Route-based & Component-level Splitting
Split by route (screen-level) and split inside screens (widget-level). Use Suspense near the slow area so the rest stays interactive.
Route-based & Component-level Splitting is a free React Academy lesson on CoddyKit — lesson 2 of 3. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the React Academy learning path, one of 3 lessons in the course, and your progress syncs across the web and the CoddyKit app.
Two levels: route & widget
Aim: Split routes (whole screens) and widgets (heavy parts inside a screen). Keep fallbacks local so the page stays usable.
Where to split & why
- Route-based: split big pages
- Component-level: split charts/editors
- Place Suspense tight to the slow area
Demo: route-style split
Route-based: only the Reports tab is lazy; other tabs render immediately.
<div id="root"></div>
Demo: widget-level split
Component-level: lazy-load a heavy Chart widget; the page shell renders immediately.
<div id="root"></div>
Demo: preload on hover
Preload on intent: start loading when the user hovers the button, so click feels instant.
<div id="root"></div>
Tips & pitfalls
- Avoid one giant boundary; keep it local
- Match fallback size to final UI
- Split by user flows (routes) and heavy widgets, not every tiny component
Split strategy check
Recap
Recap: Split big screens (routes) and heavy widgets. Wrap each slow area in its own Suspense with a tiny fallback; preload on intent for snappier clicks.
Frequently asked questions
Is the “Route-based & Component-level Splitting” lesson free?
Yes — the full text of “Route-based & Component-level Splitting” is free to read here on the web, and the React Academy course includes 3 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the React Academy course, upgrade to CoddyKit PRO.
What will I learn in “Route-based & Component-level Splitting”?
Split by route (screen-level) and split inside screens (widget-level). Use Suspense near the slow area so the rest stays interactive. You practise React Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start React Academy?
No prior experience is required. React Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 2 of 3, so you can start here or from the beginning and move at your own pace.
How long does the “Route-based & Component-level Splitting” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this React Academy lesson?
Yes. Every React Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- React.lazy and Suspense — Lazy Components
- Route-based & Component-level Splitting
- Bundles, Cache & Preloading Hints