko.utils.domnodedisposal.adddisposecallback(element, function () {             $(element).datepicker('remove');         });     },     update: function (element, valueaccessor) {         var value = ko.utils.unwrapobservable(valueaccessor());         $(element).datepicker('update', value);     } });

while works in jsfiddle, throws error when using code in durandal framework.

the view comes , can use datepicker throws error on following line:

 observable(dateval);

anyone have clue how work durandal's usage of observables?


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