Routing

Configuring Routes

Routes are configured in app/routes.ts. Each route has two required parts: a URL pattern to match the URL, and a file path to the route module that defines its behavior.

import {
  type RouteConfig,
  route,
} from "@react-router/dev/routes";

export default [
  route("some/path", "./some/file.tsx"),
  // pattern ^           ^ module file
] satisfies RouteConfig;

Here is a larger sample route config:

import {
  type RouteConfig,
  route,
  index,
  layout,
  prefix,
} from "@react-router/dev/routes";

export default [
  index("./home.tsx"),
  route("about", "./about.tsx"),

  layout("./auth/layout.tsx", [
    route("login", "./auth/login.tsx"),
    route("register", "./auth/register.tsx"),
  ]),

  ...prefix("concerts", [
    index("./concerts/home.tsx"),
    route(":city", "./concerts/city.tsx"),
    route("trending", "./concerts/trending.tsx"),
  ]),
] satisfies RouteConfig;

If you prefer to define your routes via file naming conventions rather than configuration, the @react-router/fs-routes package provides a file system routing convention.

Route Modules

The files referenced in routes.ts define each route's behavior:

route("teams/:teamId", "./team.tsx"),
//           route module ^^^^^^^^

Here's a sample route module:

// provides type safety/inference
import type { Route } from "./+types/team";

// provides `loaderData` to the component
export async function loader({ params }: Route.LoaderArgs) {
  let team = await fetchTeam(params.teamId);
  return { name: team.name };
}

// renders after the loader is done
export default function Component({
  loaderData,
}: Route.ComponentProps) {
  return <h1>{loaderData.name}</h1>;
}

Route modules have more features like actions, headers, and error boundaries, but they will be covered in the next guide: Route Modules

Nested Routes

Routes can be nested inside parent routes.

import {
  type RouteConfig,
  route,
  index,
} from "@react-router/dev/routes";

export default [
  // parent route
  route("dashboard", "./dashboard.tsx", [
    // child routes
    index("./home.tsx"),
    route("settings", "./settings.tsx"),
  ]),
] satisfies RouteConfig;

The path of the parent is automatically included in the child, so this config creates both "/dashboard" and "/dashboard/settings" URLs.

Child routes are rendered through the <Outlet/> in the parent route.

import { Outlet } from "react-router";

export default function Dashboard() {
  return (
    <div>
      <h1>Dashboard</h1>
      {/* will either be home.tsx or settings.tsx */}
      <Outlet />
    </div>
  );
}

Root Route

Every route in routes.ts is nested inside the special app/root.tsx module.

Layout Routes

Using layout, layout routes create new nesting for their children, but they don't add any segments to the URL. It's like the root route but they can be added at any level.

import {
  type RouteConfig,
  route,
  layout,
  index,
  prefix,
} from "@react-router/dev/routes";

export default [
  layout("./marketing/layout.tsx", [
    index("./marketing/home.tsx"),
    route("contact", "./marketing/contact.tsx"),
  ]),
  ...prefix("projects", [
    index("./projects/home.tsx"),
    layout("./projects/project-layout.tsx", [
      route(":pid", "./projects/project.tsx"),
      route(":pid/edit", "./projects/edit-project.tsx"),
    ]),
  ]),
] satisfies RouteConfig;

To see projects/home.tsx appear in the layout, we'll need an outlet:

import { Outlet } from "react-router";

export default function ProjectLayout() {
  return (
    <div>
      <aside>Example sidebar</aside>
      <main>
        <Outlet />
      </main>
    </div>
  );
}

Index Routes

index(componentFile),

Index routes render into their parent's Outlet at their parent's URL (like a default child route).

import {
  type RouteConfig,
  route,
  index,
} from "@react-router/dev/routes";

export default [
  // renders into the root.tsx Outlet at /
  index("./home.tsx"),
  route("dashboard", "./dashboard.tsx", [
    // renders into the dashboard.tsx Outlet at /dashboard
    index("./dashboard-home.tsx"),
    route("settings", "./dashboard-settings.tsx"),
  ]),
] satisfies RouteConfig;

Note that index routes can't have children.

Route Prefixes

Using prefix, you can add a path prefix to a set of routes without needing to introduce a parent route file.

import {
  type RouteConfig,
  route,
  layout,
  index,
  prefix,
} from "@react-router/dev/routes";

export default [
  layout("./marketing/layout.tsx", [
    index("./marketing/home.tsx"),
    route("contact", "./marketing/contact.tsx"),
  ]),
  ...prefix("projects", [
    index("./projects/home.tsx"),
    layout("./projects/project-layout.tsx", [
      route(":pid", "./projects/project.tsx"),
      route(":pid/edit", "./projects/edit-project.tsx"),
    ]),
  ]),
] satisfies RouteConfig;

Dynamic Segments

If a path segment starts with : then it becomes a "dynamic segment". When the route matches the URL, the dynamic segment will be parsed from the URL and provided as params to other router APIs.

route("teams/:teamId", "./team.tsx"),

import type { Route } from "./+types/team";

export async function loader({ params }: Route.LoaderArgs) {
  //                           ^? { teamId: string }
}

export default function Component({
  params,
}: Route.ComponentProps) {
  params.teamId;
  //        ^ string
}

You can have multiple dynamic segments in one route path:

route("c/:categoryId/p/:productId", "./product.tsx"),

import type { Route } from "./+types/product";

async function loader({ params }: LoaderArgs) {
  //                    ^? { categoryId: string; productId: string }
}

Optional Segments

You can make a route segment optional by adding a ? to the end of the segment.

route(":lang?/categories", "./categories.tsx"),

You can have optional static segments, too:

route("users/:userId/edit?", "./user.tsx");

Splats

Also known as "catchall" and "star" segments. If a route path pattern ends with /* then it will match any characters following the /, including other / characters.

route("files/*", "./files.tsx"),

export async function loader({ params }: Route.LoaderArgs) {
  // params["*"] will contain the remaining URL after files/
}

You can destructure the *, you just have to assign it a new name. A common name is splat:

const { "*": splat } = params;

Component Routes

You can also use components that match the URL to elements anywhere in the component tree:

import { Routes, Route } from "react-router";

function Wizard() {
  return (
    <div>
      <h1>Some Wizard with Steps</h1>
      <Routes>
        <Route index element={<StepOne />} />
        <Route path="step-2" element={<StepTwo />} />
        <Route path="step-3" element={<StepThree />}>
      </Routes>
    </div>
  );
}

Note that these routes do not participate in data loading, actions, code splitting, or any other route module features, so their use cases are more limited than those of the route module.

Next: Route Module