function isValidEmail(email) {
    const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
    return emailRegex.test(email);
}

function isDueDatePassed(dueDate) {
    const now = new Date();
    const dueDateTime = new Date(dueDate);
    return dueDateTime < now;
}

function isDatePassed(dateA, dateB) {
    const dueDateA = new Date(dateA);
    const dueDateB = new Date(dateB);
    return dueDateA < dueDateB;
}

export {isValidEmail, isDueDatePassed, isDatePassed};