JavaScript实现时间格式的切割与转换

 console.log(item.createTime,'切割前');
        item.createTime =   item.createTime ? item.createTime.split('T')[0].replace(/-/g, "/")  :   item.createTime         
       console.log(item.createTime,'切割后并转换格式');

function convertTimeFormat(isoTime) {
  const date = new Date(isoTime);
  const year = date.getFullYear();
  const month = (date.getMonth() + 1).toString().padStart(2, '0');
  const day = date.getDate().toString().padStart(2, '0');
  const hours = date.getHours().toString().padStart(2, '0');
  const minutes = date.getMinutes().toString().padStart(2, '0');
  const seconds = date.getSeconds().toString().padStart(2, '0');
   return `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;
}
        item.createTime =   item.createTime ? convertTimeFormat( item.createTime )  :   item.createTime 
          item.updateTime =  item.updateTime?  convertTimeFormat( item.updateTime)  : item.updateTime

const dateString = '2021-09-08'; // 替换为您的日期字符串

const date = new Date(dateString);
const timestamp = date.getTime();

console.log(timestamp); // 输出时间戳，例如：1631107200000

const timestamp = 1631107200000; // 替换为您的时间戳

const date = new Date(timestamp);
const year = date.getFullYear();
const month = String(date.getMonth() + 1).padStart(2, '0');
const day = String(date.getDate()).padStart(2, '0');
const dateString = `${year}-${month}-${day}`;

console.log(dateString); // 输出日期字符串，例如：2021-09-08

const timestamp = 1631109035000; // 替换为您的时间戳

const date = new Date(timestamp);
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');

console.log(year, month, day, hours, minutes, seconds);