OzanKurt

let total = 0, amount, item;

for (item in localStorage) {
	amount = ((localStorage[item].length + item.length) * 2);
	total += amount;
}

console.log(`Total = ${(total / 1024).toFixed(2)}KB`);

OzanKurt

class Storage {
	get(item) {
		const request = new Promise((resolve, reject) => {
			let data = localStorage.getItem(item);
      console.log(`Start of promise`);
			(data) ? resolve(data) : reject();
		});

		request.then((data) => {
      console.log(`promise resolved`);