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モーダルを簡易につくってみる

Last updated at Posted at 2023-01-25

モーダルを簡単に作ってみる
出来上がったやつのサンプルページのリンク、イメージはこんな感じ

image.png

See the Pen Untitled by sueasen (@sueasen) on CodePen.

  • HTML ボタンとモーダル準備
index.html
<!doctype html>
<html>

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,initial-scale=1">
    <link rel="stylesheet" href="./style.css">
</head>

<body>

    <button class="openModalBtn modal-proc">モーダル!</button>

    <section class="modalArea">
        <div class="modalBg modal-proc"></div>
        <div class="modalWrapper">
            <div class="modalContents">
                <h1>モーダル</h1>
                <p>ここは適当に変更する</p>
            </div>
            <div class="closeModalBtn modal-proc">×</div>
        </div>
    </section>

</body>

<script src="script.js"></script>

</html>
  • CSS でモーダルの配置・表示/非表示
style.css
@charset "utf-8";

/* モーダル全体 */
.modalArea {
  visibility: hidden;
  opacity : 0;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transition: .4s;
}

/* モーダル・背景 */
.modalBg {
  width: 100%;
  height: 100%;
  background-color: #000;
  opacity : 0.7;
}

/* モーダル・ダイアログ */
.modalWrapper {
  position: absolute;
  top: 50%;
  left: 50%;
  transform:translate(-50%,-50%);
  width: 70%;
  max-width: 500px;
  padding: 10px 30px;
  background-color: #fff;
}

/* モーダル・閉じるボタン */
.closeModalBtn {
  position: absolute;
  top: 0.5rem;
  right: 1rem;
  cursor: pointer;
}

/* モーダル表示 */
.is-show {
  visibility: visible;
  opacity : 1;
}

/* モーダル表示用ボタン */
.openModalBtn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform:translate(-50%,-50%);
}
  • JavaScript で動きを設定
script.js
/**
 * モーダル操作(表示/非表示ボタン、モーダル・背景)のイベント設定
 */
window.addEventListener('load', (e) => {
    document.querySelectorAll('.modal-proc').forEach(dom => {
        dom.addEventListener('click', () => {
            document.querySelector('.modalArea').classList.toggle('is-show');
        });
    });
});
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