key-value pair. Route parameters may come from a few different places:</p>
<ul>
<li>route interpolations (e.g. if a route is <code>/users/:id</code>, and it resolves to <code>/users/1</code>, the route parameter has a key <code>id</code> and value <code>&quot;1&quot;</code>)</li>
<li>router querystrings (e.g. if the path is <code>/users?page=1</code>, the route parameter has a key <code>page</code> and value <code>&quot;1&quot;</code>)</li>
<li><code>history.state</code> (e.g. if history.state is <code>{foo