Cookie-like implementation of localStorage. You can use it as an alternative to cookies.

expiredStorage.js

/**
* Use the browser's local storage to store the data.
* You can optionally give an expiration date in seconds or timestamp.
**/
let cookies = {

    get: (key) => {
        if (!localStorage.getItem(key) || key === null) {
            return null;
        }

        try {
            var objectInStorage = JSON.parse(localStorage.getItem(key));
            if (objectInStorage.expiration < Date.now()) {
                return removeLocalStorage(key) ? null : objectInStorage.value;
            } else {
                try {
                    return objectInStorage.value;
                } catch (e) {
                    return null;
                }
            }
        } catch (e) {
            return localStorage.getItem(key);
        }
    },

    set: (key, value, expires = null) => {
        if (key === null) {
            return false;
        }

        if (!(expires === undefined || expires === null)) {
            expires = Math.abs(expires);
        }

        try {
            if (expires != undefined && expires != null) {
                let expirationTimestamp = expires < Date.now() ? Date.now() + expires*1000 : expires;
                localStorage.setItem(key, JSON.stringify({value:value, expiration: expirationTimestamp}));
            } else {
                localStorage.setItem(key, value);
            }
        } catch(e) {
            return false;
        }
        return true;
    },
    
    remove: (key) => {
        try {
            localStorage.removeItem(key);
        } catch (e) {
            return false;
        }
        return true;
    }
    
};

/**
===============================================
Usage
===============================================
**/

// No expiration date
cookies.set("ip", "192.168.0.1"); 

// Expiration in seconds
cookies.set("ip", "192.168.0.1", 1); // Expire after 1 second
cookies.set("ip", "192.168.0.1", 60); // Expire after 1 minute
cookies.set("ip", "192.168.0.1", 60*60); // Expire after 1 hour
cookies.set("ip", "192.168.0.1", 24*60*60); // Expire after 1 day
cookies.set("ip", "192.168.0.1", 365*24*60*60); // Expire after 365 days
cookies.set("ip", "192.168.0.1", 365*24*60*60); // Expire after 365 days
cookies.set("ip", "192.168.0.1", 365*24*60*60); // Expire after 365 days

// Timestamp based expiration
cookies.set("ip", "192.168.0.1", 1572466709); // Expire on 10/30/2019 @ 8:18pm (UTC)
cookies.set("ip", "192.168.0.1", 1605722400); // Expire on 11/18/2020 @ 6:00pm (UTC)

// -----------------------------------------

cookies.get("ip"); // 192.168.0.1 (or null if not set)

// -----------------------------------------

cookies.remove("ip"); // true if present, else false