Using Knockout.js how do bind a Date property to a HTML5 date picker?

Question

(this only works in Chrome at the moment as most browsers don\'t yet implement date picker for input type=\"date\")

In the following example MyDate starts o

Answer 1

Based off of Ryan's answer above, this works a little nicer with newer ko/chrome widgets. It also strips the time part of the date.

ko.bindingHandlers.datePicker = {
    init: function (element, valueAccessor, allBindingsAccessor, viewModel) {
        // Register change callbacks to update the model
        // if the control changes.
        ko.utils.registerEventHandler(element, "change", function () {
            var value = valueAccessor();
            var target_date = element.valueAsDate;
            var truncated = new Date(target_date.getFullYear(), target_date.getMonth(), target_date.getDate());
            value(truncated);
        });
    },
    // Update the control whenever the view model changes
    update: function (element, valueAccessor, allBindingsAccessor, viewModel) {
        var value =  valueAccessor();
        var unwrapped = ko.utils.unwrapObservable(value());
        if(unwrapped === undefined || unwrapped === null) {
            element.value = '';
        } else {
            element.valueAsDate = unwrapped;
        }
    }
};