Q61. How do you implement nested layouts in App Router?
Nested layouts are implemented by creating `layout.js` files in different route segments. Layouts are nested automatically based on the folder structure. ``` app/ ├── lay...
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Q62. What are route handlers vs API routes in App Router?
In the App Router, API routes are now called "Route Handlers" and use the `route.js` file convention instead of the pages-based approach. **Pages Router (API Routes)**: `...
Q63. How do you handle streaming and suspense in App Router?
The App Router has built-in support for streaming and React Suspense, allowing you to progressively render and stream UI to the client. ```jsx // app/page.js import { Sus...
Q64. What is React Server Components (RSC) in App Router?
React Server Components (RSC) are a new React feature that allows components to be rendered on the server. In the App Router, components are Server Components by default....
Q65. How do you handle error boundaries in App Router?
You can create error boundaries using the `error.js` file in a route segment. This file defines UI to render when an error is thrown within that segment. ```jsx // app/er...
Q66. How do you handle internationalization (i18n) in Next.js with the App Router?
Next.js provides built-in support for internationalization (i18n) in the App Router. You can configure i18n settings in the `next.config.js` file. ```js // next.config.js...
Q67. What are the best practices of Next.js API routes?
- Use proper HTTP methods (GET, POST, PUT, DELETE) for different operations. - Validate and sanitize input data to prevent security vulnerabilities. - Handle errors grace...
Q68. How to use proper HTTP methods in Next.js API routes?
In Next.js API routes, you can define different functions for each HTTP method (GET, POST, PUT, DELETE) within the same route file. This allows you to handle different ty...
Q69. How to validate and sanitize input data in Next.js API routes?
To validate and sanitize input data in Next.js API routes, you can use libraries like `Joi`, `Yup`, or `validator.js`. These libraries help ensure that the data received ...
Q70. How to handle errors in Next.js API routes?
To handle errors in Next.js API routes, you can use try-catch blocks to catch exceptions and return appropriate HTTP status codes and error messages. This ensures that cl...