Getting Started #

Creating a Single-page Application with Kdu + Kdu Router feels natural: with Kdu.js, we are already composing our application with components. When adding Kdu Router to the mix, all we need to do is map our components to the routes and let Kdu Router know where to render them. Here's a basic example:

HTML #

<script src="https://unpkg.com/kdu@3"></script>
<script src="https://unpkg.com/kdu-router@4"></script>

<div id="app">
  <h1>Hello App!</h1>
  <p>
    <!-- use the router-link component for navigation. -->
    <!-- specify the link by passing the `to` prop. -->
    <!-- `<router-link>` will render an `<a>` tag with the correct `href` attribute -->
    <router-link to="/">Go to Home</router-link>
    <router-link to="/about">Go to About</router-link>
  </p>
  <!-- route outlet -->
  <!-- component matched by the route will render here -->
  <router-view></router-view>
</div>

router-link #

Note how instead of using regular a tags, we use a custom component router-link to create links. This allows Kdu Router to change the URL without reloading the page, handle URL generation as well as its encoding. We will see later how to benefit from these features.

router-view #

router-view will display the component that corresponds to the url. You can put it anywhere to adapt it to your layout.

JavaScript #

// 1. Define route components.
// These can be imported from other files
const Home = { template: '<div>Home</div>' }
const About = { template: '<div>About</div>' }

// 2. Define some routes
// Each route should map to a component.
// We'll talk about nested routes later.
const routes = [
  { path: '/', component: Home },
  { path: '/about', component: About },
]

// 3. Create the router instance and pass the `routes` option
// You can pass in additional options here, but let's
// keep it simple for now.
const router = KduRouter.createRouter({
  // 4. Provide the history implementation to use. We are using the hash history for simplicity here.
  history: KduRouter.createWebHashHistory(),
  routes, // short for `routes: routes`
})

// 5. Create and mount the root instance.
const app = Kdu.createApp({})
// Make sure to _use_ the router instance to make the
// whole app router-aware.
app.use(router)

app.mount('#app')

// Now the app has started!

By calling app.use(router), we get access to it as this.$router as well as the current route as this.$route inside of any component:

// Home.kdu
export default {
  computed: {
    username() {
      // We will see what `params` is shortly
      return this.$route.params.username
    },
  },
  methods: {
    goToDashboard() {
      if (isAuthenticated) {
        this.$router.push('/dashboard')
      } else {
        this.$router.push('/login')
      }
    },
  },
}

To access the router or the route inside the setup function, call the useRouter or useRoute functions. We will learn more about this in the Composition API

Throughout the docs, we will often use the router instance. Keep in mind that this.$router is exactly the same as directly using the router instance created through createRouter. The reason we use this.$router is because we don't want to import the router in every single component that needs to manipulate routing.