我有一个下拉菜单,它位于一个框内。我希望下拉菜单填满整个框。宽度已经填满整个框,但我找不到改变下拉菜单高度的方法。
我尝试使用height和调整padding,但我无法找到答案。
<div class="custom_select" id="main_dropdown_menu">
<select class="dropdown_list" name="list of majors" id="main_dropdown">
<option value="default" selected="selected" id="submenu">---</option>
<option value="arts">Arts</option>
<option value="business">Business</option>
<option value="engineering">Engineering</option>
<option value="health">Health</option>
<option value="humanities">Humanities</option>
<option value="natural sciences">Natural Sciences</option>
<option value="social sciences">Social Sciences</option>
</select>
</div>