- Home
- Skills
- Frontend & Web Apps
- React Router Optimizer
Works with the AI tools you already use
React Router Optimizer
Architect React Router v6/v7 configurations for zero-waterfall data fetching and optimal code-splitting.
$5
React Router Optimizer
Example session with this skill installed
- Read your context and instructions
- Compiled the react router optimizer
- Generated the UI component
1. Performance Audit
The core issue here is a classic render-then-fetch waterfall:
- Router matches
/users/:id→ component tree mounts UserProfilerenders once withuser = null- Then
useEffectfires and the fetch starts - Browser paints "Loading..." with zero data
- Fetch resolves → second render with data
The fetch doesn't start until after JS has parsed, React has committed the initial render, and the effect queue has flushed. That's 100–300ms of pure dead time on a cold navigation, and it compounds badly if this component has children that also fetch on mount (nested waterfalls). There's also no request deduplication, no error boundary, and no caching — navigating away and back re-fetches from scratch every time.
2. Architectural Refactor
Move to a data router with object-based route config so the loader kicks off
in parallel with route module fetching, not after component mount:
// router.tsx
import { createBrowserRouter } from "react-router-dom";
export const router = createBrowserRouter([
{
path: "/users/:id",
lazy: async () => {
const { UserProfile, userLoader } = await import("./routes/UserProfile");
return { Component: UserProfile, loader: userLoader };
},
},
]);
// routes/UserProfile.tsx
import { Suspense } from "react";
import { Await, useLoaderData, defer, type LoaderFunctionArgs } from "react-router-dom";
interface User {
id: string;
name: string;
}
export function userLoader({ params }: LoaderFunctionArgs) {
const userPromise = fetch(`/api/users/${params.id}`).then((res) => {
if (!res.ok) throw new Response("Not found", { status: res.status });
return res.json() as Promise<User>;
});
return defer({ user: userPromise });
}
export function UserProfile() {
const { user } = useLoaderData() as { user: Promise<User> };
return (
<Suspense fallback={<div>Loading...</div>}>
<Await resolve={user} errorElement={<div>Failed to load user.</div>}>
{(resolved: User) => (
<div>
<h1>{resolved.name}</h1>
</div>
)}
</Await>
</Suspense>
);
}
Key change: the fetch call now lives in loader, which React Router invokes
as soon as navigation is triggered — before the destination component's JS chunk even finishes downloading, if you're using lazy(). defer means we don't block the transition on the fetch either; the route renders immediately and streams the user data in via <Await>.
3. Data & State Implementation
For the "instant transition, stream in data" behavior you want, defer is doing the heavy lifting. A few refinements worth adding:
Revalidation control — prevent unnecessary re-fetches on sibling route changes:
export function shouldRevalidate({ currentParams, nextParams }: ShouldRevalidateFunctionArgs) {
return currentParams.id !== nextParams.id;
}
Parallel data needs — if UserProfile also needs, say, the user's recent activity, fetch both in the loader concurrently rather than nesting effects:
export function userLoader({ params }: LoaderFunctionArgs) {
const userPromise = fetch(`/api/users/${params.id}`).then((r) => r.json());
const activityPromise = fetch(`/api/users/${params.id}/activity`).then((r) => r.json());
// Critical data (user) can be awaited if it's small/fast;
// secondary data (activity) stays deferred/streamed.
return defer({
user: userPromise,
activity: activityPromise,
});
}
Abort on navigation away — loaders receive a request.signal; pass it through so in-flight fetches cancel cleanly:
export function userLoader({ params, request }: LoaderFunctionArgs) {
const userPromise = fetch(`/api/users/${params.id}`, { signal: request.signal })
.then((r) => r.json());
return defer({ user: userPromise });
}
If you're open to it, this is also the point where migrating to
v7 framework mode pays off — route modules give you clientLoader + server-rendered loader co-location and automatic request deduplication without hand-rolling a cache layer.
4. Build Tool Directives
For Webpack, to make sure the lazy() route above actually splits into its own chunk instead of getting bundled into main.js:
// webpack.config.js
module.exports = {
optimization: {
splitChunks: {
chunks: "all",
cacheGroups: {
// Isolate route-level chunks
routes: {
test: /[\\/]src[\\/]routes[\\/]/,
name(module) {
const match = module.context.match(/routes[\\/](.*?)([\\/]|$)/);
return `route-${match ? match[1] : "chunk"}`;
},
chunks: "async",
priority: 10,
},
// Separate vendor bundle so route chunks stay small
vendor: {
test: /[\\/]node_modules[\\/]/,
name: "vendors",
chunks: "all",
priority: -10,
},
},
},
},
};
Also confirm import("./routes/UserProfile") isn't accidentally eager — check your bundle analyzer (webpack-bundle-analyzer) after this change to verify UserProfile shows up as its own async chunk, not inlined into the entry point. If Await/defer pulls in extra react-router-dom internals you don't already use elsewhere, expect a small (~1-2kb gzip) bump in the route chunk — that's expected and worth it for the waterfall elimination.
react-router-optimizer.tsx
TSX · React component
Example file from a real run - the skill writes it into your workspace.
Connects securely to your tools. The creator never sees your data.
What you get
About this skill
Eliminate network waterfalls and code bloat with the React Router Optimizer. This elite AI skill audits and refactors React Router v6/v7 architectures to achieve instant page transitions, intelligent data prefetching, and minimal bundle sizes. Perfect for frontend engineers demanding production-grade routing performance, flawless chunk splitting (Vite/Webpack), and perfect Core Web Vitals.
How to install
Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.
- 1
Download the ZIP
Free skills download straight away. Paid skills unlock right after purchase.
- 2
Unzip into your skills folder
Every agent reads skills from one folder on your machine. Drop the unzipped folder in there.
- 3
Ask your agent to use it
Restart the agent if it was already running. It picks the skill up automatically - no config needed.
Skills folder by agent
Click the path to copy it. Create the folder if it does not exist yet.
Reviews
No reviews yet
Be one of the first to try it. Every listed skill passes our trust checks below.
Security scanned
Passed our 8-point scan before listing
Fresh listing
Recently published to Agensi
30-day refund
Not a fit? Get your money back
Trust & safety
Security scanned
Verified clean 19 days ago
- Passed all security checks, Safe to install