021-01-13T16:00:00.000Z 日期格式转换

function rTime(date) {
    var json_date = new Date(date).toJSON();
    return new Date(new Date(json_date) + 8 * 3600 * 1000).toISOString().replace(/T/g, ' ').replace(/\.[\d]{3}Z/, '') 
}

或

function formatDateString(dateStr) {
const date = new Date(dateStr);

const year = date.getFullYear();
const month = String(date.getMonth() + 1).padStart(2, '0');
const day = String(date.getDate()).padStart(2, '0');
const hours = String(date.getHours()).padStart(2, '0');
const minutes = String(date.getMinutes()).padStart(2, '0');
const seconds = String(date.getSeconds()).padStart(2, '0');

return `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;
}