document.write("CodeName=" + navigator.appCodeName + "<br />");
document.write("MinorVersion=" + navigator.appMinorVersion + "<br />");
document.write("Name=" + navigator.appName + "<br />");
document.write("Version=" + navigator.appVersion + "<br />");
document.write("CookieEnabled=" + navigator.cookieEnabled + "<br />");
document.write("CPUClass=" + navigator.cpuClass + "<br />");
document.write("OnLine=" + navigator.onLine + "<br />");
document.write("Platform=" + navigator.platform + "<br />");
document.write("UserAgent=" + navigator.userAgent + "<br />");
document.write("BrowserLanguage=" + navigator.browserLanguage + "<br />");
document.write("SystemLanguage=" + navigator.systemLanguage + "<br />");
document.write("UserLanguage=" + navigator.userLanguage + "<br />");

// 判断访问终端
var browser = {
  versions: function () {
      var u = navigator.userAgent, app = navigator.appVersion;
      return {
          trident: u.indexOf('Trident') > -1, // IE内核
          presto: u.indexOf('Presto') > -1, // opera内核
          webKit: u.indexOf('AppleWebKit') > -1, // 苹果、谷歌内核
          gecko: u.indexOf('Gecko') > -1 && u.indexOf('KHTML') == -1,// 火狐内核
          mobile: !!u.match(/AppleWebKit.*Mobile.*/), // 是否为移动终端
          ios: !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/), // ios终端
          android: u.indexOf('Android') > -1 || u.indexOf('Linux') > -1, // android终端或者uc浏览器
          iPhone: u.indexOf('iPhone') > -1 , // 是否为iPhone或者QQHD浏览器
          iPad: u.indexOf('iPad') > -1, // 是否iPad
          webApp: u.indexOf('Safari') == -1, // 是否web应该程序，没有头部与底部
          weixin: u.indexOf('MicroMessenger') > -1, // 是否微信 （2015-01-22新增）
          qq: u.match(/\sQQ/i) == " qq" // 是否QQ
      }
  }(),
  language:(navigator.browserLanguage || navigator.language).toLowerCase()
}

let arr = [5,6,4,3,9,2]
const arrMax = arr => Math.max(...arr)
const arrMin = arr => Math.min(...arr)
console.log(arrMax(arr)) // 9
console.log(arrMin(arr)) // 2

//阻止浏览器的默认行为 
function stopDefault( e ) { 
  //阻止默认浏览器动作(W3C)
  if ( e && e.preventDefault ) {
    e.preventDefault(); 
  }
  //IE中阻止函数器默认动作的方式 
  else {
    window.event.returnValue = false; 
  }
  return false; 
}

function stopBubble(e) { 
  //如果提供了事件对象，则这是一个非IE浏览器 
  if ( e && e.stopPropagation ) {
    // 因此它支持W3C的stopPropagation()方法 
    e.stopPropagation(); 
  }
  else {
    // 否则，我们需要使用IE的方式来取消事件冒泡 
    window.event.cancelBubble = true; 
  }
}

function findCookie (key) {
  let reg = new RegExp('(^| )' + key + '=([^;]*)(;|$)', 'i')
  let values = document.cookie.match(reg)
  return values !== null ? decodeURIComponent(values[2]) : null
}

function getCookies() {
  let cookie = document.cookie
  return cookie.split(';').map(e => {
    let cookieObj = {}
    cookieObj.key = e.split('=')[0]
    cookieObj.value = e.split('=')[1]
    return cookieObj
  })
}

function delCookie (name) {
  let exp = new Date()
  exp.setTime(exp.getTime() - 1)
  let cval = findCookie(name)
  cval !== null && (document.cookie = name + "=" + cval + ";expires=" + exp.toGMTString())
}

function getsec (str) {
  let str1 = str.substring(0, str.length - 1) * 1
  let str2 = str.substring(str.length - 1, str.length)
  return
  str2 === "s" && str1 * 1000 ||
    str2 === "h" && str1 * 60 * 60 * 1000 ||
    str2 === "d" && str1 * 24 * 60 * 60 * 1000
}
function setCookie (name, value, time) {
  let strsec = getsec(time)
  let exp = new Date()
  exp.setTime(exp.getTime() + strsec * 1)
  document.cookie = name + "=" + decodeURIComponent(value) + ";expires=" + exp.toGMTString()
}
setCookie('name', 'xiaoyu', '60s')

function getUrlParm (key) {
  let reg = new RegExp('(^|&)' + key + '=([^&]*)(&|$)', 'i')
  let values = window.location.search.substr(1).match(reg)
  return values !== null ? decodeURIComponent(values[2]) : null
}

function getUrlParams () {
  let url = location.search
  if (url) {
    let theRequestMap = new Map()
    if (url.indexOf('?') !== -1) {
      let str = url.substr(1)
      let strs = str.split('&')
      for (let i = 0; i < strs.length; i++) {
        theRequestMap[strs[i].split('=')[0]] = decodeURIComponent(strs[i].split('=')[1])
      }
    }
    return theRequestMap
  } else {
    return null
  }
}

localStorage.setItem('date', 20)
localStorage.getItem('date')
localStorage.removeItem('date')

/**
 * 获取友好的时间显示
 * @param {Date|number|string} time
 * > Date: 时间对象
 * > number: 时间戳
 * > string: 格式化的时间字符串，如'2017-10-01 18:00:00'
 * @param {boolean} 是否显示时间，默认false
 * @return {string} 友好的时间显示
 */
export default function (time, withTime = false) {
  let date = (time instanceof Date) ? time : (typeof time === 'number') ? new Date(time) : new Date((time || '').replace(/-/g, '/'))
  let diff = (((new Date()).getTime() - date.getTime()) / 1000)
  let dayDiff = Math.floor(diff / 86400)
  let isValidDate = Object.prototype.toString.call(date) === '[object Date]' && !isNaN(date.getTime())
  if (!isValidDate) {
    console.error('not a valid date')
  }
  const formatDate = function (date, withTime) {
    let today = new Date(date)
    let year = today.getFullYear()
    let month = ('0' + (today.getMonth() + 1)).slice(-2)
    let day = ('0' + today.getDate()).slice(-2)
    let hour = today.getHours()
    let minute = today.getMinutes()
    let second = today.getSeconds()
    return withTime ? `${year}-${month}-${day} ${hour}:${minute}:${second}` : `${year}-${month}-${day}`
  }
  if (isNaN(dayDiff) || dayDiff < 0 || dayDiff >= 30) {
    return formatDate(date, withTime)
  }
  /* eslint no-mixed-operators: 0 */
  return dayDiff === 0 && (
      diff < 60 && '刚刚' ||
      diff < 120 && '1分钟前' ||
      diff < 3600 && Math.floor(diff / 60) + '分钟前' ||
      diff < 7200 && '1小时前' ||
      diff < 86400 && Math.floor(diff / 3600) + '小时前') ||
    dayDiff === 1 && '昨天' ||
    dayDiff < 7 && dayDiff + '天前' ||
    dayDiff < 30 && Math.ceil(dayDiff / 7) + '周前'
}

/**
 * 格式化时间显示
 * @param {Date} date 需要格式化的时间
 * @param {string} fmt 时间格式化字符串
 * @return {string} 格式化后的字符串
 */
export default function (date, fmt = 'YYYY-MM-DD HH:mm:ss') {
  date = typeof date === 'number' ? new Date(date) : date
  var o = {
    'M+': date.getMonth() + 1,
    'D+': date.getDate(),
    'h+': date.getHours() % 12 === 0 ? 12 : date.getHours() % 12,
    'H+': date.getHours(),
    'm+': date.getMinutes(),
    's+': date.getSeconds(),
    'q+': Math.floor((date.getMonth() + 3) / 3),
    'S': date.getMilliseconds()
  }
  var week = {
    '0': '\u65e5',
    '1': '\u4e00',
    '2': '\u4e8c',
    '3': '\u4e09',
    '4': '\u56db',
    '5': '\u4e94',
    '6': '\u516d'
  }
  if (/(Y+)/.test(fmt)) {
    fmt = fmt.replace(RegExp.$1, (date.getFullYear() + '').substr(4 - RegExp.$1.length))
  }
  if (/(E+)/.test(fmt)) {
    fmt = fmt.replace(RegExp.$1, ((RegExp.$1.length > 1) ? (RegExp.$1.length > 2 ? '\u661f\u671f' : '\u5468') : '') + week[date.getDay() + ''])
  }
  for (var k in o) {
    if (new RegExp('(' + k + ')').test(fmt)) {
      fmt = fmt.replace(RegExp.$1, (RegExp.$1.length === 1) ? (o[k]) : (('00' + o[k]).substr(('' + o[k]).length)))
    }
  }
  return fmt
}