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feat: update docs and components, fix DLQ demo bug

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sanbuphy
2026-01-18 12:21:49 +08:00
parent 26ed39e1eb
commit e41063a1cd
159 changed files with 54236 additions and 2525 deletions
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docs/.vitepress/theme/components/appendix/frontend-performance/ReflowRepaintDemo.vue
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<!--
ReflowRepaintDemo.vue
重排与重绘演示
-->
<template>
<div class="reflow-demo">
<div class="header">
<div class="title">重排与重绘对比</div>
<div class="subtitle">观察不同操作对性能的影响</div>
</div>
<div class="demo-container">
<div class="canvas-area">
<div class="box-container">
<div
v-for="box in boxes"
:key="box.id"
class="box"
:class="box.selected ? 'selected' : ''"
:style="getBoxStyle(box)"
@click="selectBox(box.id)"
>
{{ box.id }}
</div>
</div>
<div class="performance-meter">
<div class="meter-label">性能影响</div>
<div class="meter-bar">
<div class="meter-fill" :class="performanceLevel.class" :style="{ width: performanceImpact + '%' }"></div>
</div>
<div class="meter-value" :class="performanceLevel.class">
{{ performanceLevel.text }}
</div>
</div>
<div class="stats">
<div class="stat-item">
<div class="stat-label">操作类型</div>
<div class="stat-value">{{ currentOperation }}</div>
</div>
<div class="stat-item">
<div class="stat-label">影响范围</div>
<div class="stat-value">{{ affectedElements }} 个元素</div>
</div>
</div>
</div>
<div class="controls">
<div class="control-section">
<h4>重排操作 (Reflow)</h4>
<p class="control-desc">改变元素尺寸或位置，触发布局计算</p>
<button @click="changeWidth" class="btn reflow">改变宽度</button>
<button @click="changePosition" class="btn reflow">改变位置</button>
<button @click="addBox" class="btn reflow">添加元素</button>
</div>
<div class="control-section">
<h4>重绘操作 (Repaint)</h4>
<p class="control-desc">只改变外观，不触发布局</p>
<button @click="changeColor" class="btn repaint">改变颜色</button>
<button @click="changeBackground" class="btn repaint">改变背景</button>
<button @click="toggleBorder" class="btn repaint">切换边框</button>
</div>
<div class="control-section">
<h4>合成操作 (Composite)</h4>
<p class="control-desc">只触发合成，性能最佳</p>
<button @click="transformTranslate" class="btn composite">Transform 位移</button>
<button @click="transformRotate" class="btn composite">Transform 旋转</button>
<button @click="changeOpacity" class="btn composite">改变透明度</button>
</div>
</div>
</div>
<div class="info-section">
<div class="info-card">
<h4>什么是重排 (Reflow)？</h4>
<p>当元素的位置、尺寸发生变化时，浏览器需要重新计算布局，这个过程叫重排。重排开销最大，因为要重新计算所有受影响元素的位置。</p>
</div>
<div class="info-card">
<h4>什么是重绘 (Repaint)？</h4>
<p>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，这个过程叫重绘。比重排快，但仍有开销。</p>
</div>
<div class="info-card">
<h4>什么是合成 (Composite)？</h4>
<p>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。</p>
</div>
</div>
</div>
</template>
<script setup>
import { ref, computed } from 'vue'
const boxes = ref([
{ id: 1, x: 0, y: 0, width: 80, height: 80, color: '#3b82f6', bg: '#dbeafe', rotation: 0, opacity: 1, border: false, selected: false },
{ id: 2, x: 100, y: 0, width: 80, height: 80, color: '#8b5cf6', bg: '#ede9fe', rotation: 0, opacity: 1, border: false, selected: false },
{ id: 3, x: 0, y: 100, width: 80, height: 80, color: '#ec4899', bg: '#fce7f3', rotation: 0, opacity: 1, border: false, selected: false }
])
const currentOperation = ref('无')
const performanceImpact = ref(0)
const affectedElements = ref(0)
const performanceLevel = computed(() => {
if (performanceImpact.value <= 33) {
return { class: 'good', text: '低' }
} else if (performanceImpact.value <= 66) {
return { class: 'medium', text: '中' }
} else {
return { class: 'high', text: '高' }
}
})
function getBoxStyle(box) {
return {
left: box.x + 'px',
top: box.y + 'px',
width: box.width + 'px',
height: box.height + 'px',
backgroundColor: box.bg,
borderColor: box.color,
borderWidth: box.border ? '3px' : '0px',
color: box.color,
transform: `rotate(${box.rotation}deg)`,
opacity: box.opacity
}
}
function selectBox(id) {
boxes.value.forEach(b => b.selected = b.id === id)
}
function updateMetrics(operation, impact, affected) {
currentOperation.value = operation
performanceImpact.value = impact
affectedElements.value = affected
}
function changeWidth() {
boxes.value.forEach(box => {
box.width = 60 + Math.random() * 60
})
updateMetrics('改变宽度', 90, boxes.value.length)
}
function changePosition() {
boxes.value.forEach(box => {
box.x = Math.random() * 150
box.y = Math.random() * 150
})
updateMetrics('改变位置', 85, boxes.value.length)
}
function addBox() {
const newId = boxes.value.length + 1
boxes.value.push({
id: newId,
x: Math.random() * 100,
y: Math.random() * 100,
width: 80,
height: 80,
color: '#10b981',
bg: '#d1fae5',
rotation: 0,
opacity: 1,
border: false,
selected: false
})
updateMetrics('添加元素', 95, boxes.value.length)
}
function changeColor() {
const colors = ['#3b82f6', '#8b5cf6', '#ec4899', '#10b981', '#f59e0b']
boxes.value.forEach(box => {
box.color = colors[Math.floor(Math.random() * colors.length)]
})
updateMetrics('改变颜色', 50, boxes.value.length)
}
function changeBackground() {
const bgs = ['#dbeafe', '#ede9fe', '#fce7f3', '#d1fae5', '#fef3c7']
boxes.value.forEach(box => {
box.bg = bgs[Math.floor(Math.random() * bgs.length)]
})
updateMetrics('改变背景', 45, boxes.value.length)
}
function toggleBorder() {
boxes.value.forEach(box => {
box.border = !box.border
})
updateMetrics('切换边框', 55, boxes.value.length)
}
function transformTranslate() {
boxes.value.forEach(box => {
box.x += Math.random() * 20 - 10
})
updateMetrics('Transform 位移', 10, boxes.value.length)
}
function transformRotate() {
boxes.value.forEach(box => {
box.rotation += Math.random() * 30 - 15
})
updateMetrics('Transform 旋转', 10, boxes.value.length)
}
function changeOpacity() {
boxes.value.forEach(box => {
box.opacity = 0.5 + Math.random() * 0.5
})
updateMetrics('改变透明度', 10, boxes.value.length)
}
</script>
<style scoped>
.reflow-demo {
border: 1px solid var(--vp-c-divider);
background: var(--vp-c-bg-soft);
border-radius: 12px;
padding: 1.5rem;
margin: 1.5rem 0;
font-family: var(--vp-font-family-base);
}
.header {
margin-bottom: 1.5rem;
}
.title {
font-weight: 700;
font-size: 1.05rem;
}
.subtitle {
color: var(--vp-c-text-2);
font-size: 0.9rem;
margin-top: 0.3rem;
}
.demo-container {
display: grid;
grid-template-columns: 1fr 300px;
gap: 1.5rem;
margin-bottom: 1.5rem;
}
@media (max-width: 768px) {
.demo-container {
grid-template-columns: 1fr;
}
}
.canvas-area {
background: var(--vp-c-bg);
border: 1px solid var(--vp-c-divider);
border-radius: 10px;
padding: 1.5rem;
}
.box-container {
position: relative;
height: 250px;
margin-bottom: 1.5rem;
border: 2px dashed var(--vp-c-divider);
border-radius: 8px;
}
.box {
position: absolute;
display: flex;
align-items: center;
justify-content: center;
font-weight: 700;
font-size: 1.2rem;
border-radius: 8px;
cursor: pointer;
transition: all 0.3s ease;
user-select: none;
}
.box:hover {
box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}
.box.selected {
box-shadow: 0 0 0 3px var(--vp-c-brand);
}
.performance-meter {
margin-bottom: 1rem;
}
.meter-label {
font-size: 0.85rem;
color: var(--vp-c-text-2);
margin-bottom: 0.5rem;
}
.meter-bar {
height: 12px;
background: var(--vp-c-bg-soft);
border-radius: 6px;
overflow: hidden;
margin-bottom: 0.5rem;
}
.meter-fill {
height: 100%;
transition: all 0.5s ease;
border-radius: 6px;
}
.meter-fill.good {
background: linear-gradient(90deg, #22c55e, #14b8a6);
}
.meter-fill.medium {
background: linear-gradient(90deg, #f59e0b, #f97316);
}
.meter-fill.high {
background: linear-gradient(90deg, #ef4444, #dc2626);
}
.meter-value {
font-size: 0.9rem;
font-weight: 600;
text-align: right;
}
.meter-value.good {
color: #22c55e;
}
.meter-value.medium {
color: #f59e0b;
}
.meter-value.high {
color: #ef4444;
}
.stats {
display: flex;
gap: 1rem;
}
.stat-item {
flex: 1;
background: var(--vp-c-bg-soft);
border-radius: 8px;
padding: 0.8rem;
}
.stat-label {
font-size: 0.75rem;
color: var(--vp-c-text-2);
margin-bottom: 0.3rem;
}
.stat-value {
font-size: 0.95rem;
font-weight: 600;
color: var(--vp-c-text-1);
}
.controls {
display: flex;
flex-direction: column;
gap: 1rem;
}
.control-section {
background: var(--vp-c-bg);
border: 1px solid var(--vp-c-divider);
border-radius: 8px;
padding: 1rem;
}
.control-section h4 {
font-size: 0.9rem;
font-weight: 600;
margin-bottom: 0.3rem;
color: var(--vp-c-text-1);
}
.control-desc {
font-size: 0.75rem;
color: var(--vp-c-text-2);
margin-bottom: 0.8rem;
}
.btn {
display: block;
width: 100%;
padding: 0.6rem;
margin-bottom: 0.5rem;
border: none;
border-radius: 6px;
font-size: 0.85rem;
font-weight: 500;
cursor: pointer;
transition: all 0.2s;
color: #fff;
}
.btn:last-child {
margin-bottom: 0;
}
.btn.reflow {
background: linear-gradient(135deg, #ef4444, #dc2626);
}
.btn.reflow:hover {
background: linear-gradient(135deg, #dc2626, #b91c1c);
}
.btn.repaint {
background: linear-gradient(135deg, #f59e0b, #f97316);
}
.btn.repaint:hover {
background: linear-gradient(135deg, #f97316, #ea580c);
}
.btn.composite {
background: linear-gradient(135deg, #22c55e, #14b8a6);
}
.btn.composite:hover {
background: linear-gradient(135deg, #14b8a6, #0d9488);
}
.info-section {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
gap: 1rem;
}
.info-card {
background: var(--vp-c-bg);
border: 1px solid var(--vp-c-divider);
border-radius: 8px;
padding: 1rem;
}
.info-card h4 {
font-size: 0.9rem;
font-weight: 600;
margin-bottom: 0.5rem;
color: var(--vp-c-text-1);
}
.info-card p {
font-size: 0.85rem;
color: var(--vp-c-text-2);
line-height: 1.6;
margin: 0;
}
</style>