Cookie Reusable Component in ES6

app.js

import { cookies } from './lib/cookies';
import modal from './lib/modal';
$(document).ready(function() {
  	modal(cookies);
});

cookies.js

const cookies = {
	name: "username",
	timeInDays: 1,
	hello: function(name) {
		return 'Hello ' + name;
	},
	setCookie: function(cname, cvalue, exdays) {
		const d = new Date();
		d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
		let expires = "expires="+d.toUTCString();
		document.cookie = cname + "=" + cvalue + ";" + "path=/";
		// document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
	},
	getCookie: function(cname) {
		let name = cname + "=";
		let ca = document.cookie.split(';');
		for(let i = 0; i < ca.length; i++) {
		    let c = ca[i];
		    while (c.charAt(0) == ' ') {
		      	c = c.substring(1);
		    }
		    if (c.indexOf(name) == 0) {
		      	return c.substring(name.length, c.length);
		    }
		}
		return "";
	},
	checkCookie: function () {
		let user = this.getCookie(this.name);
		if (user != "") {
		    	alert("Welcome again " + user);
		} else {
		    user = prompt("Please enter your name:", "");
		    if (user != "" && user != null) {
		      	this.setCookie("username", user, this.timeInDays);
		    }
		}
	}	
}
export { cookies }

modal.js

export default function(cookies) {
	cookies.checkCookie();
}