Automatic Backbone Routing - automatically capture links with relative URLs and route them through your Backbone Router. This method does not break any fallback server-side routing, because you're still using real URLs, i.e. `<a href="/my/app/page/4">See?</a>`. If a link can't be handled by any of your routers, it will fall through so the browse…

backbone-auto-routing-example.html

...
<nav>
  <ul>
    <li>
      <a href="/my/app">Home</a>
    </li><li>
      <a href="/my/app/posts">Posts</a>
    </li><li>
      <a href="/my/app/posts/1">The First Post</a>
    </li>
  </ul>
</nav>
...

backbone-auto-routing-example.js

MyRouter = Backbone.Router.extend({
    routes: {
        'posts/:post_id': 'showPost',
        'posts': 'indexPosts',
        '': 'home'
    },
    
    ...
});
myRouter = new MyRouter();

// start Backbone.history - root is optional
Backbone.history.start({pushState: true, root: 'my/app'});

// save the root for slight performance improvement
var bbRoot = Backbone.history.root.replace(/^\//, '').replace(/\/$/, '');

// on every click, check if it's an href that can be handled by the router
$(document.body).on('click', 'a', function(event) {
    // clean leading/trailing slashes
    var href = $(this).attr('href').replace(/^\/+/, '').replace(/\/+$/, '');

    // only handle click if href contains backbone history root
    if (bbRootRegexp.test(href)) {
        href = href.replace(bbRootRegexp, '').replace(/^\/+/, '').replace(/\/+$/, '');

        _(Backbone.history.handlers).chain().pluck('route').each(function(route) {
            if (route.test(href)) {
                event.preventDefault();
                Backbone.history.navigate(href, {trigger: true});
            }
        });
    }
});

add at line 17 var bbRootRegexp = new RegExp(bbRoot)

Thanks it's work but if you refresh page you will get the 404

I found ! For apache server just add in .htaccess

RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_URI} !index RewriteRule (.*) index.html [L,QSA]