//using Node.js
//npm i @types/node
const fs = require("fs");

let path = './data';
//Asynchronously:
fs.mkdir(path, (err) => {
    if (err) 
        console.log("Error:", err);
    else
        console.log('successfully created!');
});

//Synchronously:
if (!fs.existsSync(path)){
    fs.mkdirSync(path);
}