js 判断cookie是否过期

function getCookie(name) {
    const value = `; ${document.cookie}`;
    const parts = value.split(`; ${name}=`);
    if (parts.length === 2) return parts.pop().split(';').shift();
}

function isCookieExpired(cookieName) {
    const cookie = getCookie(cookieName);
    if (!cookie) return true; // Cookie不存在

    const [value, expires] = cookie.split(';').map(part => part.trim());
    if (!expires.startsWith('Expires=')) return false; // 没有过期时间

    const expireDate = new Date(expires.split('=')[1]);
    return expireDate < new Date();
}

// 使用示例
const cookieName = 'myCookie';
if (isCookieExpired(cookieName)) {
    console.log('Cookie已过期');
} else {
    console.log('Cookie未过期');
}