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表の4行の列を一つの要素として表示するコード

Last updated at Posted at 2025-10-19

1. 今回の目的の表

まずはヘッダーとデータを一つの要素として持ち、それぞれの要素を結合した形式

image.png

<!DOCTYPE html>
<html lang="ja">
<head>
  <meta charset="UTF-8" />
  <title>サンプル表</title>
  <style>
    table {
      border-collapse: collapse;
      width: 600px;
    }
    th, td {
      border: 1px solid #999;
      padding: 8px;
      text-align: center;
    }
    th {
      background-color: #f2f2f2;
    }
  </style>
</head>
<body>
<br>
  <table>
    <thead>
      <tr>
        <th rowspan="5">No.</th>
        <th rowspan="5">項目名</th>
        <th colspan="5">サンプルヘッダー</th>
        <th rowspan="5">備考</th>
      </tr>
      <tr>
        <th>上段</th>
      </tr>
      <tr>
        <th>上段</th>
      </tr>
      <tr>
        <th>上段</th>
      </tr>
      <tr>
        <th>上段</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td rowspan="5">1</td>
        <td rowspan="5">データA</td>
        <td colspan="5">値1</td>
        <td rowspan="5">テスト用コメント</td>
      </tr>
      <tr>
        <td>値3</td>
      </tr>
      <tr>
        <td>値3</td>
      </tr>
      <tr>
        <td>値3</td>
      </tr>
      <tr>
        <td>値3</td>
      </tr>
    </tbody>
  </table>
</body>
</html>

2. 別のパターン

次にヘッダー、データを一つのデータとして持って、見た目だけ縦に表示させる形式

image.png

<html lang="ja">
<head>
  <meta charset="UTF-8" />
  <title>サンプル表</title>
  <style>
    table {
      border-collapse: collapse;
      width: 600px;
    }
    th, td {
      border: 1px solid #999;
      padding: 8px;
      text-align: center;
    }
    th {
      background-color: #f2f2f2;
    }
    /* 「サンプルヘッダー」列(縦に要素2つを持つ) */
    .complex-header {
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      height: 80px;
    }
    .complex-header .title {
      font-weight: bold;
      border-bottom: 1px solid black;
      width: 100%;
      padding-bottom: 2px;
    }
    .complex-header .sub {
      display: flex;
      flex-direction: column;
      line-height: 1.2;
      margin-top: 3px;
    }
  </style>
</head>
<body>
  <table>
    <thead>
      <tr>
        <th>No.</th>
        <th>項目名</th>
        <th>
          <div class="complex-header">
            <div class="title">サンプルヘッダー</div>
            <div class="sub">
              <div>上段</div>
              <div>中段</div>
              <div>下段</div>

            </div>
          </div>
        </th>
        <th>備考</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td>1</td>
        <td>データA</td>
        <td>
          <div>値1</div>
          <div>値2</div>
          <div>値3</div>
        </td>
        <td>テスト用コメント</td>
      </tr>
    </tbody>
  </table>
</body>
</html>
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