I tried to add a custom datepicker with custom js in my Magento 2 checkout for delivery date, the custom js datepicker is showing and when i click the date it fills the value, but when i click next to go to the payment method i got an error This is a required field.

enter image description here

the html file:

<input id="shipping_date" class="input-text" type="text" data-bind="
        event: {change: userChanges},
        hasFocus: focused,
        value: value, 
        datepicker: true,
        attr: {
            name: inputName,
            placeholder: placeholder,
            'aria-describedby': noticeId,
            disabled: disabled
        }" readonly="true"/>
<div class="clearfix">
  <div id="cal1Container">

the js file:

], function ($, ko, Component) {
    'use strict';
    return Component.extend({
        initialize: function () {
            var calendar = window.checkoutConfig.calendar;
            var storeId = window.checkout.storeId; 
            ko.bindingHandlers.datepicker = {
                init: function (element, valueAccessor, allBindingsAccessor) {
                    var $el = $(element); 

                    // custom DatePicker
                    YAHOO.shipping.calendar.init = function() {
                        var options = {
                            mindate: calendar.first_day,
                            maxdate: calendar.last_day,
                            locale_weekdays: "1char",
                        YAHOO.shipping.calendar.cal1 = new YAHOO.widget.CalendarGroup(
                          "cal1Container", options,
                        var mySelectHandler = function(type,dateSelected,obj) {
                          var dates = dateSelected[0];
                                    var date = dates[0];
                                    var year = date[0], month = date[1], day = date[2];
                                    var date = year + "-" + month + "-" + day;
                                    document.getElementById('shipping_date').value = date;  

                             YAHOO.shipping.calendar.cal1.selectEvent.subscribe(mySelectHandler, YAHOO.shipping.calendar.cal1, true);

                    // end custom DatePicker


            return this;
  • I had the same issue in which my customname(shipping_date) in the html and method was different. Check the name is shipping_date if u have a installData.php – Mr Zid Feb 28 '20 at 9:51

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