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+# Isomorphic (universal) routing with React and Express
+
+```js
+// src/history.js
+import createBrowserHistory from 'history/createBrowserHistory';
+export default createBrowserHistory();
+```
+
+```jsx
+// src/routes.js
+import React from 'react';
+import history from './history';
+
+function onClick(event) {
+  event.preventDefault(); // prevent full page reload
+  history.push(event.currentTarget.getAttribute('href')); // do SPA navigation
+}
+
+export default {
+  path: '/',
+  children: [
+    {
+      path: '/',
+      action() {
+        return {
+          title: 'Welcome!',
+          component: (
+            <main>
+              <h1>Hello, World!</h1>
+              <nav>
+                Navigation:
+                <ul>
+                  <li><a href="/" onClick={onClick}>Home</a></li>
+                  <li><a href="/about" onClick={onClick}>About Us</a></li>
+                  <li><a href="/users" onClick={onClick}>Users</a></li>
+                  <li><a href="/articles" onClick={onClick}>Articles</a></li>
+                  <li><a href="/404" onClick={onClick}>404</a></li>
+                </ul>
+              </nav>
+            </main>
+          ),
+        };
+      },
+    },
+    {
+      path: '/about',
+      action() {
+        return {
+          title: 'About Us',
+          component: <h1>About Us</h1>,
+        };
+      },
+    },
+    {
+      path: '/users',
+      children: [
+        {
+          path: '/',
+          async action() {
+            const users = await fetch('/api/users');
+            return {
+              title: 'Users',
+              component: <Users users={users} />,
+            };
+          },
+        },
+        {
+          path: '/:user',
+          async action({ params }) {
+            const user = await fetch(`/api/user/${params.user}`);
+            return {
+              title: user.name,
+              component: <User user={user} />,
+            };
+          },
+        }
+      ],
+    },
+    {
+      path: '/articles',
+      async action() {
+        const articles = await fetch(
+          'https://gist.githubusercontent.com/koistya/a32919e847531320675764e7308b796a' +
+          '/raw/fcbb12e60f8e664240c66bedd747978b16781231/articles.json'
+        );
+        return {
+          title: 'Articles',
+          component: (
+            <main>
+              <h1>Articles</h1>
+              <ul>
+                {articles.map(article =>
+                  <li><a href={article.url}>{article.title}</a></li>
+                )}
+              </ul>
+            </main>
+          ),
+        };
+      },
+    },
+    {
+      path: '*', // wildcard route (must go last)
+      action() {
+        return {
+          title: 'Page Not Found',
+          component: <h1>Not Found</h1>,
+        };
+      },
+    },
+  ],
+};
+```
+
+```js
+// src/client.js
+import UniversalRouter from 'universal-router';
+import ReactDOM from 'react-dom';
+import history from './history';
+import routes from './routes';
+
+function render(location) {
+  UniversalRouter.resolve(routes, location.pathname).then(route => {
+    document.title = route.title;
+    ReactDOM.render(route.component, document.body);
+  });
+}
+
+render(history.location); // initialize the app
+history.listen(location => render); // listen for client-side navigation
+```
+
+```js
+// src/server.js
+import 'node-fetch'; // Fetch polyfill
+import express from 'express';
+import UniversalRouter from 'universal-router';
+import ReactDOM from 'react-dom/server';
+import routes from './routes';
+
+const app = express();
+const port = 3000;
+
+app.get('*', (req, res, next) => {
+  UniversalRouter.resolve(routes, req.path).then(route => {
+    res.send(
+      `<!doctype html>
+      <html>
+        <head><title>${route.title}</title></head>
+        <body>${ReactDOM.renderToString(route.component)}</body>
+      </html>`
+    );
+  });
+});
+
+app.listen(port, () => {
+  console.log(`The server is running at http://localhost:${port}/`);
+});
+```
