Using a Node.js module in typescript

I'm trying to make use of this module in typescript https://www.npmjs.com/package/youtube-api but after I write the following code I receives Runtime errors: fs.readdSync is not function. It seems to come from the 'googleapis' package that is require on the very first line of the below

const Youtube = require("youtube-api")
    , fs = require("fs")
    , readJson = require("r-json")
    , Lien = require("lien")
    , Logger = require("bug-killer")
    , opn = require("opn")
    , prettyBytes = require("pretty-bytes")
   ;

via J.Rem