<select >
<option disabled style="display: none" selected value>请选择</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
</select>
<select >
<option disabled hidden selected>请选择用户类型</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
</select>
chrome 下拉不显示请选择
Firefox 下拉不显示请选择
Safari 下拉显示请选择
hidden不支持ie11以下