how to use the readvsync function from fs-extra in javascript

To use the readvSync function from fs-extra in JavaScript, first, install the package in your project:

npm install fs-extra
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Then, require the fs-extra module in your code:

index.tsx
const fse = require('fs-extra');
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Finally, use the readvSync function to read data from a file into an array of buffers using the following syntax:

index.tsx
const buffers = [];
const fd = fse.openSync('/path/to/file', 'r');
const size = fse.fstatSync(fd).size;
const bytesRead = fse.readvSync(fd, buffers, 0, size, 0);
fse.closeSync(fd);
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In this example, the readvSync function reads the contents of the file specified by the path /path/to/file into an array of buffers specified in buffers.

The function takes five arguments:

1. fd: The file descriptor of the file to be read.
2. buffers: An array of buffers to which the data will be read.
3. position: The offset from the beginning of the file where reading should start.
4. length: The number of bytes to read.
5. offset: The offset within the buffers array where data should be written.

After calling readvSync, it returns the total number of bytes read as bytesRead.

Note: readvSync is a synchronous function, meaning the program will block until the entire operation is complete. This can cause performance issues if used on large files in a single thread context. Consider using readv for asynchronous file reading.