next.js Type checking TypeScript

Next.js has built-in support for TypeScript, allowing you to write your Next.js applications using TypeScript and perform type checking.

To enable TypeScript support in a Next.js project, you need to set up the necessary dependencies and configuration. Here are the steps to do that:

Create a new Next.js project using TypeScript template:
```
npx create-next-app@latest --typescript
```
Once the project is created, you can start writing your components and pages using TypeScript. All the files in the project will have the .tsx extension by default.
Next.js will automatically perform type checking when you run the development server. It uses the TypeScript compiler to check for errors and provide type information.
To manually run the type checking, you can use the TypeScript compiler (usually invoked with tsc command) along with your custom configuration. Create a tsconfig.json file in the project root directory with your desired TypeScript configuration options. For example:
```
{
  "compilerOptions": {
    "strict": true,
    "esModuleInterop": true
  }
}
```
Running the TypeScript compiler with the configuration will check for type errors in your codebase:
```
tsc
```

Next.js also provides additional features for static generation and server-side rendering with TypeScript. You can find more information about Next.js with TypeScript at their official documentation: https://nextjs.org/docs/basic-features/typescript

Remember to install necessary TypeScript type definitions if you are using external libraries. You can use the @types/* packages from npm to install TypeScript type definitions for specific libraries.