我的目标：
在我的页面中，我有一个display:none的下拉列表，也就是说，如果我没有将其定义为display:block
下拉代码：
<dd id="preview_district" class="dd-true select-auto-scroll">
<div class="uk-width-small-1-1 uk-hidden-medium uk-hidden-large">
<div class="material-select filled">
<span class="material-title">Departamento</span>
</div>
</div>
<div class="material-select filled" data-native-select="true" data-toggle-placeholder="true">
<label for="select-1-preview_district">
<span>(Selecciona)</span>
<strong></strong>
</label>
<input id="select-1-preview_district" type="checkbox">
<span class="material-title">Departamento</span>
<select id="selectPreviewDistrict" name="preview_district" placeholder="Departamento" data-native-select="true" data-toggle-placeholder="true">
<option value="*" disabled="" selected="" hidden="">(Selecciona)</option>
<option value="91">AMAZONAS</option>
<option value="5">ANTIOQUIA</option>
<option value="81">ARAUCA</option>
</select>
<ul class="radio">
<li>
<input id="preview_district-0" value="*" name="preview_district" type="radio">
<label for="preview_district-0">(Selecciona)</label>
</li>
<li>
<input id="preview_district-1" value="91" name="preview_district" type="radio">
<label for="preview_district-1">AMAZONAS</label>
</li>
<li>
</ul>
</div>
<small class="validation-msg uk-text-danger" data-field="preview_district" data-validation="invalid" style="display:none;">Selecciona el departamento</small>
</dd>
在这种情况下，<select id="selectPreviewDistrict" name="preview_district" placeholder="Departamento" data-native-select="true" data-toggle-placeholder="true">与display:none
我正在尝试使用：
browser.executeScript('arguments[0].style.display = "block"', element(by.id('selectPreviewDistrict')).getWebElement());
但元素仍然不可见。
任何帮助？