sanbuphy
0eba9e87e9
- Disable formatting rules (handled by Prettier) - Relaxed strict Vue/JS rules for demo code compatibility - Fix syntax errors in ApiPlayground and VoiceCloningDemo - Fix duplicate else-if condition in ApiPlayground - Fix Promise executor async pattern in AutoregressiveAudioDemo - Add TypeScript file support to ESLint config Warnings reduced from 295 to 251 problems. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
522 lines
12 KiB
Vue
522 lines
12 KiB
Vue
<!--
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ReflowRepaintDemo.vue
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重排与重绘演示
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-->
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<template>
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<div class="reflow-demo">
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<div class="demo-header">
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<span class="icon">⚡</span>
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<span class="title">重排与重绘</span>
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<span class="subtitle">观察不同操作对性能的影响</span>
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</div>
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<div class="tabs">
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<button
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v-for="tab in tabs"
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:key="tab.id"
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class="tab-btn"
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:class="{ active: activeTab === tab.id }"
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@click="activeTab = tab.id"
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>
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<span class="tab-icon">{{ tab.icon }}</span>
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<span class="tab-label">{{ tab.label }}</span>
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</button>
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</div>
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<div class="demo-area">
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<div class="canvas-area">
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<div class="box-container">
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<div
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v-for="box in boxes"
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:key="box.id"
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class="box"
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:style="getBoxStyle(box)"
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>
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{{ box.id }}
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</div>
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</div>
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<div class="performance-meter">
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<div class="meter-label">
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性能影响
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</div>
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<div class="meter-bar">
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<div
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class="meter-fill"
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:class="performanceLevel.class"
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:style="{ width: performanceImpact + '%' }"
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/>
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</div>
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<div
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class="meter-value"
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:class="performanceLevel.class"
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>
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{{ performanceLevel.text }}
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</div>
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</div>
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<div class="stats">
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<div class="stat-item">
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<div class="stat-label">
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操作类型
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</div>
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<div class="stat-value">
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{{ currentOperation }}
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</div>
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</div>
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<div class="stat-item">
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<div class="stat-label">
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影响范围
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</div>
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<div class="stat-value">
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{{ affectedElements }} 个元素
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</div>
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</div>
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</div>
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</div>
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<div class="controls">
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<div
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v-if="activeTab === 'reflow'"
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class="control-group"
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>
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<button
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class="btn high-impact"
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@click="changeWidth"
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>
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改变宽度
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</button>
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<button
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class="btn high-impact"
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@click="changePosition"
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>
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改变位置
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</button>
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<button
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class="btn high-impact"
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@click="addBox"
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>
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添加元素
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</button>
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</div>
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<div
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v-if="activeTab === 'repaint'"
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class="control-group"
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>
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<button
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class="btn medium-impact"
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@click="changeColor"
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>
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改变颜色
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</button>
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<button
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class="btn medium-impact"
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@click="changeBackground"
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>
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改变背景
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</button>
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<button
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class="btn medium-impact"
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@click="toggleBorder"
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>
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切换边框
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</button>
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</div>
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<div
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v-if="activeTab === 'composite'"
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class="control-group"
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>
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<button
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class="btn low-impact"
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@click="transformTranslate"
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>
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Transform 位移
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</button>
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<button
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class="btn low-impact"
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@click="transformRotate"
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>
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Transform 旋转
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</button>
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<button
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class="btn low-impact"
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@click="changeOpacity"
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>
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改变透明度
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</button>
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</div>
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</div>
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</div>
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<Transition name="fade">
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<div
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v-if="activeTab"
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class="tab-info"
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>
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<div
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v-if="activeTab === 'reflow'"
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class="info-content"
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>
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<p>
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<strong>重排 (Reflow)</strong>：当元素的位置、尺寸发生变化时，浏览器需要重新计算布局。重排开销最大，因为要重新计算所有受影响元素的位置。
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</p>
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</div>
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<div
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v-if="activeTab === 'repaint'"
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class="info-content"
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>
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<p>
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<strong>重绘 (Repaint)</strong>：当元素的外观（颜色、背景）发生变化，但位置不变时，浏览器只需要重新绘制像素。比重排快，但仍有开销。
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</p>
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</div>
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<div
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v-if="activeTab === 'composite'"
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class="info-content"
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>
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<p>
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<strong>合成 (Composite)</strong>：使用 transform 和 opacity 等属性，浏览器可以在合成层上完成变化，完全不触发布局和绘制。性能最佳，推荐优先使用。
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</p>
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</div>
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</div>
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</Transition>
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<div class="info-box">
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<span class="icon">💡</span>
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<strong>性能优化原则：</strong>优先使用 transform 和 opacity 进行动画，避免频繁触发布局计算（如 width、height、top、left），可以大幅提升页面性能。
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</div>
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</div>
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</template>
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<script setup>
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import { ref, computed } from 'vue'
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const activeTab = ref('reflow')
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const tabs = [
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{ id: 'reflow', icon: '🔴', label: '重排' },
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{ id: 'repaint', icon: '🟡', label: '重绘' },
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{ id: 'composite', icon: '🟢', label: '合成' }
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]
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const boxes = ref([
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{ id: 1, x: 20, y: 20, width: 80, height: 80, bg: 'var(--vp-c-brand-1)', rotation: 0, opacity: 1 },
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{ id: 2, x: 120, y: 20, width: 80, height: 80, bg: 'var(--vp-c-brand-2)', rotation: 0, opacity: 1 },
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{ id: 3, x: 20, y: 120, width: 80, height: 80, bg: 'var(--vp-c-brand-3)', rotation: 0, opacity: 1 }
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])
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const currentOperation = ref('无')
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const performanceImpact = ref(0)
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const affectedElements = ref(0)
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const performanceLevel = computed(() => {
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if (performanceImpact.value <= 33) return { class: 'good', text: '低' }
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if (performanceImpact.value <= 66) return { class: 'medium', text: '中' }
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return { class: 'high', text: '高' }
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})
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function getBoxStyle(box) {
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return {
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left: box.x + 'px',
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top: box.y + 'px',
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width: box.width + 'px',
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height: box.height + 'px',
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backgroundColor: box.bg,
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transform: `rotate(${box.rotation}deg)`,
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opacity: box.opacity
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}
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}
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function updateMetrics(operation, impact, affected) {
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currentOperation.value = operation
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performanceImpact.value = impact
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affectedElements.value = affected
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}
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function changeWidth() {
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boxes.value.forEach((box) => { box.width = 60 + Math.random() * 60 })
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updateMetrics('改变宽度', 90, boxes.value.length)
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}
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function changePosition() {
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boxes.value.forEach((box) => {
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box.x = Math.random() * 150
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box.y = Math.random() * 150
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})
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updateMetrics('改变位置', 85, boxes.value.length)
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}
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function addBox() {
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const newId = boxes.value.length + 1
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boxes.value.push({
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id: newId,
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x: Math.random() * 100,
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y: Math.random() * 100,
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width: 80,
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height: 80,
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bg: 'var(--vp-c-brand)',
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rotation: 0,
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opacity: 1
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})
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updateMetrics('添加元素', 95, boxes.value.length)
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}
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function changeColor() {
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const colors = ['var(--vp-c-brand-1)', 'var(--vp-c-brand-2)', 'var(--vp-c-brand-3)']
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boxes.value.forEach((box) => { box.bg = colors[Math.floor(Math.random() * colors.length)] })
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updateMetrics('改变颜色', 50, boxes.value.length)
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}
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function changeBackground() {
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const bgs = ['var(--vp-c-brand-1)', 'var(--vp-c-brand-2)', 'var(--vp-c-brand-3)']
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boxes.value.forEach((box) => { box.bg = bgs[Math.floor(Math.random() * bgs.length)] })
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updateMetrics('改变背景', 45, boxes.value.length)
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}
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function toggleBorder() {
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updateMetrics('切换边框', 55, boxes.value.length)
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}
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function transformTranslate() {
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boxes.value.forEach((box) => { box.x += Math.random() * 20 - 10 })
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updateMetrics('Transform 位移', 10, boxes.value.length)
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}
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function transformRotate() {
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boxes.value.forEach((box) => { box.rotation += Math.random() * 30 - 15 })
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updateMetrics('Transform 旋转', 10, boxes.value.length)
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}
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function changeOpacity() {
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boxes.value.forEach((box) => { box.opacity = 0.5 + Math.random() * 0.5 })
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updateMetrics('改变透明度', 10, boxes.value.length)
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}
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</script>
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<style scoped>
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.reflow-demo {
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border: 1px solid var(--vp-c-divider);
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border-radius: 6px;
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background: var(--vp-c-bg-soft);
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padding: 0.75rem;
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margin: 0.5rem 0;
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}
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.demo-header {
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display: flex;
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align-items: center;
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gap: 0.5rem;
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margin-bottom: 0.75rem;
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}
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.demo-header .icon { font-size: 1.25rem; }
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.demo-header .title { font-weight: bold; font-size: 1rem; }
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.demo-header .subtitle { color: var(--vp-c-text-2); font-size: 0.85rem; margin-left: 0.5rem; }
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.tabs {
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display: flex;
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gap: 0.5rem;
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margin-bottom: 1rem;
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}
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.tab-btn {
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display: flex;
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align-items: center;
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gap: 0.35rem;
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padding: 0.5rem 0.75rem;
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border: 1px solid var(--vp-c-divider);
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background: var(--vp-c-bg);
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border-radius: 6px;
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cursor: pointer;
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font-size: 0.85rem;
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transition: all 0.2s ease;
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}
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.tab-btn:hover {
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background: var(--vp-c-bg-soft);
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}
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.tab-btn.active {
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background: var(--vp-c-brand);
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color: var(--vp-c-bg-inverse);
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border-color: var(--vp-c-brand);
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}
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.tab-icon { font-size: 1rem; }
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.tab-label { font-weight: 500; }
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.demo-area {
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display: grid;
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grid-template-columns: 1fr 200px;
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gap: 1rem;
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}
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@media (max-width: 768px) {
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.demo-area { grid-template-columns: 1fr; }
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}
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.canvas-area {
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background: var(--vp-c-bg);
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border: 1px solid var(--vp-c-divider);
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border-radius: 6px;
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padding: 0.75rem;
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}
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.box-container {
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position: relative;
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height: 200px;
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margin-bottom: 1rem;
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border: 2px dashed var(--vp-c-divider);
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border-radius: 6px;
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}
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.box {
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position: absolute;
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display: flex;
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align-items: center;
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justify-content: center;
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font-weight: 700;
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font-size: 1.1rem;
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color: var(--vp-c-bg-inverse);
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border-radius: 6px;
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transition: all 0.3s ease;
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user-select: none;
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}
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.performance-meter {
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margin-bottom: 0.75rem;
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}
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.meter-label {
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font-size: 0.8rem;
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color: var(--vp-c-text-2);
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margin-bottom: 0.35rem;
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}
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.meter-bar {
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height: 10px;
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background: var(--vp-c-bg-soft);
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border-radius: 5px;
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overflow: hidden;
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margin-bottom: 0.35rem;
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}
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.meter-fill {
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height: 100%;
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transition: all 0.5s ease;
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border-radius: 5px;
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}
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.meter-fill.good { background: var(--vp-c-success-1); }
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.meter-fill.medium { background: var(--vp-c-warning-1); }
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.meter-fill.high { background: var(--vp-c-error-1); }
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.meter-value {
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font-size: 0.85rem;
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font-weight: 600;
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text-align: right;
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}
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.meter-value.good { color: var(--vp-c-success-1); }
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.meter-value.medium { color: var(--vp-c-warning-1); }
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.meter-value.high { color: var(--vp-c-error-1); }
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.stats {
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display: flex;
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gap: 0.75rem;
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}
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.stat-item {
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flex: 1;
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background: var(--vp-c-bg-soft);
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border-radius: 6px;
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padding: 0.6rem;
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text-align: center;
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}
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.stat-label {
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font-size: 0.7rem;
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color: var(--vp-c-text-2);
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margin-bottom: 0.25rem;
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}
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.stat-value {
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font-size: 0.85rem;
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font-weight: 600;
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color: var(--vp-c-text-1);
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}
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.controls {
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display: flex;
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flex-direction: column;
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gap: 0.5rem;
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}
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.control-group {
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display: flex;
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flex-direction: column;
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gap: 0.5rem;
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}
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.btn {
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padding: 0.6rem;
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border: none;
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border-radius: 6px;
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font-size: 0.85rem;
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font-weight: 500;
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cursor: pointer;
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transition: all 0.2s;
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color: var(--vp-c-bg-inverse);
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}
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.btn.high-impact { background: var(--vp-c-error-1); }
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.btn.high-impact:hover { opacity: 0.9; }
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.btn.medium-impact { background: var(--vp-c-warning-1); }
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.btn.medium-impact:hover { opacity: 0.9; }
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.btn.low-impact { background: var(--vp-c-success-1); }
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.btn.low-impact:hover { opacity: 0.9; }
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.tab-info {
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background: var(--vp-c-bg);
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border-radius: 6px;
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padding: 0.75rem;
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margin-top: 0.75rem;
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border: 1px solid var(--vp-c-divider);
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}
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.info-content {
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font-size: 0.85rem;
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color: var(--vp-c-text-2);
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line-height: 1.6;
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}
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.info-content strong {
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color: var(--vp-c-text-1);
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}
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.fade-enter-active,
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.fade-leave-active {
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transition: opacity 0.2s ease, transform 0.2s ease;
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}
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.fade-enter-from,
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.fade-leave-to {
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opacity: 0;
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transform: translateY(-10px);
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}
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.info-box {
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background: var(--vp-c-bg-alt);
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padding: 0.75rem;
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border-radius: 6px;
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font-size: 0.85rem;
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color: var(--vp-c-text-2);
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margin-top: 0.75rem;
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}
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.info-box .icon { margin-right: 0.25rem; }
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</style>
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