Qwik.js: Kapan dan Kenapa? Panduan Memilih Framework yang Tepat

TL;DR

Qwik BEST FOR: Content-heavy websites (news, e-commerce listings, blogs, marketing sites)
Qwik NOT FOR: Canvas apps, real-time collaboration, games, complex dashboards
Alternative: React/Vue/Svelte untuk interactive apps

Apa itu Qwik.js?

Qwik adalah framework JavaScript yang fokus pada resumability - kemampuan untuk melanjutkan eksekusi aplikasi tanpa perlu hydration.

Traditional Framework (React/Vue/Svelte)

1. Server render HTML
2. Send HTML to browser
3. Download ALL JavaScript (100KB-1MB)
4. Hydration: Re-execute ALL components
5. App interactive ⏱️ 2-5 seconds

Qwik Resumability

1. Server render HTML + serialize state
2. Send HTML to browser (JS = 0KB!)
3. User sees content instantly ⚡
4. User clicks button → Download ONLY that button's JS (1KB)
5. Execute → Interactive ⏱️ 50ms

Kapan Menggunakan Qwik?

✅ Perfect Use Cases

1. Content-Heavy Websites

// E-commerce product listing
// News portal
// Blog platform
// Documentation site

Kenapa?

User mayoritas consume content, bukan interact
Initial load instant (0 JS)
JS load on-demand saat user interact
Perfect untuk SEO

2. High-Traffic, Low-Interaction Apps

// Product catalogs
// Recipe websites
// Real estate listings
// Job boards

Benefit:

Hemat bandwidth = hemat biaya server
Better Core Web Vitals
Lighthouse score 100/100

3. Marketing & Landing Pages

// Company website
// Product landing page
// Event registration

Advantage:

First Contentful Paint < 1s
Time to Interactive < 100ms
Perfect conversion optimization

❌ NOT Recommended For

1. Canvas-Heavy Apps

// ❌ Figma, Canva, Photopea
// ❌ Image editors
// ❌ Drawing apps

Kenapa tidak?

Butuh immediate interactivity
Canvas libraries (Fabric.js, Konva.js) belum mature di Qwik
Lazy loading tidak membantu

2. Real-time Collaboration

// ❌ Google Docs
// ❌ Notion
// ❌ Miro

Alasan:

Butuh WebSocket connection immediate
State management complex
React/Vue ecosystem lebih mature

3. Games & 3D Apps

// ❌ Browser games
// ❌ Three.js apps
// ❌ WebGL applications

Why not?

Butuh semua JS loaded upfront
Resumability tidak relevan
Performance critical = React/vanilla JS

Real-World Comparison

E-commerce Product Page

React/Next.js:

Initial load: 500KB JS
Time to Interactive: 3s
User scrolls → Already loaded
User clicks "Add to Cart" → Already loaded
Total: 500KB

Qwik:

Initial load: 1KB JS
Time to Interactive: 50ms
User scrolls → Load scroll handler (2KB)
User clicks "Add to Cart" → Load cart logic (5KB)
Total: 8KB vs 500KB ✅

Canvas Editor (Figma-like)

React + Fabric.js:

Initial load: 800KB JS
Time to Interactive: 4s
Canvas ready: 4s
Drawing: Smooth ✅

Qwik + Fabric.js:

Initial load: 1KB JS
Canvas library load: On-demand
Integration: Complex ❌
Ecosystem: Limited ❌
Better choice: React ✅

Kenapa Syntax Mirip React?

Strategi Marketing

Qwik sengaja dibuat mirip React untuk:

Developer React bisa langsung pakai
Migrasi lebih mudah
Adoption lebih cepat

Tapi Filosofi Berbeda

React:

// Load everything, optimize later
import { useState } from 'react';

function Counter() {
  const [count, setCount] = useState(0);
  return <button onClick={() => setCount(count + 1)}>{count}</button>;
}

Qwik:

// Load nothing, load on-demand
import { component$, useSignal } from '@builder.io/qwik';

export default component$(() => {
  const count = useSignal(0);
  return <button onClick$={() => count.value++}>{count.value}</button>;
});

Perhatikan $ suffix - ini signal untuk Qwik optimizer bahwa code ini bisa di-lazy load.

Resumability Explained

Analogi Sederhana

React/Vue/Svelte (Buffet):

Semua makanan sudah di meja (load all JS)
Mau makan apa aja, langsung ambil
Tapi setup buffet lama (hydration)

Qwik (Restaurant):

Menu sudah ada (HTML)
Pesan apa, baru masak itu (load JS on-demand)
Duduk langsung, lihat menu instant
Makanan datang cepat karena cuma masak yang dipesan

Performance Metrics

Lighthouse Scores

Framework	FCP	TTI	TBT	LCP
Qwik	0.5s	0.1s	0ms	0.8s
React	1.2s	3.5s	200ms	2.1s
Vue	1.0s	3.0s	150ms	1.8s
Svelte	0.8s	2.5s	100ms	1.5s

Note: Untuk content-heavy sites. Interactive apps akan berbeda.

Market Reality

Adoption Rate

React: 80% market share
Vue: 10% market share
Svelte: 5% market share
Qwik: <1% market share

Companies Using Qwik

Builder.io (creator) - CMS platform
Partytown - 3rd party script optimizer
Marketing sites yang butuh perfect Lighthouse score

Decision Matrix

Pilih Qwik Jika:

✅ Content-heavy website
✅ SEO critical
✅ High traffic, low interaction
✅ Marketing/landing pages
✅ Blog/documentation

Pilih React Jika:

✅ Interactive dashboard
✅ Canvas/drawing apps
✅ Real-time collaboration
✅ Complex state management
✅ Mature ecosystem needed

Pilih Vue Jika:

✅ Simpler than React
✅ Progressive enhancement
✅ Good balance

Pilih Svelte Jika:

✅ Minimal boilerplate
✅ Best DX
✅ Smallest bundle

Code Example: Same App, Different Frameworks

Qwik

import { component$, useSignal } from '@builder.io/qwik';

export default component$(() => {
  const todos = useSignal<string[]>([]);
  const input = useSignal('');

  return (
    <div>
      <input
        value={input.value}
        onInput$={(e) => (input.value = e.target.value)}
      />
      <button onClick$={() => {
        todos.value = [...todos.value, input.value];
        input.value = '';
      }}>
        Add
      </button>
      <ul>
        {todos.value.map((todo) => (
          <li key={todo}>{todo}</li>
        ))}
      </ul>
    </div>
  );
});

React

import { useState } from 'react';

export default function TodoApp() {
  const [todos, setTodos] = useState<string[]>([]);
  const [input, setInput] = useState('');

  return (
    <div>
      <input
        value={input}
        onChange={(e) => setInput(e.target.value)}
      />
      <button onClick={() => {
        setTodos([...todos, input]);
        setInput('');
      }}>
        Add
      </button>
      <ul>
        {todos.map((todo) => (
          <li key={todo}>{todo}</li>
        ))}
      </ul>
    </div>
  );
}

Hampir identik! Tapi Qwik akan lazy load event handlers.

Kesimpulan

Qwik Bukan Pengganti React

Qwik adalah specialized tool untuk use case tertentu:

Content-heavy sites
SEO-critical apps
High-traffic, low-interaction

Jangan Gunakan Qwik Untuk

Canvas apps (gunakan React + Fabric.js)
Real-time collaboration (gunakan React/Vue)
Games (gunakan vanilla JS/React)
Complex dashboards (gunakan React/Vue)

Bottom Line

Pilih tool yang tepat untuk masalah yang tepat.

Qwik brilliant untuk content sites. Tapi untuk interactive apps, React/Vue/Svelte masih king.

Resources

Diskusi

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Tags: #qwik #react #webdev #performance #javascript #framework

Artikel ini ditulis berdasarkan pengalaman real-world development dan analisis mendalam tentang use cases yang tepat untuk setiap framework.