使用jquery为选择框中的选项文本指定样式

<script src="https://cdn.jsdelivr.net/npm/jquery/dist/jquery.min.js"></script>

<select id="mySelect">
  <option value="option1">Option 1</option>
  <option value="option2">Option 2</option>
  <option value="option3">Option 3</option>
</select>

$("#mySelect option").css({
  "color": "red",
  "font-weight": "bold"
});

$("#mySelect option:eq(1)").css("background-color", "blue");