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

To use the writev function from the fs-extra library in TypeScript, you first need to install the library:

index.ts
npm install fs-extra
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Then you can import the writev function from fs-extra and use it like this:

index.ts
import * as fs from 'fs-extra';

const file = 'file.txt';
const buffer1 = Buffer.from('Hello, ');
const buffer2 = Buffer.from('World!');

fs.writev(file, [buffer1, buffer2], (err) => {
  if (err) {
    console.error(err);
  } else {
    console.log('Data written.');
  }
});
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In this example, file is the file name, buffer1 and buffer2 are the data buffers to be written to the file, and the callback function is called when the operation completes. The writev function takes an array of buffers as its second argument, and it writes the data to the file in the order they appear in the array.