小程序格式化时间

/*
* 毫秒时间戳转时间
* datetime string 毫秒
* return Y/m/d h:m:s 2021/07/19 10:03:02
*/
function formatTime(datetime) {
  var date = new Date(datetime);
  var year = date.getFullYear()
  var month = date.getMonth() + 1
  var day = date.getDate()
  var hour = date.getHours()
  var minute = date.getMinutes()
  var second = date.getSeconds()
  return [year, month, day].map(formatNumber).join('/') + ' ' + [hour, minute, second].map(formatNumber).join(':')
}
/** 
 * 时间戳转化为自定义时间格式
 * number int 时间戳 
 * format string 返回自定义格式,与formateArr保持一致 
 * return 自定义年月日时分秒格式 
*/
function formatDate(number, format) {
  var formateArr = ['Y', 'M', 'D', 'h', 'm', 's'];
  var returnArr = [];
  var date = new Date(number * 1000);
  returnArr.push(date.getFullYear());
  returnArr.push(formatNumber(date.getMonth() + 1));
  returnArr.push(formatNumber(date.getDate()));
  returnArr.push(formatNumber(date.getHours()));
  returnArr.push(formatNumber(date.getMinutes()));
  returnArr.push(formatNumber(date.getSeconds()));
  for (var i in returnArr) {
    format = format.replace(formateArr[i], returnArr[i]);
  }
  return format;
}
function formatNumber(n) {
    n = n.toString()
    return n[1] ? n : '0' + n
}
module.exports = {
    formatTime: formatTime,
    formatTimeTwo: formatTimeTwo  
}
// 在js 的 中调用如下，首先要先引入 until js
import time from '../../utils/util.js';
var datetime = 1488481383;
console.log(time.formatTime(datetime*1000));
console.log(time.formatDate(datetime,,'Y/M/D h:m:s'));

得到的效果如下：
2017/03/03 03:03:03
2017/03/03 03:03:03