Why My Min and Max date setting not working in my date picker?

Question

I previously asked question to set one date picker dates with respect to month/year change of another date picker. I didn't get exact answer, but somehow I managed to get min and max dates to set to a date picker by referring various stack overflow answers. But that min and max date settings are not working properly.

Month and year picking date picker:

 <label> Month</label>
 <div class="input-group date">
    <input type="text" class="form-control pull-right" id="txtMonth" onchange="MonthDatePick();">
    <div class="input-group-addon">
        <i class="fa fa-calendar"></i>
    </div>
</div>

My selected month date picking datepicker:

<div class="col-lg-3">
    <label> From</label>
    <div class="input-group date">
        <input type="text" class="form-control pull-right" id="txtFrom">
        <div class="input-group-addon">
            <i class="fa fa-calendar"></i>
        </div>
    </div>
</div>

Script:

function MonthDatePick() {
  var month = $('#txtMonth').datepicker('getDate').getMonth() + 1;//('getMonth');            
var year = $('#txtMonth').datepicker('getDate').getFullYear();//('getFullYear');   
var minDate = new Date(year, month-1, 1);
 var maxDate = new Date(year,month, 0);
$("#txtFrom").datepicker({
    autoclose: true,
    minDate: minDate,
    maxDate: maxDate,
    format: 'dd/mm/yyyy',
    //defaultDate:minDate,
    changeMonth: false,
    changeYear: false,
});
}

I debugged and found out that when I select month, min and max dates were defined. For Ex: If I choose, Feb 2018 means,

min date comes as :01/02/2018

max date comes as : 28/02/2018,

but the change does not replicate in my date selecting date picker

Debugging image picture

Debugging image picture showing min date

Here is my fiddle

How to fix this?

Answer 1

Please try this code

HTML Code :

<label> Month</label>
<div class="input-group date">
<input type="text" class="form-control pull-right" id="txtMonth" onchange="MonthDatePick();">
<div class="input-group-addon">
    <i class="fa fa-calendar"></i>
</div>
</div>

<div class="col-lg-3">
<label> From</label>
<div class="input-group date">
    <input type="text" class="form-control pull-right" id="txtFrom">
    <div class="input-group-addon">
        <i class="fa fa-calendar"></i>
    </div>
</div>
</div>

JS Code :

<script type="text/javascript">
   $("#txtMonth").datepicker({
   autoclose: true,
   startView: "months", 
   minViewMode: "months",
   format: 'M-yyyy',
   //defaultDate:minDate,
   changeMonth: false,
   changeYear: false,
});

function MonthDatePick() {
   var month = $('#txtMonth').datepicker('getDate').getMonth() + 1;//('getMonth');            
   var year = 
   $('#txtMonth').datepicker('getDate').getFullYear();//('getFullYear');   
   var minDate = new Date(year, month-1, 1);
   minDate = minDate.toLocaleDateString('en-GB');
   var maxDate = new Date(year,month, 0);
   maxDate = maxDate.toLocaleDateString('en-GB');
   $("#txtFrom").datepicker('destroy').datepicker({
      autoclose: true,
      startDate: minDate,
      endDate: maxDate,
      format: 'dd/mm/yyyy',
      //defaultDate:minDate,
      changeMonth: false,
      changeYear: false,
   });
  $('#txtFrom').datepicker('setDate',minDate);
}
</script>

Output of the code :

Answer 2

You're currently attempting to recreate an existing datepicker. Instead, modify the current instance using the setStartDate and setEndDate methods.

$("#txtClaimFrom").datepicker("setStartDate", minDate);
$("#txtClaimFrom").datepicker("setEndDate", maxDate);

$(document).ready(function() {
  $('#txtClaimMonth').datepicker({
    autoclose: true,
    format: "MM yyyy",
    viewMode: "months",
    minViewMode: "months",
  });
  $('#txtClaimFrom').datepicker({
    autoclose: true,
    format: 'dd/mm/yyyy'
  })
});

function MonthDatePick() {
  var month = $('#txtClaimMonth').datepicker('getDate').getMonth() + 1; //('getMonth');            
  var year = $('#txtClaimMonth').datepicker('getDate').getFullYear(); //('getFullYear');   
  var minDate = new Date(year, month - 1, 1);
  var maxDate = new Date(year, month, 0);
  $("#txtClaimFrom").datepicker("setStartDate", minDate);
  $("#txtClaimFrom").datepicker("setEndDate", maxDate);
}

.col-lg-3 { margin-bottom: 180px; }

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.2.0/css/bootstrap.min.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.4.0/css/bootstrap-datepicker.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.4.0/js/bootstrap-datepicker.min.js"></script>
<div class="col-lg-3">
  <label>Claim Month</label>
  <div class="input-group date">
    <input type="text" class="form-control pull-right" id="txtClaimMonth" onchange="MonthDatePick();">
    <div class="input-group-addon bg-purple">
      <i class="fa fa-calendar"></i>
    </div>
  </div>
</div>
<div class="col-lg-3">
  <label>Claim From</label>
  <div class="input-group date">
    <input type="text" class="form-control pull-right" id="txtClaimFrom">
    <div class="input-group-addon bg-purple">
      <i class="fa fa-calendar"></i>
    </div>
  </div>
</div>

---

Alternatively, you could remove the current datepicker and re-initialize it from scratch. Note that Bootstrap Datepicker uses startDate and endDate as options, not minDate and maxDate.

$("#txtClaimFrom").datepicker("remove");
$("#txtClaimFrom").datepicker({
  autoclose: true,
  startDate: minDate,
  endDate: maxDate,
  format: 'dd/mm/yyyy',
  changeMonth: false,
  changeYear: false,
});

$(document).ready(function() {
  $('#txtClaimMonth').datepicker({
    autoclose: true,
    format: "MM yyyy",
    viewMode: "months",
    minViewMode: "months",
  });
  $('#txtClaimFrom').datepicker({
    autoclose: true,
    format: 'dd/mm/yyyy'
  })
});

function MonthDatePick() {
  var month = $('#txtClaimMonth').datepicker('getDate').getMonth() + 1; //('getMonth');            
  var year = $('#txtClaimMonth').datepicker('getDate').getFullYear(); //('getFullYear');   
  var minDate = new Date(year, month - 1, 1);
  var maxDate = new Date(year, month, 0);
  $("#txtClaimFrom").datepicker("remove");
  $("#txtClaimFrom").datepicker({
    autoclose: true,
    startDate: minDate,
    endDate: maxDate,
    format: 'dd/mm/yyyy',
    changeMonth: false,
    changeYear: false,
  });
}

.col-lg-3 {
  margin-bottom: 180px;
}

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.2.0/css/bootstrap.min.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.4.0/css/bootstrap-datepicker.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.4.0/js/bootstrap-datepicker.min.js"></script>
<div class="col-lg-3">
  <label>Claim Month</label>
  <div class="input-group date">
    <input type="text" class="form-control pull-right" id="txtClaimMonth" onchange="MonthDatePick();">
    <div class="input-group-addon bg-purple">
      <i class="fa fa-calendar"></i>
    </div>
  </div>
</div>
<div class="col-lg-3">
  <label>Claim From</label>
  <div class="input-group date">
    <input type="text" class="form-control pull-right" id="txtClaimFrom">
    <div class="input-group-addon bg-purple">
      <i class="fa fa-calendar"></i>
    </div>
  </div>
</div>

Answer 3

You are not using the correct options:

  function MonthDatePick() {
      var month = $('#txtMonth').datepicker('getDate').getMonth() + 1;//('getMonth');            
      var year = $('#txtMonth').datepicker('getDate').getFullYear();//('getFullYear');   
      var minDate = new Date(year, month-1, 1);
      var maxDate = new Date(year,month, 0);
      $("#txtFrom").datepicker({
        autoclose: true,
        startDate: minDate,
        endDate: maxDate,
        format: 'dd/mm/yyyy',
        //defaultDate:minDate,
        changeMonth: false,
        changeYear: false,
      });
    }

Change minDate with startDate and maxDate with endDate

See bootstrap-datepicker documentation