毫秒装换日期格式

// 参数number为毫秒时间戳，format为需要转换成的日期格式
export function formatTime (number, format) {
  let time = new Date(number)
  let newArr = []
  let formatArr = ['Y', 'M', 'D', 'h', 'm', 's', 'i']
  newArr.push(time.getFullYear())
  newArr.push(formatNumber(time.getMonth() + 1))
  newArr.push(formatNumber(time.getDate()))

  newArr.push(formatNumber(time.getHours()))
  newArr.push(formatNumber(time.getMinutes()))
  newArr.push(formatNumber(time.getSeconds()))
  newArr.push(formatNumber(time.getMilliseconds()))

  for (let i in newArr) {
    format = format.replace(formatArr[i], newArr[i])
  }
  return format
}

// 使用
formatTime(500000, 'Y-M-D h:m:s')