Renames files in a given folder to a random string

app.js

const fs = require("fs")
const crypto = require("crypto")
const folder = "./Sort"
const files = fs.readdirSync(folder)

for (var i = 0; i < files.length; i++) {
	let oldname = files[i]
	let newname = ((crypto.randomBytes(16).toString("hex")) + "." + (oldname.substring(oldname.lastIndexOf(".") + 1)))
	
	fs.rename(`${folder}/${oldname}`, `${folder}/${newname}`, (error) => {
		if (error) console.log(`error: ${error}`)
	})
}