Use global state with localStorage, sync between tabs

useLocalStorage.js

import { useEffect, useState } from "react";

const useLocalStorage = (key, initialValue) => {
    // State to store our value
    // Pass initial state function to useState so logic is only executed once
    const [storedValue, setStoredValue] = useState(() => {
        if (typeof window === "undefined") {
            return initialValue;
        }
        try {
            // Get from local storage by key
            const item = window.localStorage.getItem(key);
            // Parse stored json or if none return initialValue
            return item ? JSON.parse(item) : initialValue;
        } catch (error) {
            // If error also return initialValue
            console.log(error);
            return initialValue;
        }
    });
    // Return a wrapped version of useState's setter function that ...
    // ... persists the new value to localStorage.
    const setValue = (value) => {
        try {
            // Allow value to be a function so we have same API as useState
            const valueToStore =
                value instanceof Function ? value(storedValue) : value;
            // Save state
            setStoredValue(valueToStore);
            // Save to local storage
            if (typeof window !== "undefined") {
                window.localStorage.setItem(key, JSON.stringify(valueToStore));
            }
        } catch (error) {
            // A more advanced implementation would handle the error case
            console.log(error);
        }
    };

    // Sync localStorage between tabs
    useEffect(() => {
        const listener = (e) => {
            if (e.key === key) {
                setStoredValue(JSON.parse(e.newValue));
            }
        };
        window.addEventListener("storage", listener);
        return () => {
            window.removeEventListener("storage", listener);
        };
    }
        , [
            key,
            initialValue,
        ]);

    return [storedValue, setValue];
};

export default useLocalStorage;