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test-repo/docs/.vitepress/theme/components/appendix/backend-evolution/BackendEvolutionDemo.vue
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<template>
<div class="backend-evolution-demo">
<!-- Timeline -->
<div class="timeline-container">
<div class="timeline-track"></div>
<button
v-for="(stage, index) in stages"
:key="index"
class="timeline-node"
:class="{ active: currentStage === index, passed: currentStage > index }"
@click="currentStage = index"
>
<div class="node-dot">
<div class="inner-dot"></div>
</div>
<div class="node-content">
<span class="year-badge">{{ stage.year }}</span>
<span class="node-label">{{ stage.label }}</span>
</div>
</button>
</div>
<!-- Content -->
<div class="content-wrapper">
<transition name="fade-slide" mode="out-in">
<div :key="currentStage" class="stage-content">
<div class="header-section">
<h3>
<span class="stage-index">{{ indexToRoman(currentStage + 1) }}.</span>
{{ stages[currentStage].title }}
</h3>
<p>{{ stages[currentStage].desc }}</p>
</div>
<div class="visualization-grid">
<!-- Architecture Diagram -->
<div class="mac-window arch-window">
<div class="window-bar">
<div class="traffic-lights">
<span class="light red"></span>
<span class="light yellow"></span>
<span class="light green"></span>
</div>
<div class="window-title">Server Architecture</div>
</div>
<div class="arch-canvas">
<!-- Stage 0: CGI/Static -->
<div v-if="currentStage === 0" class="arch-static">
<div class="server-box">
<div class="server-icon">🖥 Physical Server</div>
<div class="file-system">
<div class="file">index.html</div>
<div class="file">script.pl</div>
<div class="file">image.jpg</div>
</div>
</div>
<div class="request-arrow">
<span>GET /index.html</span>
<span class="arrow"></span>
</div>
</div>
<!-- Stage 1: Monolith -->
<div v-if="currentStage === 1" class="arch-monolith">
<div class="server-box big">
<div class="server-icon">🦍 Monolithic App (Tomcat/Django)</div>
<div class="modules-grid">
<div class="module">User</div>
<div class="module">Order</div>
<div class="module">Payment</div>
<div class="module">Product</div>
</div>
<div class="db-connection">
<span> SQL</span>
<div class="db-icon">🗄 Single DB</div>
</div>
</div>
</div>
<!-- Stage 2: Microservices -->
<div v-if="currentStage === 2" class="arch-micro">
<div class="cloud-bg">
<div class="service-mesh">
<div class="service user">
<span>User Svc</span>
<small>Redis</small>
</div>
<div class="service order">
<span>Order Svc</span>
<small>MySQL</small>
</div>
<div class="service pay">
<span>Pay Svc</span>
<small>Postgres</small>
</div>
</div>
</div>
<div class="comm-lines">HTTP/gRPC</div>
</div>
<!-- Stage 3: Serverless -->
<div v-if="currentStage === 3" class="arch-serverless">
<div class="function-cloud">
<div class="func-node">λ Login</div>
<div class="func-node">λ Checkout</div>
<div class="func-node">λ ResizeImg</div>
</div>
<div class="baas-layer">
<span>BaaS (Auth0, Supabase, Stripe)</span>
</div>
</div>
</div>
</div>
<!-- Deployment/Ops View -->
<div class="mac-window ops-window">
<div class="window-bar">
<div class="window-title">Deployment & Ops</div>
</div>
<div class="ops-canvas">
<div class="ops-card">
<div class="ops-icon">{{ stages[currentStage].opsIcon }}</div>
<div class="ops-title">{{ stages[currentStage].opsTitle }}</div>
<div class="ops-desc">{{ stages[currentStage].opsDesc }}</div>
</div>
</div>
</div>
</div>
</div>
</transition>
</div>
</div>
</template>
<script setup>
import { ref } from 'vue'
const currentStage = ref(0)
const indexToRoman = (num) => {
const map = { 1: 'I', 2: 'II', 3: 'III', 4: 'IV' }
return map[num] || num
}
const stages = [
{
year: '1990s',
label: 'CGI / Static',
title: 'Physical Servers & Scripts',
desc: 'In the beginning, servers were physical machines. We uploaded files via FTP. Backend logic was often simple Perl/CGI scripts executing one by one.',
opsIcon: '🐌',
opsTitle: 'Manual FTP Upload',
opsDesc: 'Development was slow. "It works on my machine" was the common nightmare. Scaling meant buying a bigger physical computer.'
},
{
year: '2000s',
label: 'Monolith',
title: 'The Monolithic Era',
desc: 'Frameworks like Java Spring, Rails, Django appeared. All logic (User, Order, Pay) was packed into ONE giant process. Simple to develop, hard to scale.',
opsIcon: '🐳',
opsTitle: 'Virtual Machines (VM)',
opsDesc: 'We started using VMs (AWS EC2). Scaling meant copying the entire giant application to multiple servers behind a Load Balancer.'
},
{
year: '2014+',
label: 'Microservices',
title: 'Microservices & Containers',
desc: 'Breaking the monolith! Each function (User, Order) became a separate tiny server. Docker changed the game by packaging dependencies together.',
opsIcon: '☸️',
opsTitle: 'Kubernetes (K8s)',
opsDesc: 'Orchestrating thousands of containers. Complexity exploded, but teams could work independently and scale specific parts (e.g., just the Payment service).'
},
{
year: '2020s+',
label: 'Serverless',
title: 'Serverless & Edge',
desc: 'No more managing servers. You just write a function (e.g., "resize image") and upload it. The cloud provider runs it only when needed (Pay-per-use).',
opsIcon: '⚡',
opsTitle: 'GitOps & Edge',
opsDesc: 'Push to Git -> Auto Deploy to global Edge nodes (Vercel, Cloudflare). Backend becomes "Functions + Managed Services (BaaS)".'
}
]
</script>
<style scoped>
.backend-evolution-demo {
border-radius: 16px;
background: var(--vp-c-bg);
box-shadow: 0 8px 30px rgba(0,0,0,0.05);
border: 1px solid var(--vp-c-divider);
overflow: hidden;
margin: 2rem 0;
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
/* Timeline (Reused) */
.timeline-container {
padding: 2rem 1rem 1rem;
background: linear-gradient(to bottom, var(--vp-c-bg-soft), var(--vp-c-bg));
display: flex;
justify-content: space-between;
position: relative;
border-bottom: 1px solid var(--vp-c-divider);
}
.timeline-track {
position: absolute;
top: 2.5rem;
left: 3rem;
right: 3rem;
height: 2px;
background: var(--vp-c-divider);
z-index: 0;
}
.timeline-node {
position: relative;
z-index: 1;
background: transparent;
border: none;
display: flex;
flex-direction: column;
align-items: center;
cursor: pointer;
padding: 0;
width: 25%;
transition: all 0.3s ease;
opacity: 0.6;
}
.timeline-node:hover { opacity: 0.9; }
.timeline-node.active, .timeline-node.passed { opacity: 1; }
.node-dot {
width: 16px;
height: 16px;
border-radius: 50%;
background: var(--vp-c-bg);
border: 2px solid var(--vp-c-text-3);
margin-bottom: 0.8rem;
display: flex;
align-items: center;
justify-content: center;
transition: all 0.3s;
}
.inner-dot {
width: 0;
height: 0;
border-radius: 50%;
background: var(--vp-c-brand);
transition: all 0.3s;
}
.timeline-node.active .node-dot {
border-color: var(--vp-c-brand);
transform: scale(1.3);
box-shadow: 0 0 0 4px var(--vp-c-bg-soft);
}
.timeline-node.active .inner-dot { width: 8px; height: 8px; }
.timeline-node.passed .node-dot { border-color: var(--vp-c-brand); background: var(--vp-c-brand); }
.node-content {
text-align: center;
display: flex;
flex-direction: column;
align-items: center;
gap: 0.2rem;
}
.year-badge {
font-size: 0.75rem;
font-family: var(--vp-font-family-mono);
background: var(--vp-c-bg-alt);
padding: 2px 6px;
border-radius: 4px;
color: var(--vp-c-text-2);
}
.node-label {
font-size: 0.85rem;
font-weight: 600;
color: var(--vp-c-text-1);
}
/* Content */
.content-wrapper { padding: 2rem; min-height: 400px; }
.header-section {
text-align: center;
margin-bottom: 2rem;
max-width: 600px;
margin: 0 auto 2rem;
}
.header-section h3 {
font-size: 1.5rem;
margin-bottom: 0.5rem;
background: linear-gradient(120deg, #f59e0b, #ea580c); /* Orange/Amber for Backend */
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
}
.stage-index { color: var(--vp-c-text-3); -webkit-text-fill-color: var(--vp-c-text-3); margin-right: 0.5rem; font-weight: normal; }
.header-section p { font-size: 1rem; color: var(--vp-c-text-2); line-height: 1.6; }
/* Visualizations */
.visualization-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 2rem;
align-items: stretch;
}
@media (max-width: 768px) { .visualization-grid { grid-template-columns: 1fr; } }
.mac-window {
border-radius: 12px;
border: 1px solid rgba(0,0,0,0.1);
box-shadow: 0 10px 30px rgba(0,0,0,0.05);
overflow: hidden;
display: flex;
flex-direction: column;
background: white;
transition: transform 0.3s;
}
.mac-window:hover { transform: translateY(-5px); }
.arch-window { background: #f1f5f9; }
.ops-window { background: white; }
.window-bar {
padding: 0.8rem 1rem;
background: white;
border-bottom: 1px solid rgba(0,0,0,0.05);
display: flex;
align-items: center;
position: relative;
}
.traffic-lights { display: flex; gap: 6px; }
.light { width: 10px; height: 10px; border-radius: 50%; }
.light.red { background: #ff5f56; }
.light.yellow { background: #ffbd2e; }
.light.green { background: #27c93f; }
.window-title {
position: absolute;
left: 0;
right: 0;
text-align: center;
font-size: 0.8rem;
color: var(--vp-c-text-2);
font-weight: 600;
}
.arch-canvas, .ops-canvas {
padding: 2rem;
flex: 1;
display: flex;
align-items: center;
justify-content: center;
min-height: 250px;
}
/* Arch Styles */
.server-box {
background: #cbd5e1;
border: 2px solid #94a3b8;
padding: 1rem;
border-radius: 8px;
text-align: center;
}
.file-system { margin-top: 1rem; background: white; padding: 0.5rem; border-radius: 4px; font-family: monospace; font-size: 0.8rem; }
.request-arrow { margin-top: 1rem; display: flex; flex-direction: column; align-items: center; font-size: 0.8rem; color: #64748b; }
.server-box.big { background: #dbeafe; border-color: #3b82f6; width: 100%; max-width: 250px; }
.modules-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; margin: 1rem 0; }
.module { background: #bfdbfe; padding: 4px; border-radius: 4px; font-size: 0.8rem; color: #1e40af; }
.db-connection { font-size: 0.8rem; display: flex; flex-direction: column; align-items: center; }
.cloud-bg { width: 100%; }
.service-mesh { display: flex; gap: 1rem; justify-content: center; }
.service { background: white; border: 1px solid #e2e8f0; padding: 0.8rem; border-radius: 6px; text-align: center; box-shadow: 0 4px 6px rgba(0,0,0,0.05); display: flex; flex-direction: column; }
.service small { color: #64748b; font-size: 0.7rem; margin-top: 4px; }
.comm-lines { margin-top: 1rem; font-size: 0.8rem; color: #94a3b8; text-align: center; border-top: 1px dashed #cbd5e1; width: 80%; padding-top: 4px; }
.function-cloud { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; margin-bottom: 1.5rem; }
.func-node { background: #fef3c7; border: 1px solid #f59e0b; color: #b45309; padding: 6px 12px; border-radius: 20px; font-family: monospace; font-size: 0.8rem; }
.baas-layer { width: 100%; background: #e0e7ff; padding: 0.5rem; text-align: center; border-radius: 6px; font-size: 0.8rem; color: #4338ca; font-weight: bold; }
/* Ops Card */
.ops-card { text-align: center; }
.ops-icon { font-size: 4rem; margin-bottom: 1rem; }
.ops-title { font-size: 1.2rem; font-weight: bold; margin-bottom: 0.5rem; color: var(--vp-c-text-1); }
.ops-desc { font-size: 0.9rem; color: var(--vp-c-text-2); line-height: 1.5; }
/* Transitions */
.fade-slide-enter-active, .fade-slide-leave-active { transition: all 0.4s ease; }
.fade-slide-enter-from { opacity: 0; transform: translateY(20px); }
.fade-slide-leave-to { opacity: 0; transform: translateY(-20px); }
</style>