2026-css-column-rule/grid-rule.html at main · codegrid/2026-css-column-rule · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
<!DOCTYPE html>
<html lang="ja">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Demo</title>
  <link rel="stylesheet" href="style.css">
  <style>
    .grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }

    .grid div {
      padding: 12px;
      background: #f4f4f4;
      border-radius: 4px;
      text-align: center;
    }

    /* 縦方向の隙間だけに線を引く */
    .grid.is-column {
      column-rule: 2px solid #c00;
    }

    /* 横方向の隙間だけに線を引く */
    .grid.is-row {
      row-rule: 2px solid #c00;
    }

    /* 縦横まとめて線を引く */
    .grid.is-both {
      rule: 2px solid #c00;
    }
  </style>
</head>
<body class="needs-gap-decorations">
  <div class="controls">
    <label><input type="radio" name="mode" value="none">指定なし</label>
    <label><input type="radio" name="mode" value="is-column">column-rule</label>
    <label><input type="radio" name="mode" value="is-row">row-rule</label>
    <label><input type="radio" name="mode" value="is-both" checked>rule（縦横まとめて）</label>
  </div>

  <div class="grid is-both" id="grid">
    <div>1</div>
    <div>2</div>
    <div>3</div>
    <div>4</div>
    <div>5</div>
    <div>6</div>
    <div>7</div>
    <div>8</div>
    <div>9</div>
  </div>

  <script>
    const grid = document.getElementById("grid");
    const modes = ["is-column", "is-row", "is-both"];

    document.querySelectorAll('input[name="mode"]').forEach((input) => {
      input.addEventListener("change", () => {
        grid.classList.remove(...modes);
        if (input.value !== "none") {
          grid.classList.add(input.value);
        }
      });
    });
  </script>
</body>
</html>