默认情况下打开引导面板时，select2 输入的宽度变小

Question

里面的引导panel我有一个form，我使用select2的选择输入。

的问题是，当我定义了panel要由默认关闭（通过去除in从所述class="panel-collapse collapse"）所述的宽度select2输入变得越来越小！

$('.js-example-basic-single').select2({
  placeholder: "Select...",
  allowClear: true
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.5/js/select2.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" rel="stylesheet" />
<link href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.5/css/select2.css" rel="stylesheet" />



<div class="container-fluid">
  <div class="row">
    <div class="col-xs-10">
      <div class="panel-group" id="accordion" role="tablist" aria-multiselectable="true">
        <div class="panel panel-default">
          <div class="panel-heading" role="tab" id="headingOne">
            <h4 class="panel-title">
              <a role="button" data-toggle="collapse" data-parent="#accordion" href="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
                <i class="fa fa-plus mright-1"></i> closed by default
              </a>
            </h4>
          </div>
          <div id="collapseOne" class="panel-collapse collapse" role="tabpanel" aria-labelledby="headingOne">
            <div class="panel-body">
              <form id="form" method="post" action="rpt-action?do=rpt-request-change-mould-submit" class="form-horizontal" role="form">
                <fieldset>

                  <div class="form-group">
                    <label for="inputName" class="col-xs-2 control-label">Status</label>
                    <div class="col-xs-10">
                      <select name="action" class="js-example-basic-single js-states form-control" required>
                        <option></option>
                        <option value="toPrepare">Prepare</option>
                        <option value="toProduction">Produce</option>
                      </select>
                    </div>
                  </div>

                  <div class="form-group">
                    <label for="inputName" class="col-xs-2 control-label">Notes</label>
                    <div class="col-xs-10">
                      <textarea class="form-control" name="comments" rows="3" /></textarea>
                    </div>
                  </div>


                  <div class="col-xs-2">
                    <button type="submit" name="formAction" value="next" class="btn btn-primary">submit</button>
                  </div>
                </fieldset>
              </form>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>

<div class="container-fluid">
  <div class="row">
    <div class="col-xs-10">
      <div class="panel-group" id="accordion2" role="tablist" aria-multiselectable="true">
        <div class="panel panel-default">
          <div class="panel-heading" role="tab" id="headingOne">
            <h4 class="panel-title">
              <a role="button" data-toggle="collapse" data-parent="#accordion2" href="#collapseOne2" aria-expanded="true" aria-controls="collapseOne">
                <i class="fa fa-plus mright-1"></i> open by default
              </a>
            </h4>
          </div>
          <div id="collapseOne2" class="panel-collapse collapse in" role="tabpanel" aria-labelledby="headingOne">
            <div class="panel-body">
              <form id="form" method="post" action="rpt-action?do=rpt-request-change-mould-submit" class="form-horizontal" role="form">
                <fieldset>

                  <div class="form-group">
                    <label for="inputName" class="col-xs-2 control-label">Status</label>
                    <div class="col-xs-10">
                      <select name="action" class="js-example-basic-single js-states form-control" required>
                        <option></option>
                        <option value="toPrepare">Prepare</option>
                        <option value="toProduction">Produce</option>
                      </select>
                    </div>
                  </div>

                  <div class="form-group">
                    <label for="inputName" class="col-xs-2 control-label">Notes</label>
                    <div class="col-xs-10">
                      <textarea class="form-control" name="comments" rows="3" /></textarea>
                    </div>
                  </div>


                  <div class="col-xs-2">
                    <button type="submit" name="formAction" value="next" class="btn btn-primary">submit</button>
                  </div>
                </fieldset>
              </form>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>

但是，如果我将in类添加到类中，则select2输入跟随其父列！

我不明白为什么会这样......有什么想法可以解决吗？

Answer 1

您可以使用插件的width 选项轻松解决此问题，在这种特殊情况下使用width: "100%"将修复它，如下所示：

$('.js-example-basic-single').select2({
    placeholder: "Select...",
    allowClear: true,
    width: "100%"
});

检查工作示例：

$('.js-example-basic-single').select2({
    placeholder: "Select...",
    allowClear: true,
    width: "100%"
});

$('.js-example-basic-single').select2({
  placeholder: "Select...",
  allowClear: true,
  width: "100%"
});