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>CSS Variables - Animal.js</title>
    <link rel="stylesheet" href="../demo.css">
    <style>
        :root {
            --box-width: 50px;
        }
        .box {
            width: var(--box-width);
            height: 50px;
            background-color: var(--highlight-color);
            border-radius: 4px;
        }
        .demo-visual { padding: 40px; display: flex; align-items: center; justify-content: center; }
    </style>
</head>
<body>
    <div class="container">
        <div style="font-size: 10px; font-weight: bold; letter-spacing: 1px; color: #ff4b4b; margin-bottom: 20px;">ANIMATION > ANIMATABLE PROPERTIES</div>
        <h1>CSS Variables</h1>
        <p class="description">Animate CSS variables directly.</p>
        <div class="box-container">
            <div class="box-header">
                <div class="box-title">CSS Var example</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>
            <div id="js-code" class="code-view active">
<span class="fun">xjs</span><span class="punc">(</span><span class="str">'.box'</span><span class="punc">)</span>.<span class="fun">animate</span><span class="punc">(</span><span class="punc">{</span>
  <span class="str">'--box-width'</span><span class="punc">:</span> <span class="str">'200px'</span><span class="punc">,</span>
  duration<span class="punc">:</span> <span class="num">1000</span><span class="punc">,</span>
  easing<span class="punc">:</span> <span class="str">'ease-in-out'</span>
<span class="punc">}</span><span class="punc">)</span><span class="punc">;</span>
            </div>
            <div id="html-code" class="html-view">
<span class="tag">&lt;div</span> <span class="attr">class</span>=<span class="val">"box"</span><span class="tag">&gt;&lt;/div&gt;</span>
            </div>
            <pre id="css-code" class="css-view">:root {
  --box-width: 50px;
}
.box {
  width: var(--box-width);
  height: 50px;
  background-color: var(--highlight-color);
  border-radius: 4px;
}
.demo-visual {
  padding: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}</pre>

            <div class="feature-desc">
                <strong>功能说明：</strong>把 CSS 自定义属性（变量）当作可动画属性，适合主题色、尺寸、间距等可配置样式的过渡。
            </div>
            <div class="demo-visual">
                <div class="box"></div>
            </div>
            <div class="action-bar">
                <button class="play-btn" onclick="runDemo()">REPLAY</button>
                <button class="play-btn secondary" onclick="pauseDemo()">PAUSE</button>
                <button class="play-btn secondary" onclick="resumeDemo()">RESUME</button>
            </div>
        </div>
    </div>
    <script src="../highlight_css.js"></script>
    <script src="../../xjs.js"></script>
    <script>
        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');
            }
        }

        let __demoControls = [];

        function runDemo() {
            const box = document.querySelector('.box');
            box.style.setProperty('--box-width', '50px');

            __demoControls = [];
            __demoControls.push(xjs('.box').animate({
                '--box-width': '200px',
                duration: 1000,
                easing: 'ease-in-out'
            }));
        }

        function pauseDemo() {
            __demoControls.forEach(c => { try { c?.pause?.(); } catch {} });
        }

        function resumeDemo() {
            __demoControls.forEach(c => {
                try {
                    if (typeof c?.resume === 'function') c.resume();
                    else if (typeof c?.play === 'function') c.play();
                } catch {}
            });
        }
        setTimeout(runDemo, 500);
    </script>
</body>
</html>