jquery - 无法在选择时隐藏 div

Question

我正在div根据输入用户动态添加 s。

问题是div“添加新用户”，而不是减少divs（当我减少 的数量时input）它正在添加divs。请参阅代码 https://jsfiddle.net/alessiow/n9xskt28/81/

$(function() {
  $(".instancesN").change(function() {
    var value = $(this).val();
    $(".instancesNContainer").empty();
    for (var i = 1; i < value; i++) {
      var block = $("<div>", {
        class: "block"
      });
      $(block).append($("div.instancesNSpecifics").html());
      $(".instancesNContainer").prepend(block);
    }
  });



  $(".instancesNContainer").on('change', '.usersvmaddnewdivsN', function() {
    var value = $(this).val();
    $(".usersvmaddnewdivsNContainer").empty();
    for (var i = 1; i < value; i++) {
      var block = $("<div>", {
        class: "block"
      });
    }
    $(this).parent().append($("div.usersvmaddnewdivsNSpecifics").html());
    $(".usersvmaddnewdivsNContainer").append(block);

  });

  $("div.instancesNSpecifics").on('change', '.usersvmaddnewdivsN', function() {
    var value = $(this).val();
    $(".usersvmaddnewdivsNContainer").empty();
    for (var i = 1; i < value; i++) {
      var block = $("<div>", {
        class: "block"
      });
    }
    $(this).parent().append($("div.usersvmaddnewdivsNSpecifics").html());
    $(".usersvmaddnewdivsNContainer").append(block);


  });
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type='number' min="1" oninput="validity.valid||(value='1');" value="1" name='instancesN[]' placeholder="Instances #" class="instancesN form-control" />
<div class="instancesNContainer"></div>
<div class='instancesNSpecifics'>
  <input type='number' min="1" oninput="validity.valid||(value='');" name='usersvmaddnewdivsN[]' placeholder="Add new Users" class="form-control usersvmaddnewdivsN" />
  <div class="usersvmaddnewdivsNContainer"></div>
  <div class='usersvmaddnewdivsNSpecifics'>
    <div class="form-row">
      <div class="col">
        <input type="text" class="form-control usernamevmN" name='usernamevmN[]' placeholder="VM-Username" />
      </div>
    </div>
  </div>
</div>

标签： jqueryhtmlinput