react router
npm install react-router-dom
react router
import React from "react";
import {
BrowserRouter as Router,
Switch,
Route,
Link
} from "react-router-dom";
export default function App() {
return (
<Router>
<div>
<nav>
<ul>
<li>
<Link to="/">Home</Link>
</li>
<li>
<Link to="/about">About</Link>
</li>
<li>
<Link to="/users">Users</Link>
</li>
</ul>
</nav>
{/* A <Switch> looks through its children <Route>s and
renders the first one that matches the current URL. */}
<Switch>
<Route path="/about">
<About />
</Route>
<Route path="/users">
<Users />
</Route>
<Route path="/">
<Home />
</Route>
</Switch>
</div>
</Router>
);
}
function Home() {
return <h2>Home</h2>;
}
function About() {
return <h2>About</h2>;
}
function Users() {
return <h2>Users</h2>;
}
router react
npm install react-router-dom
react router
import React from "react";
import {
BrowserRouter as Router,
Switch,
Route,
Link,
useRouteMatch,
useParams
} from "react-router-dom";
export default function App() {
return (
<Router>
<div>
<ul>
<li>
<Link to="/">Home</Link>
</li>
<li>
<Link to="/about">About</Link>
</li>
<li>
<Link to="/topics">Topics</Link>
</li>
</ul>
<Switch>
<Route path="/about">
<About />
</Route>
<Route path="/topics">
<Topics />
</Route>
<Route path="/">
<Home />
</Route>
</Switch>
</div>
</Router>
);
}
function Home() {
return <h2>Home</h2>;
}
function About() {
return <h2>About</h2>;
}
function Topics() {
let match = useRouteMatch();
return (
<div>
<h2>Topics</h2>
<ul>
<li>
<Link to={`${match.url}/components`}>Components</Link>
</li>
<li>
<Link to={`${match.url}/props-v-state`}>
Props v. State
</Link>
</li>
</ul>
{/* The Topics page has its own <Switch> with more routes
that build on the /topics URL path. You can think of the
2nd <Route> here as an "index" page for all topics, or
the page that is shown when no topic is selected */}
<Switch>
<Route path={`${match.path}/:topicId`}>
<Topic />
</Route>
<Route path={match.path}>
<h3>Please select a topic.</h3>
</Route>
</Switch>
</div>
);
}
function Topic() {
let { topicId } = useParams();
return <h3>Requested topic ID: {topicId}</h3>;
}
react router
// React Router 5
import React from "react";
import { BrowserRouter, Link, Route, Switch } from 'react-router-dom'
export default () => {
return (
// Router
<BrowserRouter>
<div>
{/* Nav */}
<nav>
<ul>
<li><Link to="/">Home</Link></li>
<li><Link to="/about">About</Link></li>
<li><Link to="/team">Team</Link></li>
</ul>
</nav>
{/* Switch */}
<Switch>
<Route exact path='/' component={Home} />
<Route path='/about' component={About} />
<Route path='/team' component={Team} />
</Switch>
</div>
</BrowserRouter>
);
}
// You can think of these components as "pages"
// in your app.
let Home = () => <h2>Home</h2>;
let Team = () => <h2>Team</h2>;
let About = () => <h2>About</h2>;
// This site has 3 pages, all of which are rendered
// dynamically in the browser (not server rendered).
//
// Although the page does not ever refresh, notice how
// React Router keeps the URL up to date as you navigate
// through the site. This preserves the browser history,
// making sure things like the back button and bookmarks
// work properly.
{/*
A <Switch> looks through all its children <Route>
elements and renders the first one whose path
matches the current URL. Use a <Switch> any time
you have multiple routes, but you want only one
of them to render at a time
*/}
router react
npm install -g create-react-app
create-react-app demo-app
cd demo-app
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