filtered-ls.js

const fs = require('fs');
const path = require('path')

filePath = process.argv[2]
extension = '.' + process.argv[3]

fs.readdir(filePath, function(err, lsContent){
    if (err) return console.error(err)
    lsContent = lsContent.filter(lsContent => path.extname(lsContent) == extension);
    for (let i = 0; i < lsContent.length; i++){
        console.log(lsContent[i])
    }
})