how to use the realpath function from the fs-extra library in typescript

To use the realpath function from the fs-extra library in TypeScript, you should first install the fs-extra package and make sure that you have the necessary @types package installed.

Assuming that you have already installed fs-extra and its corresponding @types package, you can then import the realpath function from the library and use it in your TypeScript code like this:

index.ts
import { realpath } from 'fs-extra';

async function resolvePath(path: string): Promise<string> {
  const resolvedPath = await realpath(path);
  return resolvedPath;
}

// Example usage
resolvePath('/usr/bin').then(console.log); // Output: /private/usr/bin (on macOS)
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In the above example, we define an async function resolvePath that takes a string path as its input parameter and returns a Promise that resolves to the resolved path of the given input path. We use the await keyword to wait for the realpath function to resolve the path asynchronously.

Note that the realpath function returns a Promise that resolves to the resolved path, so you should wrap the function call in an async function and use await to get the resolved path.