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<ol class="chapter"><li class="chapter-item expanded affix "><a href="../../index.html">Introduction</a></li><li class="chapter-item expanded affix "><li class="part-title">Features</li><li class="chapter-item expanded "><a href="../../features/index.html"><strong aria-hidden="true">1.</strong> Adding the Router to Your Application</a></li><li class="chapter-item expanded "><a href="../../features/routes/index.html"><strong aria-hidden="true">2.</strong> Defining Routes</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../features/routes/nested.html"><strong aria-hidden="true">2.1.</strong> Nested Routes</a></li><li class="chapter-item expanded "><a href="../../features/routes/catch_all.html"><strong aria-hidden="true">2.2.</strong> Catch All Routes</a></li><li class="chapter-item expanded "><a href="../../features/routes/matching.html" class="active"><strong aria-hidden="true">2.3.</strong> Matching Routes</a></li><li class="chapter-item expanded "><a href="../../features/routes/fallback.html"><strong aria-hidden="true">2.4.</strong> Fallback Routes (404 page)</a></li><li class="chapter-item expanded "><a href="../../features/routes/multiple-and-redirect.html"><strong aria-hidden="true">2.5.</strong> Multiple Components & Redirects</a></li></ol></li><li class="chapter-item expanded "><a href="../../features/outlets.html"><strong aria-hidden="true">3.</strong> Outlets</a></li><li class="chapter-item expanded "><a href="../../features/navigation/index.html"><strong aria-hidden="true">4.</strong> Links & Navigation</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../features/navigation/name.html"><strong aria-hidden="true">4.1.</strong> Named Navigation</a></li><li class="chapter-item expanded "><a href="../../features/navigation/external.html"><strong aria-hidden="true">4.2.</strong> External Navigation</a></li><li class="chapter-item expanded "><a href="../../features/navigation/programmatic.html"><strong aria-hidden="true">4.3.</strong> Programmatic Navigation</a></li></ol></li><li class="chapter-item expanded "><a href="../../features/query.html"><strong aria-hidden="true">5.</strong> Query</a></li><li class="chapter-item expanded "><a href="../../features/failures/index.html"><strong aria-hidden="true">6.</strong> Navigation Failures</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../features/failures/named.html"><strong aria-hidden="true">6.1.</strong> Named Navigation Failure</a></li><li class="chapter-item expanded "><a href="../../features/failures/external.html"><strong aria-hidden="true">6.2.</strong> External Navigation Failure</a></li><li class="chapter-item expanded "><a href="../../features/failures/redirection-limit.html"><strong aria-hidden="true">6.3.</strong> Redirection Limit Failure</a></li></ol></li><li class="chapter-item expanded "><a href="../../features/history-providers.html"><strong aria-hidden="true">7.</strong> History Providers</a></li><li class="chapter-item expanded "><a href="../../features/history-buttons.html"><strong aria-hidden="true">8.</strong> History Buttons</a></li><li class="chapter-item expanded "><a href="../../features/sitemap-generation.html"><strong aria-hidden="true">9.</strong> Sitemap Generation</a></li><li class="chapter-item expanded "><a href="../../features/routing-update-callback.html"><strong aria-hidden="true">10.</strong> Routing Update Callback</a></li><li class="chapter-item expanded affix "><li class="part-title">Example Project</li><li class="chapter-item expanded "><a href="../../example/index.html"><strong aria-hidden="true">11.</strong> Overview</a></li><li class="chapter-item expanded "><a href="../../example/first-route.html"><strong aria-hidden="true">12.</strong> Creating Our First Route</a></li><li class="chapter-item expanded "><a href="../../example/building-a-nest.html"><strong aria-hidden="true">13.</strong> Building a Nest</a></li><li class="chapter-item expanded "><a href="../../example/navigation-targets.html"><strong aria-hidden="true">14.</strong> Navigation Targets</a></li><li class="chapter-item expanded "><a href="../../example/redirection-perfection.html"><strong aria-hidden="true">15.</strong> Redirection Perfection</a></li><li class="chapter-item expanded "><a href="../../example/full-code.html"><strong aria-hidden="true">16.</strong> Full Code</a></li></ol>
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<h1 class="menu-title">Dioxus Router</h1>
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<main>
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<h1 id="matching-routes"><a class="header" href="#matching-routes">Matching Routes</a></h1>
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<blockquote>
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<p>Make sure you understand how <a href="./catch_all.html">catch all routes</a> work before
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reading this page.</p>
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</blockquote>
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<p>When accepting parameters via the path, some complex applications might need to
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decide what route should be active based on the format of that parameter.
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<em>Matching</em> routes make it easy to implement such behavior.</p>
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<blockquote>
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<p>The parameter will be URL decoded, both for checking if the route is active
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and when it is provided to the application.</p>
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</blockquote>
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<blockquote>
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<p>The example below is only for showing <em>matching route</em> functionality. It is
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unfit for all other purposes.</p>
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</blockquote>
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<h2 id="code-example"><a class="header" href="#code-example">Code Example</a></h2>
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<blockquote>
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<p>Notice that the parameter of a <em>matching route</em> has the same type as a
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<a href="./catch_all.html"><em>catch all route</em></a>.</p>
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</blockquote>
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<pre><pre class="playground"><code class="language-rust edition2021">
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<span class="boring">#![allow(unused)]
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</span><span class="boring">fn main() {
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</span><span class="boring">// Hidden lines (like this one) make the documentation tests work.
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</span><span class="boring">extern crate dioxus;
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</span><span class="boring">use dioxus::prelude::*;
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</span><span class="boring">extern crate dioxus_router;
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</span><span class="boring">use dioxus_router::{history::MemoryHistory, prelude::*};
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</span><span class="boring">extern crate dioxus_ssr;
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</span><span class="boring">extern crate regex;
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</span>use regex::Regex;
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struct Name;
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fn GreetingFemale(cx: Scope) -> Element {
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let route = use_route(cx).unwrap();
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let name = route.parameter::<Name>()
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.map(|name| {
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let mut name = name.to_string();
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name.remove(0);
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name
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})
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.unwrap_or(String::from("Anonymous"));
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render! {
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p { "Hello Mrs. {name}" }
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}
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}
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fn GreetingMale(cx: Scope) -> Element {
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let route = use_route(cx).unwrap();
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let name = route.parameter::<Name>()
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.map(|name| {
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let mut name = name.to_string();
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name.remove(0);
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name
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})
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.unwrap_or(String::from("Anonymous"));
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render! {
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p { "Hello Mr. {name}" }
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}
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}
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fn GreetingWithoutGender(cx: Scope) -> Element {
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let route = use_route(cx).unwrap();
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let name = route.parameter::<Name>()
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.map(|name| name.to_string())
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.unwrap_or(String::from("Anonymous"));
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render! {
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p { "Hello {name}" }
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}
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}
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fn GreetingKenobi(cx: Scope) -> Element {
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render! {
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p { "Hello there." }
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p { "General Kenobi." }
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}
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}
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fn App(cx: Scope) -> Element {
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use_router(
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cx,
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&|| RouterConfiguration {
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<span class="boring"> synchronous: true,
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</span><span class="boring"> history: Box::new(MemoryHistory::with_initial_path("/fAnna").unwrap()),
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</span> ..Default::default()
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},
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&|| {
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Segment::empty()
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.fixed("kenobi", comp(GreetingKenobi))
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.matching(
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Regex::new("^f").unwrap(),
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ParameterRoute::content::<Name>(comp(GreetingFemale))
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)
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.matching(
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Regex::new("^m").unwrap(),
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(comp(GreetingMale), Name { })
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)
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.catch_all((comp(GreetingWithoutGender), Name { }))
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}
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);
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render! {
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Outlet { }
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}
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}
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<span class="boring">
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</span><span class="boring">let mut vdom = VirtualDom::new(App);
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</span><span class="boring">vdom.rebuild();
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</span><span class="boring">let html = dioxus_ssr::render(&vdom);
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</span><span class="boring">assert_eq!(html, "<p>Hello Mrs. Anna</p>");
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</span><span class="boring">}
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</span></code></pre></pre>
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<h2 id="matcher"><a class="header" href="#matcher">Matcher</a></h2>
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<p>In the example above, both <em>matching routes</em> use a regular expression to specify
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when they match. However, <em>matching routes</em> are not limited to those. They
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accept all types that implement the <a href="https://docs.rs/dioxus-router-core/latest/dioxus_router_core/routes/trait.Matcher.html"><code>Matcher</code></a> trait.</p>
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<p>For example, you could (but probably shouldn't) implement a matcher, that
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matches all values with an even number of characters:</p>
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<pre><pre class="playground"><code class="language-rust no_run edition2021">
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<span class="boring">#![allow(unused)]
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</span><span class="boring">fn main() {
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</span><span class="boring">// Hidden lines (like this one) make the documentation tests work.
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</span><span class="boring">extern crate dioxus_router;
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</span><span class="boring">use dioxus_router::prelude::*;
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</span><span class="boring">
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</span>#[derive(Debug)]
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struct EvenMatcher;
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impl Matcher for EvenMatcher {
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fn matches(&self, value: &str) -> bool {
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value.len() % 2 == 0
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}
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}
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<span class="boring">}
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</span></code></pre></pre>
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