What is React Router?
React Router is a library that lets you navigate between different views in a React app without a full page reload. It keeps the URL in sync with what is shown by mapping URL paths to components.
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More FAQs in What Is React Router and How Does Client-Side Routing Work?
In server-side routing, every link triggers a full page reload from the server. In client-side routing, JavaScript intercepts navigation, updates the URL, and swaps the view without reloading the page, which makes transitions instant.
Because the browser does not re-download HTML, CSS, and JS on every navigation. JavaScript just swaps the view and updates the URL, so transitions are instant and component state can be preserved.
It maps URL paths to components. When the URL matches a route, the corresponding component renders. It uses the browser History API to update the URL and listen for changes, which makes the back and forward buttons work.
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