javascript function

simple-time-format

const REPLACE_REGEX = /(Y|M|D|H|I|S|T)/ig
export function timeFormat(unixTime, format = 'Y-M-D H:i:s') {
  var time = new Date(unixTime * 1000)
  var conf = {
    Y: time.getFullYear(),
    M: pad(time.getMonth() + 1), //月份 
    D: pad(time.getDate()), //日 
    H: pad(time.getHours()), //小时 
    I: pad(time.getMinutes()), //分 
    S: pad(time.getSeconds()), //秒 
    T: time.getTime()
  }
  return format.replace(REPLACE_REGEX, key => conf[key.toUpperCase()])
}


function pad(num){
  return num > 10 ? num : ('0' + num)
}

simple-timeago.js

/* eslint-disable */

var indexMapZh = '秒_分钟_小时_天_周_月_年'.split('_')
  // build-in locales: en & zh_CN
var locales = {
  'zh_CN': function (number, index) {
    if (index === 0) return ['刚刚', '片刻后']
    var unit = indexMapZh[parseInt(index / 2)]
    return [number + unit + '前', number + unit + '后']
  }
}
  // second, minute, hour, day, week, month, year(365 days)
var SEC_ARRAY = [60, 60, 24, 7, 365 / 7 / 12, 12]
var SEC_ARRAY_LEN = 6

// format Date / string / timestamp to Date instance.
function toDate (input) {
  if (input instanceof Date) return input
  if (!isNaN(input)) return new Date(toInt(input))
  if (/^\d+$/.test(input)) return new Date(toInt(input))
  input = (input || '').trim().replace(/\.\d+/, '') // remove milliseconds
    .replace(/-/, '/').replace(/-/, '/')
    .replace(/(\d)T(\d)/, '$1 $2').replace(/Z/, ' UTC') // 2017-2-5T3:57:52Z -> 2017-2-5 3:57:52UTC
    .replace(/([\+\-]\d\d)\:?(\d\d)/, ' $1$2') // -04:00 -> -0400
  return new Date(input)
}
// change f into int, remove Decimal. just for code compression
function toInt (f) {
  return parseInt(f)
}
// format the diff second to *** time ago, with setting locale
function formatDiff (diff) {
  var locale = 'zh_CN'
  var i = 0
  var agoin = diff < 0 ? 1 : 0 // timein or timeago
  diff = Math.abs(diff)

  for (; diff >= SEC_ARRAY[i] && i < SEC_ARRAY_LEN; i++) {
    diff /= SEC_ARRAY[i]
  }
  diff = toInt(diff)
  i *= 2

  if (diff > (i === 0 ? 9 : 1)) i += 1
  return locales[locale](diff, i)[agoin].replace('%s', diff);
}
// calculate the diff second between date to be formated an now date.

export function timeago (unix_time) {
  let diff = Date.now() / 1000 - unix_time
  return formatDiff(diff)
}