Question

我有一周中的主要下拉菜单，每天都有一个同名的子下拉菜单。现在当表单发布时我们无法获得所选的值，因此我们需要重置所有其他子菜单并仅发送实际选择的值

 <div style='display:none; ' id='todayt'>
<select name="date" class="form-control input-lg form-el" >    
<option value="">What time?</option>
<option value="12:30 PM">12:30 PM</option>
<option value="1:00 PM">1:00 PM</option><option value="1:30 PM">1:30 PM</option>
<option value="2:00 PM">2:00 PM</option><option value="2:30 PM">2:30 PM</option><option value="3:00 PM">3:00 PM</option><option value="3:30 PM">3:30 PM</option><option value="4:00 PM">4:00 PM</option><option value="4:30 PM">4:30 PM</option><option value="5:00 PM">5:00 PM</option><option value="5:30 PM">5:30 PM</option></select>
</div>

<div style='display:none; ' id='tomorrowt'><select name="date" class="form-control input-lg form-el" >    
<option value="">What time?</option>
<option value="9:30 AM">9:30 AM</option>
<option value="10:00 AM">10:00 AM</option>
<option value="10:30 AM">10:30 AM</option>
<option value="11:00 AM">11:00 AM</option>
<option value="11:30 AM">11:30 AM</option>
<option value="12:00 PM">12:00 PM</option>
<option value="12:30 PM">12:30 PM</option>
<option value="1:00 PM">1:00 PM</option>
<option value="1:30 PM">1:30 PM</option>
<option value="2:00 PM">2:00 PM</option>
<option value="2:30 PM">2:30 PM</option>
<option value="3:00 PM">3:00 PM</option>
<option value="3:30 PM">3:30 PM</option>
<option value="4:00 PM">4:00 PM</option>
<option value="4:30 PM">4:30 PM</option>
<option value="5:00 PM">5:00 PM</option>
<option value="5:30 PM">5:30 PM</option></select>
</div>

<div style='display:none; ' id='aftertomt'><select name="date" class="form-control input-lg form-el" >    
<option value="">What time?</option>
<option value="9:30 AM">9:30 AM</option>
<option value="10:00 AM">10:00 AM</option>
<option value="10:30 AM">10:30 AM</option>
<option value="11:00 AM">11:00 AM</option>
<option value="11:30 AM">11:30 AM</option>
<option value="12:00 PM">12:00 PM</option>
<option value="12:30 PM">12:30 PM</option>
<option value="1:00 PM">1:00 PM</option>
<option value="1:30 PM">1:30 PM</option>
<option value="2:00 PM">2:00 PM</option>
<option value="2:30 PM">2:30 PM</option>
<option value="3:00 PM">3:00 PM</option>
<option value="3:30 PM">3:30 PM</option>
<option value="4:00 PM">4:00 PM</option>
<option value="4:30 PM">4:30 PM</option>
<option value="5:00 PM">5:00 PM</option>
<option value="5:30 PM">5:30 PM</option></select>
</div>


<div style='display:none; ' id='day4'><select name="date" class="form-control input-lg form-el" >    <option value="">What time?</option>
<option value="9:30 AM">9:30 AM</option>
<option value="10:00 AM">10:00 AM</option>
<option value="10:30 AM">10:30 AM</option>
<option value="11:00 AM">11:00 AM</option>
<option value="11:30 AM">11:30 AM</option>
<option value="12:00 PM">12:00 PM</option>
<option value="12:30 PM">12:30 PM</option>
<option value="1:00 PM">1:00 PM</option>
<option value="1:30 PM">1:30 PM</option>
<option value="2:00 PM">2:00 PM</option>
<option value="2:30 PM">2:30 PM</option>
<option value="3:00 PM">3:00 PM</option>
<option value="3:30 PM">3:30 PM</option>
<option value="4:00 PM">4:00 PM</option>
<option value="4:30 PM">4:30 PM</option>
<option value="5:00 PM">5:00 PM</option>
<option value="5:30 PM">5:30 PM</option></select>
</div>

<div style='display:none; ' id='day5'>
<select name="date" class="form-control input-lg form-el" >  
<option value="">What time?</option>
<option value="9:30 AM">9:30 AM</option>
<option value="10:00 AM">10:00 AM</option>
<option value="10:30 AM">10:30 AM</option>
<option value="11:00 AM">11:00 AM</option>
<option value="11:30 AM">11:30 AM</option>
<option value="12:00 PM">12:00 PM</option>
<option value="12:30 PM">12:30 PM</option>
<option value="1:00 PM">1:00 PM</option>
<option value="1:30 PM">1:30 PM</option>
<option value="2:00 PM">2:00 PM</option>
<option value="2:30 PM">2:30 PM</option>
<option value="3:00 PM">3:00 PM</option>
<option value="3:30 PM">3:30 PM</option>
<option value="4:00 PM">4:00 PM</option>
<option value="4:30 PM">4:30 PM</option>
<option value="5:00 PM">5:00 PM</option>
<option value="5:30 PM">5:30 PM</option></select>
</div>

<div style='display:none; ' id='day6'>
<select name="date" class="form-control input-lg form-el" >   
<option value="">What time?</option>
<option value="9:30 AM">9:30 AM</option>
<option value="10:00 AM">10:00 AM</option>
<option value="10:30 AM">10:30 AM</option>
<option value="11:00 AM">11:00 AM</option>
<option value="11:30 AM">11:30 AM</option>
<option value="12:00 PM">12:00 PM</option>
<option value="12:30 PM">12:30 PM</option>
<option value="1:00 PM">1:00 PM</option>
<option value="1:30 PM">1:30 PM</option>
<option value="2:00 PM">2:00 PM</option>
<option value="2:30 PM">2:30 PM</option>
<option value="3:00 PM">3:00 PM</option>
<option value="3:30 PM">3:30 PM</option>
<option value="4:00 PM">4:00 PM</option>
<option value="4:30 PM">4:30 PM</option>
<option value="5:00 PM">5:00 PM</option>
<option value="5:30 PM">5:30 PM</option></select>
</div>

<div style='display:none; ' id='day7'>
<select name="date" class="form-control input-lg form-el" >    
 <option value="">What time?</option>
<option value="9:30 AM">9:30 AM</option>
<option value="10:00 AM">10:00 AM</option>
<option value="10:30 AM">10:30 AM</option>
<option value="11:00 AM">11:00 AM</option>
<option value="11:30 AM">11:30 AM</option>
<option value="12:00 PM">12:00 PM</option>
<option value="12:30 PM">12:30 PM</option>
<option value="1:00 PM">1:00 PM</option>
<option value="1:30 PM">1:30 PM</option>
<option value="2:00 PM">2:00 PM</option>
<option value="2:30 PM">2:30 PM</option>
<option value="3:00 PM">3:00 PM</option>
<option value="3:30 PM">3:30 PM</option>
<option value="4:00 PM">4:00 PM</option>
<option value="4:30 PM">4:30 PM</option>
<option value="5:00 PM">5:00 PM</option>
<option value="5:30 PM">5:30 PM</option></select>
</div>                      

    <br><br>

<option value="">What time?</option>

当我们发送表单时，结果为空，因为所选选项是

{{1}}

如果你从主/子菜单中选择日期和时间，它们会移动到另一个日期和另一个日期的时间，它将仅发布第一个值，我们需要它重置并发布最后一个真正选择的选项值

我们只需要获得实际选定选项值的结果。

Answer 1

查看以下解决方案，它保留当前选定的值并重置其他值。

//select the selects into an variable using querySelectorAll
var selects = document.querySelectorAll("select[name='date']");

//attach an onchange event to all selects. -- Use Array.prototype.forEach to iterate over nodelist
Array.prototype.forEach.call(selects, function(element){
  element.addEventListener("change", setPostValues);
});


function setPostValues()
{
  var self = this;
  //when element is not the changed element, reset to initial value.
  Array.prototype.forEach.call(selects, function(element){
    if (element != self)
    {
      element.value = "";
    }
  });  
}

div{
  display: block !important;
}

<div style='display:none; ' id='todayt'>
<select name="date" class="form-control input-lg form-el" >    
<option value="">What time?</option>
<option value="12:30 PM">12:30 PM</option>
<option value="1:00 PM">1:00 PM</option><option value="1:30 PM">1:30 PM</option>
<option value="2:00 PM">2:00 PM</option><option value="2:30 PM">2:30 PM</option><option value="3:00 PM">3:00 PM</option><option value="3:30 PM">3:30 PM</option><option value="4:00 PM">4:00 PM</option><option value="4:30 PM">4:30 PM</option><option value="5:00 PM">5:00 PM</option><option value="5:30 PM">5:30 PM</option></select>
</div>

<div style='display:none; ' id='tomorrowt'><select name="date" class="form-control input-lg form-el" >    
<option value="">What time?</option>
<option value="9:30 AM">9:30 AM</option>
<option value="10:00 AM">10:00 AM</option>
<option value="10:30 AM">10:30 AM</option>
<option value="11:00 AM">11:00 AM</option>
<option value="11:30 AM">11:30 AM</option>
<option value="12:00 PM">12:00 PM</option>
<option value="12:30 PM">12:30 PM</option>
<option value="1:00 PM">1:00 PM</option>
<option value="1:30 PM">1:30 PM</option>
<option value="2:00 PM">2:00 PM</option>
<option value="2:30 PM">2:30 PM</option>
<option value="3:00 PM">3:00 PM</option>
<option value="3:30 PM">3:30 PM</option>
<option value="4:00 PM">4:00 PM</option>
<option value="4:30 PM">4:30 PM</option>
<option value="5:00 PM">5:00 PM</option>
<option value="5:30 PM">5:30 PM</option></select>
</div>

<div style='display:none; ' id='aftertomt'><select name="date" class="form-control input-lg form-el" >    
<option value="">What time?</option>
<option value="9:30 AM">9:30 AM</option>
<option value="10:00 AM">10:00 AM</option>
<option value="10:30 AM">10:30 AM</option>
<option value="11:00 AM">11:00 AM</option>
<option value="11:30 AM">11:30 AM</option>
<option value="12:00 PM">12:00 PM</option>
<option value="12:30 PM">12:30 PM</option>
<option value="1:00 PM">1:00 PM</option>
<option value="1:30 PM">1:30 PM</option>
<option value="2:00 PM">2:00 PM</option>
<option value="2:30 PM">2:30 PM</option>
<option value="3:00 PM">3:00 PM</option>
<option value="3:30 PM">3:30 PM</option>
<option value="4:00 PM">4:00 PM</option>
<option value="4:30 PM">4:30 PM</option>
<option value="5:00 PM">5:00 PM</option>
<option value="5:30 PM">5:30 PM</option></select>
</div>


<div style='display:none; ' id='day4'><select name="date" class="form-control input-lg form-el" >    <option value="">What time?</option>
<option value="9:30 AM">9:30 AM</option>
<option value="10:00 AM">10:00 AM</option>
<option value="10:30 AM">10:30 AM</option>
<option value="11:00 AM">11:00 AM</option>
<option value="11:30 AM">11:30 AM</option>
<option value="12:00 PM">12:00 PM</option>
<option value="12:30 PM">12:30 PM</option>
<option value="1:00 PM">1:00 PM</option>
<option value="1:30 PM">1:30 PM</option>
<option value="2:00 PM">2:00 PM</option>
<option value="2:30 PM">2:30 PM</option>
<option value="3:00 PM">3:00 PM</option>
<option value="3:30 PM">3:30 PM</option>
<option value="4:00 PM">4:00 PM</option>
<option value="4:30 PM">4:30 PM</option>
<option value="5:00 PM">5:00 PM</option>
<option value="5:30 PM">5:30 PM</option></select>
</div>

<div style='display:none; ' id='day5'>
<select name="date" class="form-control input-lg form-el" >  
<option value="">What time?</option>
<option value="9:30 AM">9:30 AM</option>
<option value="10:00 AM">10:00 AM</option>
<option value="10:30 AM">10:30 AM</option>
<option value="11:00 AM">11:00 AM</option>
<option value="11:30 AM">11:30 AM</option>
<option value="12:00 PM">12:00 PM</option>
<option value="12:30 PM">12:30 PM</option>
<option value="1:00 PM">1:00 PM</option>
<option value="1:30 PM">1:30 PM</option>
<option value="2:00 PM">2:00 PM</option>
<option value="2:30 PM">2:30 PM</option>
<option value="3:00 PM">3:00 PM</option>
<option value="3:30 PM">3:30 PM</option>
<option value="4:00 PM">4:00 PM</option>
<option value="4:30 PM">4:30 PM</option>
<option value="5:00 PM">5:00 PM</option>
<option value="5:30 PM">5:30 PM</option></select>
</div>

<div style='display:none; ' id='day6'>
<select name="date" class="form-control input-lg form-el" >   
<option value="">What time?</option>
<option value="9:30 AM">9:30 AM</option>
<option value="10:00 AM">10:00 AM</option>
<option value="10:30 AM">10:30 AM</option>
<option value="11:00 AM">11:00 AM</option>
<option value="11:30 AM">11:30 AM</option>
<option value="12:00 PM">12:00 PM</option>
<option value="12:30 PM">12:30 PM</option>
<option value="1:00 PM">1:00 PM</option>
<option value="1:30 PM">1:30 PM</option>
<option value="2:00 PM">2:00 PM</option>
<option value="2:30 PM">2:30 PM</option>
<option value="3:00 PM">3:00 PM</option>
<option value="3:30 PM">3:30 PM</option>
<option value="4:00 PM">4:00 PM</option>
<option value="4:30 PM">4:30 PM</option>
<option value="5:00 PM">5:00 PM</option>
<option value="5:30 PM">5:30 PM</option></select>
</div>

<div style='display:none; ' id='day7'>
<select name="date" class="form-control input-lg form-el" >    
 <option value="">What time?</option>
<option value="9:30 AM">9:30 AM</option>
<option value="10:00 AM">10:00 AM</option>
<option value="10:30 AM">10:30 AM</option>
<option value="11:00 AM">11:00 AM</option>
<option value="11:30 AM">11:30 AM</option>
<option value="12:00 PM">12:00 PM</option>
<option value="12:30 PM">12:30 PM</option>
<option value="1:00 PM">1:00 PM</option>
<option value="1:30 PM">1:30 PM</option>
<option value="2:00 PM">2:00 PM</option>
<option value="2:30 PM">2:30 PM</option>
<option value="3:00 PM">3:00 PM</option>
<option value="3:30 PM">3:30 PM</option>
<option value="4:00 PM">4:00 PM</option>
<option value="4:30 PM">4:30 PM</option>
<option value="5:00 PM">5:00 PM</option>
<option value="5:30 PM">5:30 PM</option></select>
</div>                      

    <br><br>

主要下拉列表与7个子下拉列表同名重置

1 个答案: