React Router
React Router is the most widely used routing library for React, enabling single-page applications to render different components based on the URL and manage navigation without full page reloads.
Definition
React Router is the most widely used routing library for React, enabling single-page applications to render different components based on the URL and manage navigation without full page reloads.
Overview
React Router lets a React application map URL paths to components, so a single-page app can present multiple 'pages' while only ever loading one HTML document. It intercepts navigation, updates the browser's URL and history, and re-renders the matching component tree — enabling standard web behaviors like the back button, deep linking, and bookmarkable URLs inside what is technically a single page. Modern React Router (v6 and later) centers on a declarative route configuration that maps paths to elements, supports nested routes via an `<Outlet>` for shared layouts, dynamic segments (like /posts/:id) accessed via hooks such as useParams, and data APIs (loaders and actions) that let route components declare their data dependencies before rendering. This data-loading model overlaps conceptually with what libraries like TanStack Query or SWR handle for general server-state caching. It plays the same architectural role for React Native via React Navigation, though that's a separate library adapted to native navigation patterns rather than URLs. Frameworks like Next.js ship their own file-system-based router built on similar underlying ideas, so React Router is mainly used in client-rendered single-page apps rather than in meta-frameworks that already include routing. It fills the same role in the React ecosystem that Vue Router fills for Vue.js.
Key Features
- Declarative route configuration mapping URL paths to React components
- Nested routes with shared layouts via the Outlet component
- Dynamic route segments accessed through hooks like useParams
- Data loaders and actions for fetching and mutating data tied to a route
- Client-side navigation without full page reloads
- Supports code-splitting routes for smaller initial bundles
- Works alongside browser history for back/forward and deep linking
Use Cases
Frequently Asked Questions
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