This codemod automates the process of splitting your TanStack Router route files into two separate files to enable code splitting. By utilizing this codemod, you can easily move non-critical route configuration, such as the component, into a separate `.lazy.tsx` file, which allows for better performance and reduced initial load time in your React application.
## Before Code Splitting
In the original setup, all route configurations, including critical and non-critical parts, are contained within a single file.
```tsx
// src/routes/posts.tsx
import { createFileRoute } from '@tanstack/react-router';
import { fetchPosts } from './api';
export const Route = createFileRoute('/posts')({
loader: fetchPosts,
component: Posts,
});
function Posts() {
// ...
}
```
## After Code Splitting
After running the codemod, the route configuration is split into two files:
### Critical Route Configuration
The critical part of the route configuration remains in the original file:
```tsx
// src/routes/posts.tsx
import { createFileRoute } from '@tanstack/react-router';
import { fetchPosts } from './api';
export const Route = createFileRoute('/posts')({
loader: fetchPosts,
});
```
### Non-Critical Route Configuration
The non-critical part, such as the component, is moved to a new `.lazy.tsx` file:
```tsx
// src/routes/posts.lazy.tsx
import { createLazyFileRoute } from '@tanstack/react-router';
export const Route = createLazyFileRoute('/posts')({
component: Posts,
});
function Posts() {
// ...
}
```
