样式 select::-ms-禁用时展开

Style select::-ms-expand when disabled

如何在 select::-ms-expand 禁用时更改它的背景颜色?

select::-ms-expand{
    background: #f60;
}

只需在::-ms-expand前加上:disabled,像这样:

select:disabled::-ms-expand {
    background: #f60;
}
<select>
  <option>Enabled</option>
</select>
<select disabled>
  <option>Disabled</option>
</select>