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

To use the fchmod() function from the fs-extra package in JavaScript, you can follow these steps:

1. Install the package by running npm install fs-extra in your terminal.

2. Import the package using require:

const fse = require('fs-extra');
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3. Use the fchmod() function to modify the permissions of a file or directory:

const fileDescriptor = await fse.open('/path/to/file', 'r');
await fse.fchmod(fileDescriptor, 0o755);
await fse.close(fileDescriptor);
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In this example, we first open the file using fse.open(), which returns a file descriptor. We then pass the file descriptor and the desired permissions (in octal format, using the 0o prefix) to fse.fchmod(). Finally, we close the file descriptor using fse.close(). Note that fchmod() is an asynchronous function that returns a promise, so we need to use await to wait for the operation to complete before proceeding.