Vue.js Router

What is Vue Router?

Vue Router is the official routing library for Vue.js that enables developers to create single-page applications (SPAs) with dynamic navigation between different views or components. It allows you to define routes, map them to components, and manage the application's URL.

How do you install Vue Router in a Vue.js project?

You can install Vue Router in a Vue.js project using npm. Run the following command in your terminal:

npm install vue-router

How do you create a basic router instance?

You create a router instance by importing Vue Router and defining your routes as an array of objects. Each route object contains a path and a component.

import Vue from 'vue';
import Router from 'vue-router';
import Home from './components/Home.vue';
import About from './components/About.vue';

Vue.use(Router);

const router = new Router({
  routes: [
    { path: '/', component: Home },
    { path: '/about', component: About }
  ]
});

How do you integrate Vue Router with a Vue instance?

You integrate Vue Router with a Vue instance by passing the router instance to the router option when creating the Vue instance.

new Vue({
  el: '#app',
  router, // Integrating the router instance
  template: '<App/>',
  components: { App }
});

How do you navigate between routes in Vue Router?

You can navigate between routes using the router-link component or programmatically using the this.$router.push() method.

<router-link to="/">Home</router-link>
<router-link to="/about">About</router-link>

<script>
this.$router.push('/about'); // Programmatic navigation
</script>

What are route parameters in Vue Router?

Route parameters allow you to define dynamic segments in your routes that can be accessed as part of the URL. They are defined in the route path using a colon :, and you can access their values within the component using this.$route.params.

const router = new Router({
  routes: [
    { path: '/user/:id', component: User }
  ]
});

// Inside the User component
export default {
  mounted() {
    console.log('User ID:', this.$route.params.id);
  }
};

How do you implement nested routes in Vue Router?

You can implement nested routes by defining child routes within the parent route's configuration. Each child route can have its own components and paths.

const router = new Router({
  routes: [
    {
      path: '/user/:id',
      component: User,
      children: [
        { path: 'profile', component: UserProfile },
        { path: 'posts', component: UserPosts }
      ]
    }
  ]
});

What are named routes in Vue Router?

Named routes allow you to assign a name to a route, making it easier to navigate to that route programmatically or with router-link. You can specify a name in the route configuration and use it in navigation.

const router = new Router({
  routes: [
    { path: '/about', component: About, name: 'about' }
  ]
});

// Navigation using the named route
this.$router.push({ name: 'about' });

How do you handle route guards in Vue Router?

Route guards are functions that can be added to routes to control access based on specific conditions. You can use global guards, per-route guards, or component guards to perform checks before entering a route.

// Global before guard
router.beforeEach((to, from, next) => {
  // Check for authentication
  const isAuthenticated = false; // Replace with actual auth check
  if (to.matched.some(record => record.meta.requiresAuth) && !isAuthenticated) {
    next({ name: 'login' }); // Redirect to login
  } else {
    next(); // Allow navigation
  }
});

How do you create a router-view in Vue.js?

You create a <router-view> component in your application template, which acts as a placeholder for the matched component for the current route. The router-view will render the component defined in the route configuration.

<div id="app">
  <router-view></router-view> 
</div>

<script>
new Vue({
  el: '#app',
  router,
  template: '<App/>',
  components: { App }
});
</script>