Typed React Router

Typed route paths & typed route parameters on top of React Router V6, providing better editor support and increased safety.

• Out of the box
• Automatically infer route params
• Better editor support
• Increased type safety

Principles

typed-react-router uses a combination of typescipt's conditional types & template literal types to infer the route patterns of your app on compile time. The main aim of typed-react-router is to be:

• Type-safe
• Explicit
• Refactorable
• React Router V6 compatible

It discourages links to relative paths and allows the editor to provide auto-completion of absolute paths. This has the advantages of:

• You directly see where a link will be navigating to
• You get auto-completions on all route patterns
• Modifying the (parent) routes will result in compile errors
• Correct route parameters are enforced by the type system

During route declaration, you may use both absolute & relative route paths. When you want to navigate to a route, absolute paths need to be used.

Install

npm install typed-react-router

yarn add typed-react-router

Getting started

typed-react-router works with any project that uses React Router V6 and is built upon its route objects api

1. You need to define your routes as Route Objects
2. Make a const assertion of your routes so that no literal types will be widened (e.g. no going from "/courses" to string). This will enable the typescript compiler to infer the route patterns

export const routes = [
  {
    path: '/',
    element: <Layout />,
    children: [
      { index: true, element: <Home /> },
      {
        path: 'courses',
        element: <Courses />,
        children: [
          { index: true, element: <CoursesIndex /> },
          {
            path: 'details/:courseId',
            element: <Course />,
            children: [
              {
                path: 'students',
                element: <Students />,
                children: [
                  { index: true, element: <StudentsIndex /> },
                  { path: ':studentId', element: <Student /> },
                ],
              },
            ],
          },
        ],
      },
      { path: '*', element: <NoMatch /> },
    ],
  },
] as const // <-- Make sure to use 'as const' instead of a type name

3. Construct a typed router

export const TypedRouter = constructTypedRouter(routes)

4. Use the routes and make sure that the router context is available

For example:

<BrowserRouter>
  <App />
</BrowserRouter>

export function Layout() {
  return (
    <div>
      <nav>
        <ul>
          <li>
            <TypedRouter.Link to="/">Home</TypedRouter.Link>
          </li>
          <li>
            <TypedRouter.Link to="/courses">Courses</TypedRouter.Link>
          </li>
          <li>
            <TypedRouter.Link
              to="/courses/details/:courseId"
              params={{ courseId: 'nothing' }}
            >
              Nothing Here
            </TypedRouter.Link>
          </li>
        </ul>
      </nav>

      <hr />

      <Outlet />
    </div>
  )
}

FAQ

What if I want to use relative paths in my route objects?

This library supports both relative and absolute paths in your routes declarations (the ones that you pass to useRoutes, same as in react-router.

What if I want to make relative links?

Like explained in the Principles section above, typed-react-router is meant to be used by pointing to absolute route paths.

This means that the following code (taken from the Route objects react-router example):

  const routes: RouteObject[] = [
    {
      path: "/",
      element: <Layout />,
      children: [
        { index: true, element: <Home /> },
        {
          path: "/courses",
          element: <Courses />,
          children: [
            { index: true, element: <CoursesIndex /> },
            { path: "/courses/details/:courseId", element: <Course /> }
          ]
        },
        { path: "*", element: <NoMatch /> }
      ]
    }
  ];


...
// omitted for brevity
...

function CoursesIndex() {
  return (
    <div>
      <p>Please choose a course:</p>

      <nav>
        <ul>
          <li>
            <Link to="react-fundamentals">
              React Fundamentals
          </Link>
          </li>
          <li>
            <Link to="advanced-react">
              Advanced React
            </Link>
          </li>
          <li>
            <Link to="react-router">
              React Router
            </Link>
          </li>
        </ul>
      </nav>
    </div>
  );
}

will become:

const { Link } from TypedRouter;

export function CoursesIndex() {
  return (
    <div>
      <p>Please choose a course:</p>

      <nav>
        <ul>
          <li>
            <Link
              to="/courses/details/:courseId"
              params={{ courseId: "react-fundamentals" }}
            >
              React Fundamentals
            </Link>
          </li>
          <li>
            <Link
              to="/courses/details/:courseId"
              params={{ courseId: "advanced-react" }}
            >
              Advanced React
            </Link>
          </li>
          <li>
            <Link
              to="/courses/details/:courseId"
              params={{ courseId: "react-router" }}
            >
              React Router
            </Link>
          </li>
        </ul>
      </nav>
    </div>
  );
}

You can always still use react-router directly as you might seem fit.