js 判断日期是否为今天

function isToday(date) {
    const today = new Date();
    return date.getDate() === today.getDate() &&
           date.getMonth() === today.getMonth() &&
           date.getFullYear() === today.getFullYear();
}

// 使用示例
const someDate = new Date('2023-10-05'); // 假设这是你要检查的日期
if (isToday(someDate)) {
    console.log('这个日期是今天！');
} else {
    console.log('这个日期不是今天。');
}

function isTodayUTC(date) {
    const today = new Date();
    return date.getUTCDate() === today.getUTCDate() &&
           date.getUTCMonth() === today.getUTCMonth() &&
           date.getUTCFullYear() === today.getUTCFullYear();
}

function isValidDate(dateStr) {
    const date = new Date(dateStr);
    return !isNaN(Date.parse(dateStr));
}