robert
/
xjs


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Layer 背景动画 - Animal.js</title>
  <link rel="stylesheet" href="../demo.css">
  <link rel="stylesheet" href="../../xjs.css">
  <style>
    /* Keep Layer above the doc UI */
    .layer-overlay { z-index: 99999; }
  </style>
  <style>
    .controls {
      display: flex;
      flex-wrap: wrap;
      gap: 10px 12px;
      align-items: center;
      font-size: 13px;
      color: #b7b7b7;
    }
    .controls label {
      display: inline-flex;
      gap: 8px;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }
    .controls input { accent-color: var(--highlight-color); }
    .row {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      align-items: center;
    }
    .btn {
      appearance: none;
      border: 1px solid rgba(255,255,255,0.12);
      background: rgba(255,255,255,0.04);
      color: #fff;
      border-radius: 999px;
      padding: 10px 14px;
      font-weight: 650;
      cursor: pointer;
      transition: border-color 0.15s ease, background 0.15s ease;
    }
    .btn:hover { border-color: rgba(255,255,255,0.22); background: rgba(255,255,255,0.06); }
    .demo-visual { padding: 22px 24px; }
    .hint { font-size: 12px; color: #8c8c8c; line-height: 1.5; margin-top: 10px; }
    .split { margin-top: 10px; width: 100%; height: 1px; background: rgba(255,255,255,0.08); }
  </style>
</head>
<body>
  <div class="container">
    <div class="page-top">
      <div class="crumb">UI › LAYER</div>
      <div class="since">BACKGROUND ANIMATION</div>
    </div>

    <h1>背景动画 / 背景图案</h1>
    <p class="description">
      使用 <code class="inline">background</code> 设置 <code class="inline">layer-popup</code> 的整体背景，
      支持三种形式：<code class="inline">svg(...)</code> / <code class="inline">url(...)</code> / <code class="inline">css(...)</code>。
      在 Steps 模式下，当背景不同会随内容左右切换；相同背景则保持不动，仅切换内容。
    </p>

    <div class="box-container">
      <div class="demo-visual">
        <div class="controls" style="margin-bottom: 14px;">
          <label><input id="optIcon" type="checkbox" checked> showIcon</label>
          <label><input id="optPopup" type="checkbox" checked> popupAnimation</label>
          <label><input id="optEsc" type="checkbox" checked> closeOnEsc</label>
        </div>
        <div class="row">
          <button class="btn" type="button" onclick="openSingle('svg')">SVG 背景</button>
          <button class="btn" type="button" onclick="openSingle('image')">图片背景</button>
          <button class="btn" type="button" onclick="openSingle('css')">CSS 背景</button>
        </div>
        <div class="row" style="margin-top: 12px;">
          <button class="btn" type="button" onclick="openSingle('svg', 'compact')">SVG + 紧凑尺寸</button>
          <button class="btn" type="button" onclick="openSingle('image', 'wide')">图片 + 宽屏尺寸</button>
          <button class="btn" type="button" onclick="openSingle('css', 'tall')">CSS + 高屏尺寸</button>
        </div>
        <div class="split"></div>
        <div class="row" style="margin-top: 12px;">
          <button class="btn" type="button" onclick="openSteps('same')">Steps（相同背景）</button>
          <button class="btn" type="button" onclick="openSteps('diff')">Steps（不同背景）</button>
        </div>
        <div class="hint">
          Tip: Lottie 背景从 <code class="inline">/svg</code> 目录读取 JSON，示例为 <code class="inline">svg(BallSorting.json)</code>。
        </div>
      </div>

      <div class="box-header">
        <div class="box-title">Controls</div>
        <div class="tabs">
          <div class="tab active" onclick="switchTab('js')">JavaScript</div>
          <div class="tab" onclick="switchTab('html')">HTML</div>
          <div class="tab" onclick="switchTab('css')">CSS</div>
        </div>
      </div>

      <pre id="js-code" class="code-view active">const BACKGROUNDS = {
  svg: 'svg(BallSorting.json)',
  image: 'url("https://images.unsplash.com/photo-1500530855697-b586d89ba3ee?auto=format&amp;fit=crop&amp;w=900&amp;q=60")',
  css: 'css(background: linear-gradient(135deg, rgba(255,255,255,0.15), rgba(0,0,0,0.25)); filter: saturate(1.2))'
};

const SIZE_PRESETS = {
  normal: null,
  compact: { width: 340, height: 220 },
  wide: { width: '60vw', height: 260 },
  tall: { width: 360, height: '60vh' }
};

function openSingle(type, sizeKey) {
  const showIcon = !!document.getElementById('optIcon')?.checked;
  const popupAnimation = !!document.getElementById('optPopup')?.checked;
  const closeOnEsc = !!document.getElementById('optEsc')?.checked;
  const size = SIZE_PRESETS[sizeKey] || null;

  $.layer({
    title: 'Background: ' + type.toUpperCase(),
    text: 'Layer popup background demo.',
    background: BACKGROUNDS[type],
    width: size ? size.width : null,
    height: size ? size.height : null,
    icon: showIcon ? 'svg:BallSorting' : null,
    popupAnimation,
    closeOnEsc
  });
}

function openSteps(mode) {
  const showIcon = !!document.getElementById('optIcon')?.checked;
  const popupAnimation = !!document.getElementById('optPopup')?.checked;
  const closeOnEsc = !!document.getElementById('optEsc')?.checked;

  const same = BACKGROUNDS.svg;
  const a = BACKGROUNDS.svg;
  const b = BACKGROUNDS.image;

  $.layer({
    title: 'Step 1',
    text: 'Background should follow when different.',
    background: mode === 'same' ? same : a,
    icon: showIcon ? 'info' : null,
    popupAnimation,
    closeOnEsc,
    showCancelButton: true
  })
  .step({
    title: 'Step 2',
    text: 'Swipe left/right to see background transition.',
    background: mode === 'same' ? same : b
  })
  .step({
    title: 'Step 3',
    text: 'Back to the first background.',
    background: mode === 'same' ? same : a
  })
  .run();
}</pre>

      <pre id="html-code" class="html-view">&lt;div class="demo-visual"&gt;
  &lt;div class="controls" style="margin-bottom: 14px;"&gt;
    &lt;label&gt;&lt;input id="optIcon" type="checkbox" checked&gt; showIcon&lt;/label&gt;
    &lt;label&gt;&lt;input id="optPopup" type="checkbox" checked&gt; popupAnimation&lt;/label&gt;
    &lt;label&gt;&lt;input id="optEsc" type="checkbox" checked&gt; closeOnEsc&lt;/label&gt;
  &lt;/div&gt;
  &lt;div class="row"&gt;
    &lt;button class="btn" type="button" onclick="openSingle('svg')"&gt;SVG 背景&lt;/button&gt;
    &lt;button class="btn" type="button" onclick="openSingle('image')"&gt;图片背景&lt;/button&gt;
    &lt;button class="btn" type="button" onclick="openSingle('css')"&gt;CSS 背景&lt;/button&gt;
  &lt;/div&gt;
  &lt;div class="row" style="margin-top: 12px;"&gt;
    &lt;button class="btn" type="button" onclick="openSingle('svg', 'compact')"&gt;SVG + 紧凑尺寸&lt;/button&gt;
    &lt;button class="btn" type="button" onclick="openSingle('image', 'wide')"&gt;图片 + 宽屏尺寸&lt;/button&gt;
    &lt;button class="btn" type="button" onclick="openSingle('css', 'tall')"&gt;CSS + 高屏尺寸&lt;/button&gt;
  &lt;/div&gt;
  &lt;div class="split"&gt;&lt;/div&gt;
  &lt;div class="row" style="margin-top: 12px;"&gt;
    &lt;button class="btn" type="button" onclick="openSteps('same')"&gt;Steps（相同背景）&lt;/button&gt;
    &lt;button class="btn" type="button" onclick="openSteps('diff')"&gt;Steps（不同背景）&lt;/button&gt;
  &lt;/div&gt;
&lt;/div&gt;</pre>

      <pre id="css-code" class="css-view">/* Keep Layer above the doc UI */
.layer-overlay { z-index: 99999; }

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  align-items: center;
  font-size: 13px;
  color: #b7b7b7;
}
.controls label {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  cursor: pointer;
  user-select: none;
}
.controls input { accent-color: var(--highlight-color); }
.row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}
.btn {
  appearance: none;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.04);
  color: #fff;
  border-radius: 999px;
  padding: 10px 14px;
  font-weight: 650;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.btn:hover { border-color: rgba(255,255,255,0.22); background: rgba(255,255,255,0.06); }
.demo-visual { padding: 22px 24px; }
.hint { font-size: 12px; color: #8c8c8c; line-height: 1.5; margin-top: 10px; }
.split { margin-top: 10px; width: 100%; height: 1px; background: rgba(255,255,255,0.08); }</pre>

      <div class="feature-desc">
        <strong>功能说明：</strong>本页验证 Layer 的 <code class="inline">background</code> 支持
        Lottie SVG / 图片 / CSS 三种形式，并在 Steps 中按方向切换背景。
      </div>
    </div>

    <div class="doc-nav" aria-label="Previous and next navigation">
      <a href="#" id="prevLink" onclick="goPrev(); return false;">
        <span><span class="nav-label">Previous</span><br><span class="nav-title" id="prevTitle">—</span></span>
        <span aria-hidden="true">←</span>
      </a>
      <div class="nav-center" id="navCenter">Layer</div>
      <a href="#" id="nextLink" onclick="goNext(); return false;">
        <span><span class="nav-label">Next</span><br><span class="nav-title" id="nextTitle">—</span></span>
        <span aria-hidden="true">→</span>
      </a>
    </div>
  </div>

  <script src="../highlight_css.js"></script>
  <!-- Dev/test: load source files directly with cache-bust (avoid stale iframe cache) -->
  <script>
    (function () {
      var b = Date.now();
      document.write('<script src="../../animal.js?_=' + b + '"><\/script>');
      document.write('<script src="../../layer.js?_=' + b + '"><\/script>');
      document.write('<script>try{if(window.animal&&!window.xjs)window.xjs=window.animal;}catch(e){}<\/script>');
    })();
  </script>
  <script>
    const CURRENT = 'layer/test_custom_animation_background.html';
    const BACKGROUNDS = {
      svg: 'svg(BallSorting.json)',
      image: 'url("https://images.unsplash.com/photo-1500530855697-b586d89ba3ee?auto=format&fit=crop&w=900&q=60")',
      css: 'css(background: linear-gradient(135deg, rgba(255,255,255,0.15), rgba(0,0,0,0.25)); filter: saturate(1.2))'
    };
    const SIZE_PRESETS = {
      normal: null,
      compact: { width: 340, height: 220 },
      wide: { width: '60vw', height: 260 },
      tall: { width: 360, height: '60vh' }
    };

    function switchTab(tab) {
      document.querySelectorAll('.tab').forEach(t => t.classList.remove('active'));
      document.querySelectorAll('.code-view, .html-view, .css-view').forEach(v => v.classList.remove('active'));
      if (tab === 'js') {
        document.querySelector('.tabs .tab:nth-child(1)')?.classList.add('active');
        document.getElementById('js-code')?.classList.add('active');
      } else if (tab === 'html') {
        document.querySelector('.tabs .tab:nth-child(2)')?.classList.add('active');
        document.getElementById('html-code')?.classList.add('active');
      } else {
        document.querySelector('.tabs .tab:nth-child(3)')?.classList.add('active');
        document.getElementById('css-code')?.classList.add('active');
      }
    }

    function setJsCode(code) {
      const jsPre = document.getElementById('js-code');
      if (!jsPre) return;
      jsPre.textContent = code;
      try { delete jsPre.dataset.highlighted; } catch {}
      try { jsPre.dataset.highlighted = '0'; } catch {}
      if (typeof window.__highlightCssViews === 'function') {
        window.__highlightCssViews();
      }
    }

    function openSingle(type, sizeKey) {
      if (typeof window.$ !== 'function') return;
      const showIcon = !!document.getElementById('optIcon')?.checked;
      const popupAnimation = !!document.getElementById('optPopup')?.checked;
      const closeOnEsc = !!document.getElementById('optEsc')?.checked;
      const size = SIZE_PRESETS[sizeKey] || null;

      const code = `$.layer({
  title: 'Background: ${type.toUpperCase()}',
  text: 'Layer popup background demo.',
  background: '${BACKGROUNDS[type]}',
  width: ${size ? JSON.stringify(size.width) : 'null'},
  height: ${size ? JSON.stringify(size.height) : 'null'},
  icon: ${showIcon ? "'svg:BallSorting'" : 'null'},
  popupAnimation: ${popupAnimation},
  closeOnEsc: ${closeOnEsc}
});`;
      setJsCode(code);

      $.layer({
        title: 'Background: ' + type.toUpperCase(),
        text: 'Layer popup background demo.',
        background: BACKGROUNDS[type],
        width: size ? size.width : null,
        height: size ? size.height : null,
        icon: showIcon ? 'svg:BallSorting' : null,
        popupAnimation,
        closeOnEsc
      });
    }

    function openSteps(mode) {
      if (typeof window.$ !== 'function') return;
      const showIcon = !!document.getElementById('optIcon')?.checked;
      const popupAnimation = !!document.getElementById('optPopup')?.checked;
      const closeOnEsc = !!document.getElementById('optEsc')?.checked;

      const same = BACKGROUNDS.svg;
      const a = BACKGROUNDS.svg;
      const b = BACKGROUNDS.image;

      const code = `$.layer({
  title: 'Step 1',
  text: 'Background should follow when different.',
  background: ${mode === 'same' ? 'same' : 'a'},
  icon: ${showIcon ? "'info'" : 'null'},
  popupAnimation: ${popupAnimation},
  closeOnEsc: ${closeOnEsc},
  showCancelButton: true
})
.step({
  title: 'Step 2',
  text: 'Swipe left/right to see background transition.',
  background: ${mode === 'same' ? 'same' : 'b'}
})
.step({
  title: 'Step 3',
  text: 'Back to the first background.',
  background: ${mode === 'same' ? 'same' : 'a'}
})
.run();`;
      setJsCode(code.replace(/\b(same|a|b)\b/g, (m) => {
        if (m === 'same') return `'${same}'`;
        if (m === 'a') return `'${a}'`;
        return `'${b}'`;
      }));

      $.layer({
        title: 'Step 1',
        text: 'Background should follow when different.',
        background: mode === 'same' ? same : a,
        icon: showIcon ? 'info' : null,
        popupAnimation,
        closeOnEsc,
        showCancelButton: true
      })
      .step({
        title: 'Step 2',
        text: 'Swipe left/right to see background transition.',
        background: mode === 'same' ? same : b
      })
      .step({
        title: 'Step 3',
        text: 'Back to the first background.',
        background: mode === 'same' ? same : a
      })
      .run();
    }

    function goPrev() { window.parent?.docNavigatePrev?.(CURRENT); }
    function goNext() { window.parent?.docNavigateNext?.(CURRENT); }

    function syncNavLabels() {
      const api = window.parent?.docGetPrevNext;
      if (typeof api !== 'function') return;
      const { prev, next, current } = api(CURRENT) || {};
      const prevLink = document.getElementById('prevLink');
      const nextLink = document.getElementById('nextLink');
      if (prev) document.getElementById('prevTitle').textContent = prev.title || prev.url;
      else { prevLink.style.visibility = 'hidden'; }
      if (next) document.getElementById('nextTitle').textContent = next.title || next.url;
      else { nextLink.style.visibility = 'hidden'; }
      document.getElementById('navCenter').textContent = (current && current.group) ? current.group : 'Layer';
    }

    try { window.parent?.setMiddleActive?.(CURRENT); } catch {}
    syncNavLabels();
  </script>
</body>
</html>