knockout-router

a router for knockout spa applications (a port of Backbone.Router with influences from Durandal)

How to Use

1. Include knockout.js.
2. Optionally include knockout-amd-helpers.js (https://github.com/rniemeyer/knockout-amd-helpers) to take advantage of external module/template loading.
3. Include knockout-history.js and knockout-router.js from this repo (supports commonjs, amd, or global).
4. Add route and/or router bindings to HTML markup.
5. Optionally call ko.router.configure(options) and pass in a custom options hash object.
6. Call ko.router.map(routeConfig) and pass in an array of routes.
7. Call ko.applyBindings(vm), add router property to your view model and set it to ko.router.vm if using the router to render your navigation links.
8. Call ko.router.init(), which starts the router and history tracking.

How to Define Routes

When calling ko.router.map you will pass in an array of route objects.

Required properties: route (string) defines the route or route pattern

Optional properties:

• module (string) will tell the router to add a module binding (requires knockout-amd-helpers)
• template (string) will tell the router to add a template binding (or override the module's template option)
• name (string) will give this route a name (if possible, name is generated from the route pattern)
• href (string) will set the route's href property, which can be used later for rendering a navigation layout
• nav (bool) when set to true will cause this route to appear in navigation using ko.router.vm.navRoutes
• callback (function) will be called with any route parameters when the route is activated

Examples of routes:

• { route: '' }
• { route: 'about-us', module: 'about', nav: true }
• { route: 'content(/:id)', module: 'content', href: 'content', nav: true } (optional parameter :id)
• { route: 'content/:id/deep-page', template: 'deep-page' } (required parameter :id)

Configuring the Router

Before defining the routes, make a call to ko.router.configure(options) and pass in custom options.

Options available:

• debug (bool), if true will log router events to console.debug.
• notify (callback function(fragment, query)) if specified will be called for every navigation event.
• pushState (bool) tell the router to use HTML5 pushState if supported, otherwise use hash-based url's.
• root (string) defaults to '/', set to alternate root if desired.

Using the Route binding

You can define new routes or hook to existing routes (if previously defined) using the route binding.

The elements will be displayed/hidden when the route is active/inactive.

<div style="display:none;" data-bind="route: '' ">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Sit in!</div>
<div style="display:none;" data-bind="route: 'article' ">
  Lorem ipsum dolor sit amet, consectetur adipisicing elit. Suscipit nostrum id hic consectetur. 
  Cumque ab fuga ex enim tenetur porro qui totam dignissimos dicta explicabo.
</div>

/* Optionally configure router settings */
ko.router.configure({
  debug: true,
  notify: function(fragment, query) { console.log(fragment, query); },
  pushState: true
});

var viewModel = {};
viewModel.router = ko.router.vm;
ko.applyBindings(vm);

/* Start the router */
ko.router.init();

Dynamic Navigation Links

Add a router property to your view model and set it to ko.router.vm.

Set nav property to true for all routes you want to appear in the navRoutes property of the router view model.

For complex route patterns, add a href property to the route to specific the location

<!-- show list of routes (where `nav === true`) -->
<nav>
  <ul data-bind="foreach: router.navRoutes">
    <li data-bind="css: { active: isActive }"><a data-bind="text: config.title, attr: { href: config.href }"></a></li>
  </ul>
</nav>

Using the Router Binding

<!-- add router binding to view -->
<div data-bind="router: {}"></div>

/* configure router */
ko.router.configure(options);

/* define routes */
ko.router.map([
  { route: '', module: 'home', title: 'Welcome', nav: true },
  { route: 'who-we-are', module: 'about', title: 'About Us', nav: true },
  { route: 'contact', module: 'contact', nav: true },
  { route: 'content/news/:id', module: 'news', title: 'The News' }
]);

/* handle unknown routes */
ko.router.mapNotFound({ callback: function(fragment, query) { console.log(fragment, query); } });

var vm = { router: ko.router.vm };
ko.applyBindings(vm);

ko.router.init();

ToDo

• Combine knockout-history.js and knockout-router.js into a single file
• Add ability for router binding to empty its contents when a route does not match
• Add observable property to notify when nagivating. (for progress bars/spinners)
• Use the visible binding for toggling route bounded elements
• Transition animations
• Add option to cache views
• Add ability to define child routes/routers

License

MIT https://github.com/alexbihary/knockout-router/blob/master/LICENSE