React 16 & 17 support

[tmeindle]

router/packages/react-router/package.json

Lines 41 to 42 in 0e26a51

	"react": ">=16",
	"react-dom": ">=16"

Are the peer dependencies correct? Is this library supposed to support react < 18?

The RouterProvider uses a startTransition with out any way to skip the call which generates a runtime error when used with react 17.0.2 (which I am currently restricted too)

router/packages/react-router/src/react.tsx

Line 637 in 0e26a51

React.startTransition(() => {

Is the react transition api a requirement of the router working correctly? Could there be a router provider prop that would default links and router provider to not use the startTransition calls.

[tmeindle]

I tried removing the calls to startTransition and while the router works it seems to re-render the entire app for every route change (i.e. the window blinks). No dialog after 3 weeks, I am going to assume that react < 18 is not going to be supported.

[jdefting]

I'm wondering this to. Release v1 is out and the docs say the library supports v16.8+.

router/docs/installation.md

Line 11 in 912fae7

TanStack Router is compatible with React v16.8+ and is currently only compatible with ReactDOM only. If you would like to contribute to the React Native adapter, please reach out to us on [Discord](https://tlinz.com/discord).

But there's still useTransition() usage which is React 18 API.

router/packages/react-router/src/RouterProvider.tsx

Line 110 in 912fae7

const [isTransitioning, startReactTransition] = React.useTransition()

[jdefting]

There shouldn't be issues with useTransition now: #900