Why does Bootstrap 4 datepicker API not work?

Question

I’m creating a calendar, somewhere in the view, I needed an input for the user to enter a date. Since I’m wearing bootstrap 4 and bootstrap has several Addons for datepickers, I used one of them. On the front end, nothing to say, it works great. When in the back-end, when I use API methods, options or events in jquery, they do not execute.

console.log($date = "data");
$('.datepicker').datepicker({
		format: 'dd/mm/yyyy'
}).on('changeDate', function(e) {
$date = $('.datepicker').datepicker('getDate');
		console.log($date);
});

<!-- Bootstrap CND -->
	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
  <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
	<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
	<!-- Datapicker css -->
	<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.8.0/css/bootstrap-datepicker.css">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.8.0/js/bootstrap-datepicker.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.8.0/locales/bootstrap-datepicker.pt.min.js"></script>
  <link href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet">

<div class="container-fluid">
  <div class="row">
    <div class="col-md-3">
	    <div class="input-group date" data-provide="datepicker" id="sandbox-container" style="flex: 0 0 auto;">
			<input type="text" class="form-control" class="datepicker" data-date-format="dd/mm/yyyy" data-date-autoclose="true" data-date-today-highlight="true">
			<div class="input-group-addon" style="justify-content: center;align-items: center;flex: 0 0 25px;">
				<i class="fa fa-calendar" aria-hidden="true" style="align-self: stretch"></i>
			</div>
		</div>
	  </div>
  </div>
</div>

[documentation] - I’ve been guided by the documentation, I may be using it incorrectly, you can identify the error? documentation

Can someone help me? Regards

[update] 2/03/2019 - Options already execute

According to the documentation: Data API As with bootstrap’s Own plugins, datepicker provides a data-api that can be used to instantiate datepickers without the need for custom javascript. For Most datepickers, Simply set data-provide="datepicker" on the element you want to initialize, and it will be intialized lazily, in true bootstrap fashion. For inline datepickers, use data-provide="datepicker-inline" ; These will be immediately initialized on page load, and cannot be lazily Loaded.

I changed the attribute data-provide="datepicker" for data-provide="datepicker-inline", with this part of jquery has already performed, however events are not yet dispachados.

$('.datepicker').datepicker({
            format: 'dd/mm/yyyy'
    })

Answer 1

Hello I made some tests and the problem is in using INPUT you must use DIV in datetimer, I think there is a better library than the bootstrap you are using, try it’s here from jQuery.UI.

But anyway so it worked just try to adapt to the look you want.

$('#datepicker').datepicker();
$('#datepicker').on('changeDate', function(e){
    $date = $('#datepicker').datepicker('getDate');
		console.log($date);
});

<!-- Bootstrap CND -->
	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
  <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
	<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
	<!-- Datapicker css -->
	<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.8.0/css/bootstrap-datepicker.css">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.8.0/js/bootstrap-datepicker.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.8.0/locales/bootstrap-datepicker.pt.min.js"></script>
  <link href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet">

<div class="container-fluid">
  <div class="row">
    <div class="col-md-3">
	    <div class="input-group date" data-provide="datepicker" id="sandbox-container" style="flex: 0 0 auto;">
			<div id="datepicker" data-date-format="dd/mm/yyyy" data-date-autoclose="true" data-date-today-highlight="true"></div>
			<div class="input-group-addon" style="justify-content: center;align-items: center;flex: 0 0 25px;">
				<i class="fa fa-calendar" aria-hidden="true" style="align-self: stretch"></i>
			</div>
		</div>
	  </div>
  </div>
</div>

Answer 2

[Quasi-resolved]

DATA API Like the bootstrap plug-ins themselves, datepicker provides a data API that can be used to instantiate datepickers without the need for custom javascript. For most datepickers, simply set data-provide = "datepicker" on the element you want to initialize, and it will be idlely initialized in the form of true bootstrap.

[Unresolved] - In these cases I still don’t know which jquery code waits for the datepicker initialization. I tried to

$('.datepicker').ready(function() {
            $('.datepicker').datepicker();
            $('#sandbox-container input').datepicker({
            format: "dd/mm/yyyy"
            }).on('changeDate', function(e) {
            $date = $('.datepicker').datepicker('getDate');
            console.log($date);
            });
        });

[debbuging] - enters the function given in ready, but does not execute options or events.

[Busy] - For in-line, use data-provide = "datepicker-inline"; these will be initialized immediately on page loading and cannot be loaded with sloth.

Thus changing the HTML

<div class="input-group date" data-provide="datepicker-inline" id="sandbox-container" style="flex: 0 0 auto;">

$(document).ready(function() {
        $('#sandbox-container input').datepicker({
        format: "dd/mm/yyyy"
        }).on('changeDate', function(e) {
        console.log('Aqui');
        $date = $('.datepicker').datepicker('getDate');
        console.log($date);
        });
    });