Từ hàm IIFE tới Module Pattern

https://www.youtube.com/watch?v=uqSijKe2Ouw&list=PLmSai9ZRK6uyZ7L8k10pOSvQRhZbg1W4w&index=4

var Module = (function module(x) {
    let private = "Day la private variable " + x;
    function privateFunc() {
        console.log("Day la private function");
    }
    return {
        publicData: private,
        publicFunc: privateFunc
    }
})('aaaaaa');
console.log(Module.publicData);