#011 Text

Neon Sign Effect

点滅するネオンサインエフェクト。
レトロな雰囲気の光るテキストアニメーションです。

Demo

HTML index.html 

<!DOCTYPE html>
<html lang="ja">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Neon Sign</title>
  <link rel="stylesheet" href="style.css">
</head>
<body>
  <div class="neon-sign">
    <span class="neon-text">NEON</span>
    <span class="neon-text">LIGHTS</span>
  </div>
  <script src="script.js"></script>
</body>
</html>

CSS style.css 

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #000;
  font-family: 'Arial', sans-serif;
}

.neon-sign {
  text-align: center;
}

.neon-text {
  display: block;
  font-size: 8rem;
  font-weight: bold;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  text-shadow:
    0 0 10px #fff,
    0 0 20px #fff,
    0 0 30px #fff,
    0 0 40px #ff00de,
    0 0 70px #ff00de,
    0 0 80px #ff00de,
    0 0 100px #ff00de,
    0 0 150px #ff00de;
  animation: flicker 3s infinite alternate;
}

.neon-text:nth-child(2) {
  color: #00d9ff;
  text-shadow:
    0 0 10px #fff,
    0 0 20px #fff,
    0 0 30px #fff,
    0 0 40px #00d9ff,
    0 0 70px #00d9ff,
    0 0 80px #00d9ff,
    0 0 100px #00d9ff,
    0 0 150px #00d9ff;
  animation-delay: 0.3s;
}

@keyframes flicker {
  0%, 18%, 22%, 25%, 53%, 57%, 100% {
    opacity: 1;
  }
  20%, 24%, 55% {
    opacity: 0.4;
  }
}

.neon-text:hover {
  animation: pulse 0.5s ease-in-out;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

@media (max-width: 768px) {
  .neon-text {
    font-size: 4rem;
  }
}

JS script.js 

// クリックで点滅パターン変更
const neonTexts = document.querySelectorAll('.neon-text');

document.querySelector('.neon-sign').addEventListener('click', () => {
  neonTexts.forEach(text => {
    text.style.animation = 'none';
    setTimeout(() => {
      const randomDuration = 1 + Math.random() * 3;
      text.style.animation = `flicker ${randomDuration}s infinite alternate`;
    }, 10);
  });
});

Download

すべてのファイルをZIP形式でダウンロードできます。