如果选择了选项，则显示 bootstrap 模式，否则打开 url

Question

我正在尝试将 jquery 的两个不同功能合并为一个功能。

第一个功能是选择下拉菜单时，如果 "value" 是 URL，则跳转到 URL，但如果下拉菜单没有 URL然后检查它是否有可以打开的模式！

$(function() {
  // bind change event to select
  $modal = $('#LoginRegister');
  if ($(this).val() === 'LoginRegister') {
    $modal.modal('show');
  } else {
    $('#designselectedchange').on('change', function() {
      var url = $(this).val(); // get selected value
      if (url) { // require a URL
        window.location = url; // redirect
      }
      return false;
    });
  }
});

<script src="https://code.jquery.com/jquery.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet" type="text/css" />
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<select title="Select Design" class="selectpicker" id="designselectedchange" name="design">
  <option value="/frequently-asked-questions/index.html?question=client-id-register-login-view-progress-previous-order-quotations">pop up</option>
  <option value="LoginRegister">Login modal</option>
</select>

<div class="modal fade" id="LoginRegister" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
        <h4 class="modal-title">Login/Register</h4>
      </div>
      <div class="modal-body">
        test
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
      </div>
    </div>
    <!-- /.modal-content -->
  </div>
  <!-- /.modal-dialog -->
</div>
<!-- /.modal -->

Answer 1

当然可以。因为问题不在于函数本身，而在于 if 语句和更改侦听器。

您需要以不同的方式组织代码。

监听下拉菜单的变化事件。
检查值是多少，并以此为基础，调用模态/重定向。

像这样：

$(function() {
  $('#designselectedchange').on('change', function() {
    if ($(this).val() === 'LoginRegister') {
      $('#LoginRegister').modal('show');
    } else {
      var url = $(this).val(); // get selected value
      if (url) { // require a URL
        window.location = url; // redirect
      }
    }
  });
});

<script src="https://code.jquery.com/jquery.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet" type="text/css" />
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<select title="Select Design" class="selectpicker" id="designselectedchange" name="design">
  <option value="/frequently-asked-questions/index.html?question=client-id-register-login-view-progress-previous-order-quotations">pop up</option>
  <option value="LoginRegister">Login modal</option>
</select>

<div class="modal fade" id="LoginRegister" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
        <h4 class="modal-title">Login/Register</h4>
      </div>
      <div class="modal-body">
        test
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
      </div>
    </div>
    <!-- /.modal-content -->
  </div>
  <!-- /.modal-dialog -->
</div>
<!-- /.modal -->

Answer 2

更简单的解决方案 - 测试第一个字符是否为 ID：

$(function() {
  $('#designselectedchange').on('change', function() {
    var val = $(this).val();
    if (val) {
      if (val.indexOf("#") === 0) $(val).modal('show');
      else window.location = val;
    };
  });
});

<select title="Select Design" class="selectpicker" id="designselectedchange" name="design">
  <option value="/frequently-asked-questions/index.html">pop up</option>
  <option value="#LoginRegister">Login modal</option>
</select>

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