robert
/
xjs


			
				
					
						
						
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104
							<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>SVG Mask Reveal - Animal.js</title>
  <link rel="stylesheet" href="../demo.css">
  <style>
    .demo-visual {
      padding: 26px 30px;
      background: #151515;
      display: grid;
      grid-template-columns: 1fr 280px;
      gap: 16px;
    }
    .stage {
      background: #000;
      border: 1px solid #262626;
      border-radius: 12px;
      padding: 0;
      overflow: hidden;
      min-height: 240px;
      display: grid;
      place-items: center;
      position: relative;
    }
    .panel {
      background: rgba(0,0,0,0.18);
      border: 1px solid #262626;
      border-radius: 12px;
      padding: 14px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    svg { width: 100%; height: 100%; position: absolute; top:0; left:0; }
    
    .bg-image {
      width: 100%; height: 100%;
      object-fit: cover;
      opacity: 0.5;
    }
    .reveal-text {
      fill: #fff;
      font-size: 40px;
      font-weight: 900;
      text-anchor: middle;
      letter-spacing: 4px;
    }
  </style>
</head>
<body>
  <div class="container">
    <div class="page-top">
      <div class="crumb">ANIMATION › SVG</div>
      <div class="since">SINCE 1.0.0</div>
    </div>

    <h1>SVG Mask Reveal</h1>
    <p class="description">使用 SVG <code class="inline">&lt;mask&gt;</code> 制作遮罩动画。可以控制遮罩内的图形形状、位置、大小来揭示内容。</p>

    <div class="box-container">
      <div class="demo-visual">
        <div class="stage">
          <img src="https://images.unsplash.com/photo-1492144534655-ae79c964c9d7?auto=format&fit=crop&w=800&q=80" class="bg-image" alt="Background">
          
          <svg viewBox="0 0 400 300" preserveAspectRatio="xMidYMid slice">
            <defs>
              <mask id="myMask">
                <rect width="100%" height="100%" fill="white" />
                <circle id="maskCircle" cx="200" cy="150" r="0" fill="black" />
              </mask>
            </defs>
            <rect width="100%" height="100%" fill="black" mask="url(#myMask)" opacity="0.8" />
            <text x="200" y="165" class="reveal-text" mask="url(#myMask)">REVEAL</text>
          </svg>
        </div>
        <div class="panel">
           <button class="play-btn" onclick="runDemo()">REPLAY</button>
        </div>
      </div>
    </div>

    <script src="../page_utils.js"></script>
    <script src="../../xjs.js"></script>
    <script>
      function runDemo() {
        // Reset
        xjs('#maskCircle').animate({ r: 0, duration: 0 });
        
        // Animate radius to reveal
        xjs('#maskCircle').animate({
          r: [0, 300],
          duration: 2000,
          easing: 'ease-in-out',
          direction: 'alternate',
          loop: true
        });
      }
      setTimeout(runDemo, 320);
    </script>
  </div>
</body>
</html>