cookie.js

'use strict';

const ESCAPE_RE = /([\.$?*|{}\(\)\[\]\\\/\+^])/g;

function getCookie(name) {
    const regex = new RegExp('(?:^|; )' + name.replace(ESCAPE_RE, '\\$1') + '=([^;]*)');
    const matches = document.cookie.match(regex);
    return matches ? decodeURIComponent(matches[1]) : void 0;
}

function setCookie(name, value, options = {}) {
    if(options.expires && typeof options.expires === 'number') {
        let d = new Date();
        d.setTime(d.getTime() + options.expires * 1000);
        options.expires = d;
    }
    if(options.expires && options.expires.toUTCString) {
        options.expires = options.expires.toUTCString();
    }
    var updatedCookie = encodeURIComponent(name) + '=' + encodeURIComponent(value);
    for(let propName of Object.getOwnPropertyNames(options)) {
        updatedCookie += '; ' + propName;
        let propValue = options[propName];
        if(propValue !== true) {
            updatedCookie += '=' + propValue;
        }
    }
    document.cookie = updatedCookie;
}

function deleteCookie(name) {
    setCookie(name, '', {
        expires: -1
    });
}

module.exports = {
    getCookie,
    setCookie,
    deleteCookie
};