使用JS和Laravel向现有cookie值添加价值

function addCookieValue(cookieName, newValue) {
    var cookieValue = getCookie(cookieName);
    if (cookieValue) {
        cookieValue += "," + newValue;
    } else {
        cookieValue = newValue;
    }
    setCookie(cookieName, cookieValue, 365);
}

function getCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for (var i = 0; i < ca.length; i++) {
        var c = ca[i];
        while (c.charAt(0) == ' ') c = c.substring(1, c.length);
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
    }
    return null;
}

function setCookie(name, value, days) {
    var expires = "";
    if (days) {
        var date = new Date();
        date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
        expires = "; expires=" + date.toUTCString();
    }
    document.cookie = name + "=" + (value || "") + expires + "; path=/";
}

addCookieValue('userPreferences', 'notifications:on');

use Illuminate\Support\Facades\Cookie;

public function updateCookie(Request $request)
{
    $cookieName = 'userPreferences';
    $newValue = 'notifications:on';

    $cookieValue = $request->cookie($cookieName);
    if ($cookieValue) {
        $cookieValue .= "," . $newValue;
    } else {
        $cookieValue = $newValue;
    }

    return response()->withCookie(cookie($cookieName, $cookieValue, 365));
}