Read and write cookies

read.cookie.js

const readCookie = name => {
    const cookies = {};
    let split;
    let nameValue;
    let i;

    if (document.cookie && document.cookie != '') {
        split = document.cookie.split(';');
        for (i = 0; i < split.length; i = i + 1) {
            nameValue = split[i].split('=');
            nameValue[0] = nameValue[0].replace(/^ /, '');

            cookies[decodeURIComponent(nameValue[0])] = decodeURIComponent(nameValue[1]);
        }
    }
    return cookies[name];
};

write.cookie.js

const createCookie = (name, value, days) => {
    let date;
    let expires;

    if (days) {
        date = new Date();
        date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
        expires = `; expires=${date.toGMTString()}`;
    } else {
        expires = '';
    }

    document.cookie = `${name}=${value}${expires}; path=/;`;
};