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HTML

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About the <head>

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Insecure Resource

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CSS

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CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

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JavaScript

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JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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HTML 

              
                <header class="header">
  <nav class="header-nav">
    <ul class="header-list">
      <li class="header-item"><a href="#anchor01">HOME</a></li>
      <li class="header-item"><a href="#anchor02">ABOUT</a></li>
      <li class="header-item"><a href="#anchor03">SHOP</a></li>
      <li class="header-item"><a href="#anchor04">NEWS</a></li>
    </ul>
  </nav>
</header>
<!-- メインコンテンツ -->
<main>
  <section class="section01" id="anchor01">
    <h2 class="section-title">HOME</h2>
  </section>
  <section class="section02" id="anchor02">
    <h2 class="section-title">ABOUT</h2>
  </section>
  <section class="section03" id="anchor03">
    <h2 class="section-title">SHOP</h2>
    <div class="video-wrapper js-video">
      <video muted playsinline controls>
        <source
          src="https://junpei-sugiyama.com/wp-content/uploads/2022/03/sample.mp4"
          type="video/mp4"
        />
      </video>
    </div>
  </section>
  <section class="section04" id="anchor04">
    <h2 class="section-title">NEWS</h2>
  </section>
</main>
!

CSS 

              
                /* 動画のスタイル */
.video-wrapper {
  text-align: center;
}
.video-wrapper video {
  width: 50%;
}

/* スムーズスクロールとヘッダーのスタイル */
html {
  scroll-behavior: smooth; /* スムーズスクロールを有効化 */
  scroll-padding-top: 70px; /* ヘッダーの高さ */
}

/* ヘッダー部分のスタイル */
.header {
  background-color: #ff9393; /* 背景色 */
  color: #fff; /* テキスト色 */
  position: fixed; /* 固定 */
  top: 0; /* 上からの位置 */
  transition: top .5s; /* アニメーション効果を追加 */
  width: 100%; /* 幅を100%に */
}

/* ヘッダーリストのスタイル */
.header-list {
  align-items: center; /* 垂直方向中央揃え */
  display: flex; /* 横並びに配置 */
  height: 70px; /* ヘッダーの高さ */
  justify-content: center; /* 左右中央寄せ */
}

/* ヘッダーアイテムのスタイル */
.header-item a {
  color: #fff; /* テキスト色 */
  padding: 10px; /* 内側の余白 */
  text-decoration: none; /* デフォルトの下線を消す */
}

/* セクションのスタイル */
section {
  background-color: rgba(255, 255, 255, .1);
  background-image: repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(255, 1, 1, .1) 10px, rgba(255, 1, 1, .1) 20px );
  background-size: auto auto;
  min-height: 300px;
  padding-bottom: 50px;
}

/* セクションタイトルのスタイル */
.section-title {
  color: #333;
  font-size: 50px;
  text-align: center;
}

/* 各セクションの背景色 */
.section01 {
  background-color: #e2ffc6;
  padding-top: 70px;
}
.section02 {
  background-color: #c6ffff;
}
.section03 {
  background-color: #ffc6ff;
}
.section04 {
  background-color: #ffe2c6;
}
!

JS 

              
                // ページの読み込みが完了したときに実行する関数を設定
window.addEventListener(
  "load",
  function () {
    // 動画を再生する関数を定義
    function playVideos(videoWrappers) {
      // 動画が再生される位置を計算する
      const startPosition = window.pageYOffset + window.innerHeight;
      // 全ての動画ラッパーに対して処理を繰り返す
      for (let i = 0; i < videoWrappers.length; i++) {
        // 動画の位置を取得
        const videoPosition =
          videoWrappers[i].getBoundingClientRect().top + window.pageYOffset;
        // 動画が再生される位置までスクロールした場合、動画を再生する
        if (startPosition > videoPosition) {
          const video = videoWrappers[i].getElementsByTagName("video");
          video[0].play();
        }
      }
    }
    // クラス名が"js-video"である要素を取得
    const videoWrappers = document.getElementsByClassName("js-video");
    // クラス名が"js-video"である要素が存在する場合
    if (videoWrappers.length) {
      // 動画を再生する関数を実行
      playVideos(videoWrappers);
      // スクロール時に動画を再生する関数を実行するリスナーを設定
      window.addEventListener(
        "scroll",
        function () {
          playVideos(videoWrappers);
        },
        false
      );
    }
  },
  false
);
!
999px

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