<body>
  <h1>제목1</h1>
  <h1>제목2</h1>
  <table>
    <caption>기본 필터 선택자</caption>
    <colgroup>
      <col>
      <col>
      <col>
    </colgroup>
    <tbody>
      <tr>
        <td>1</td>
        <td>2</td>
        <td>3</td>
      </tr>
      <tr>
        <td>4</td>
        <td>5</td>
        <td>6</td>
      </tr>
      <tr>
        <td>7</td>
        <td>8</td>
        <td>9</td>
      </tr>
      <tr>
        <td>10</td>
        <td>11</td>
        <td>12</td>
      </tr>
    </tbody>
  </table>
  <ul>
    <li class="bg">내용1</li>
    <li class="bg">내용2</li>
    <li class="bg">내용3</li>
    <li>내용4</li>
  </ul>
</body>
table {
  border-collapse: collapse;
  width: 100%;
}
td {
  border: 1px solid #333;
}
li {
  color: white;
  margin: 5px;
}
$(document).ready(function(){
  $("tr:even").css("background", "red");
  $("tr:odd").css("background", "orange");
  $("td:first").css("background", "yellow");
  $("td:last").css("background", "green");
  $(":header").css("background", "blue");
  $("li:eq(0)").css("background", "navy");
  $("li:gt(0)").css("background", "purple");
  $("li:lt(3)").css("border", "4px solid gray");
  $(":root").css("background", "white");
  (function upDown(){
    $("h2").slideToggle(2000,upDown);
  })();
  $(":animated").css("border","1px solid darked");
});

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.1/jquery.min.js