Interaction with Browser Cookie

Cookie.md

https://stackoverflow.com/questions/5639346/what-is-the-shortest-function-for-reading-a-cookie-by-name-in-javascript

function getCookieValue(a) {
    var b = document.cookie.match('(^|;)\\s*' + a + '\\s*=\\s*([^;]+)');
    return b ? b.pop() : '';
}

https://developer.mozilla.org/en-US/docs/Web/HTTP/Cookies#JavaScript_access_using_Document.cookie

function setCookie(key, value) {
    document.cookie = `${key}=${value}`;
}