javascript - Knockout observable subscribe doesn't recognize a change with date input in google Chrome -

weird issue knockout.js whereas won't recognize date has been selected after reset, same date.

to replicate in jsfiddle: http://jsfiddle.net/v5jcq/ follow these steps:

1. pick date
2. cllick reset
3. pick same date you've picked in step 1

how? what? why?

code:

<input type="button" data-bind="click: resetdate" value="reset"> <input data-bind="value : estimateddeliverydate" type="date"> <span data-bind="html: selecteddate" />  var viewmodel = {     estimateddeliverydate: ko.observable(),     selecteddate: ko.observable() };  viewmodel.estimateddeliverydate.subscribe(function (date) {     viewmodel.selecteddate("date selected: " + date); });  viewmodel.resetdate = function () {     viewmodel.estimateddeliverydate(""); };  ko.applybindings(viewmodel); 

n.b.: issue applicable google chrome v20+ comes built-in date picker html5 date input control. hence tags.

not sure why, not seem firing change event in scenario. easy fix specify want listen input event using valueupdate additional binding like:

<input data-bind="value : estimateddeliverydate, valueupdate: 'input'" id="estimateddeliverydate" name="estimateddeliverydate" type="date"><span data-bind="html: selecteddate" /> 

http://jsfiddle.net/rniemeyer/geggj/