sanbuphy
132 lines
2.6 KiB
Vue
132 lines
2.6 KiB
Vue
<!--
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SliceRequestDemo.vue
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切图时代的请求数与加载时间演示
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-->
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<template>
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<div class="slice-demo">
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<div class="header">
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<div class="title">切图时代：请求数越多越慢</div>
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<div class="subtitle">调整切图数量，观察加载时间变化</div>
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</div>
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<div class="controls">
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<label>
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切图数量：<strong>{{ slices }}</strong> 张
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</label>
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<input v-model="slices" type="range" min="1" max="30" step="1" />
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<label class="toggle">
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<input v-model="useSprite" type="checkbox" />
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合并雪碧图 (Sprite)
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</label>
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</div>
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<div class="metrics">
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<div class="metric">
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<div class="label">总请求数</div>
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<div class="value">{{ totalRequests }}</div>
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</div>
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<div class="metric">
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<div class="label">预计加载时间</div>
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<div class="value">{{ loadTime }} ms</div>
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</div>
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</div>
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<div class="bar">
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<div class="progress" :style="{ width: barWidth + '%' }"></div>
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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 slices = ref(12)
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const useSprite = ref(false)
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const totalRequests = computed(() => {
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const sliceRequests = useSprite.value ? 1 : slices.value
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return sliceRequests + 2
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})
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const loadTime = computed(() => {
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const base = 120
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const perRequest = 45
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return Math.round(base + totalRequests.value * perRequest)
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})
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const barWidth = computed(() => Math.min(100, Math.round(loadTime.value / 20)))
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</script>
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<style scoped>
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.slice-demo {
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border: 1px solid var(--vp-c-divider);
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background: var(--vp-c-bg-soft);
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border-radius: 12px;
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padding: 1.5rem;
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margin: 1.5rem 0;
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font-family: var(--vp-font-family-base);
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}
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.header {
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margin-bottom: 1rem;
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}
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.title {
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font-weight: 700;
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font-size: 1.05rem;
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}
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.subtitle {
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color: var(--vp-c-text-2);
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font-size: 0.9rem;
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}
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.controls label {
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display: block;
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margin-bottom: 0.4rem;
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font-size: 0.9rem;
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}
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.controls input[type='range'] {
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width: 100%;
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margin-bottom: 0.6rem;
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}
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.toggle {
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font-size: 0.85rem;
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color: var(--vp-c-text-2);
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}
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.metrics {
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display: grid;
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grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
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gap: 1rem;
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margin-top: 1rem;
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}
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.metric .label {
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font-size: 0.85rem;
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color: var(--vp-c-text-2);
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}
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.metric .value {
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font-size: 1.2rem;
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font-weight: 700;
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margin-top: 0.2rem;
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}
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.bar {
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height: 10px;
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margin-top: 1rem;
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background: var(--vp-c-bg);
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border-radius: 999px;
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overflow: hidden;
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border: 1px solid var(--vp-c-divider);
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}
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.progress {
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height: 100%;
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background: linear-gradient(90deg, #f97316, #ef4444);
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}
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</style>
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