取消单身日期

Question

我正在使用 daterangepicker v3.0.3 并使用以下代码将所有具有 .date 类的输入初始化为它们是单个日期选择器：

function checkDateInput() {
  var input = document.createElement('input');
  input.setAttribute('type','date');

  var notADateValue = 'not-a-date';
  input.setAttribute('value', notADateValue); 

  return (input.value !== notADateValue);
}

// Check if the browser supports the <input type="date" />
if (checkDateInput()) {
  // Change the types on the inputs that are dates
  $('.date').prop('type', 'date');
} else {
  // Iterate through each <input class="date" ... />
  $.each($('.date'), function(key, value) {
    $(value).daterangepicker({
      drops: "up",
      showDropdowns: true,
      singleDatePicker: true,
    });
  });
}

<!-- jquery -->
<script src="https://cdn.jsdelivr.net/jquery/latest/jquery.min.js"></script>

<!-- bootstrap -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.6/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/js/bootstrap.min.js"></script>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" rel="stylesheet"/>

<!-- daterangepicker -->
<script src="https://cdn.jsdelivr.net/npm/daterangepicker/daterangepicker.min.js"></script>
<script src="https://cdn.jsdelivr.net/momentjs/latest/moment.min.js"></script>
<link href="https://cdn.jsdelivr.net/npm/daterangepicker/daterangepicker.css" rel="stylesheet"/>

<form>
  <fieldset>
    <legend>Dates</legend>
    <div class="form-group">
      <label for="date_written">Date Written</label>
      <input class="form-control date" id="date_written" name="date_written" required="required" />
    </div>
    <div class="form-group">
      <label for="effective_date">Effective Date</label>
      <input class="form-control date" id="effective_date" name="effective_date" required="required" />
    </div>
    <div class="form-group">
      <label for="cancellation_date">Cancellation Date</label>
      <input class="form-control date" id="cancellation_date" name="cancellation_date" />
    </div>
  </fieldset>
  <button type="submit" class="btn btn-success">Submit</button>
</form>

我遇到的问题是，如果我决定不选择日期并在日历外单击，它会自动输入今天的日期，而我宁愿它根本不插入任何内容。我假设我需要将autoUpdateInput 设置为 False，但如果实际选择了日期，我不知道如何手动更新输入。

Answer 1

虽然将回调传递给构造函数是侦听所选日期范围内更改的最简单方法，但您也可以在每次单击应用按钮时执行某些操作，即使选择没有更改

 
function checkDateInput() {
  var input = document.createElement('input');
  input.setAttribute('type','date');

  var notADateValue = 'not-a-date';
  input.setAttribute('value', notADateValue); 
return false;
   
  return (input.value !== notADateValue);
}

// Check if the browser supports the <input type="date" />
if (checkDateInput()) {
  // Change the types on the inputs that are dates
  $('.date').prop('type', 'date');
} else {
  // Iterate through each <input class="date" ... />
  $.each($('.date'), function(key, value) {
    $(value).daterangepicker({
      drops: "auto",
      showDropdowns: true,
      singleDatePicker: true,
       autoUpdateInput: false,        
    }).on('hide.daterangepicker', function(ev, picker) {
       //do something, like clearing an input    
     // $(this).val(''); if you want to clear un comment this
   }).on('apply.daterangepicker', function(ev, picker) {
        $(this).val(picker.startDate.format('YYYY-MM-DD'));                
   });   
  });
}

<!-- jquery -->
<script src="https://cdn.jsdelivr.net/jquery/latest/jquery.min.js"></script>

<!-- bootstrap -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.6/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/js/bootstrap.min.js"></script>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" rel="stylesheet"/>

<!-- daterangepicker -->
<link href="https://cdn.jsdelivr.net/npm/daterangepicker/daterangepicker.css" rel="stylesheet"/>
<script src="https://cdn.jsdelivr.net/momentjs/latest/moment.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/daterangepicker/daterangepicker.min.js"></script>


<div class="container">
<form>
  <fieldset>
    <legend>Dates</legend>
    <div class="form-group">
      <label for="date_written">Date Written</label>
      <input class="form-control date" id="date_written" name="date_written" required="required" />
    </div>
    <div class="form-group">
      <label for="effective_date">Effective Date</label>
      <input class="form-control date" id="effective_date" name="effective_date" required="required" />
    </div>
    <div class="form-group">
      <label for="cancellation_date">Cancellation Date</label>
      <input class="form-control date" id="cancellation_date" name="cancellation_date" />
    </div>
  </fieldset>
  <button type="submit" class="btn btn-success">Submit</button>
</form>
</div>

Answer 2

如果我理解要求，解决方案应该更改autoUpdateInput: false 并同时处理'apply.daterangepicker' 和'cancel.daterangepicker'

我只报告下面更改的那段代码

    $.each($('.date'), function(key, value) {

    $(value).daterangepicker({
    drops: "up",
    showDropdowns: true,
    singleDatePicker: true,
    autoUpdateInput: false 
  });

  $(value).on('apply.daterangepicker', function(ev, picker) {
    $(this).val(picker.startDate.format('MM/DD/YYYY')); 
  });

  $(value).on('cancel.daterangepicker', function(ev, picker) {
    $(this).val('');
    });

另外，我认为你应该这样change the order of inclusion of js：

    <!-- daterangepicker -->
<!-- FR: https://github.com/dangrossman/daterangepicker/issues/320 switched js loading order -->
<script src="https://cdn.jsdelivr.net/momentjs/latest/moment.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/daterangepicker/daterangepicker.js"></script>
<link href="https://cdn.jsdelivr.net/npm/daterangepicker/daterangepicker.css" rel="stylesheet"/>