How does Nuxt.js routing system work and how is it different from Vue Router?

Nuxt.js has a built-in file system-based routing system that encapsulates and extends Vue Router, providing a more concise way to define routes.

How the routing system works:

1. Convention-based routing

   • Nuxt.js automatically scans the file structure under the pages directory and generates corresponding route configurations based on file paths
   • No need to manually configure a router.js file, reducing configuration complexity

2. File naming rules

   • Basic routes: pages/index.vue corresponds to the / path
   • Nested routes: pages/user/profile.vue corresponds to the /user/profile path
   • Dynamic routes: Use underscore prefix, e.g., pages/user/_id.vue corresponds to /user/:id path
   • Nested dynamic routes: e.g., pages/user/_id/comments.vue corresponds to /user/:id/comments path

3. Route parameter retrieval

   • Get route parameters in components via $route.params
   • Support for validating route parameters through the validate method

4. Route navigation

   • Use <nuxt-link> component for declarative navigation
   • Use this.$router.push() for programmatic navigation

Key differences from Vue Router:

1. Route generation method

   • Vue Router: Requires manual configuration of route rules
   • Nuxt.js: Automatically generates routes based on file system

2. Route file structure

   • Vue Router: Usually concentrated in a single router.js file
   • Nuxt.js: Distributed in the file structure of the pages directory

3. Layout system

   • Vue Router: Requires manual configuration of layout components
   • Nuxt.js: Built-in layout system managed through the layouts directory

4. Middleware support

   • Vue Router: Uses route guards
   • Nuxt.js: Provides a more powerful middleware system supporting global, layout, and page-level middleware

5. Preloading functionality

   • Nuxt.js provides route preloading functionality to improve user experience

Advanced routing features:

1. Nested routes

   • Create directories with the same name as parent components and add _slug.vue etc. files inside

2. Dynamic routes

   • Use _ prefix to create dynamic route parameters
   • Support parameter format validation through the validate method

3. Route transition effects

   • Built-in support for page transition animations

4. Route meta information

   • Set page title, description, and other meta information through the component's head method

Best practices:

• Organize the pages directory structure rationally to keep routing logic clear
• Add parameter validation when using dynamic routes
• Use middleware to handle common logic such as permission validation
• Use layout components appropriately to reduce code duplication