在JavaScript中将日期格式更改为特定格式

function formatDate(date, format) {
    const d = new Date(date);
    const year = d.getFullYear();
    const month = ('0' + (d.getMonth() + 1)).slice(-2); // 月份从0开始
    const day = ('0' + d.getDate()).slice(-2);

    return format.replace('YYYY', year)
                 .replace('MM', month)
                 .replace('DD', day);
}

const currentDate = new Date();
const formattedDate = formatDate(currentDate, 'YYYY-MM-DD');
console.log(formattedDate); // 输出类似 "2023-10-05"

function formatDateUTC(date, format) {
    const d = new Date(date.toISOString());
    const year = d.getUTCFullYear();
    const month = ('0' + (d.getUTCMonth() + 1)).slice(-2);
    const day = ('0' + d.getUTCDate()).slice(-2);

    return format.replace('YYYY', year)
                 .replace('MM', month)
                 .replace('DD', day);
}

const currentDateUTC = new Date();
const formattedDateUTC = formatDateUTC(currentDateUTC, 'YYYY-MM-DD');
console.log(formattedDateUTC); // 输出类似 "2023-10-05"