封裝時間轉換爲2019/03/24 00:11:26函數

1. 封裝：

function formatNumber (n) {
  const str = n.toString()
  return str[1] ? str : `0${str}`
}

export function formatTime (date) {  //1.時間轉換函數，轉換爲年月日 日分秒，如2019/03/24 00:11:26
  const year = date.getFullYear()
  const month = date.getMonth() + 1
  const day = date.getDate()

  const hour = date.getHours()
  const minute = date.getMinutes()
  const second = date.getSeconds()

  const t1 = [year, month, day].map(formatNumber).join('/')
  const t2 = [hour, minute, second].map(formatNumber).join(':')

  return `${t1} ${t2}`
}

export default {
  formatNumber,
  formatTime
}

2. 使用：

console.log(formatTime(new Date()))  //輸出2019/03/24 00:11:26