实用的函数

// 判断手机号是否正确
export function isMobile (mobile) {
  let reg = /^(13[0-9]|14[0-9]|15[0-9]|16[0-9]|17[0-9]|18[0-9]|19[0-9])\d{8}$/
  return reg.test(mobile)
}

// 获取cookie
export function getCookie (name) {
  let arr = document.cookie.replace(/\s/g, '').split(';')
  for (let i = 0; i < arr.length; i++) {
    let tempArr = arr[i].split('=')
    if (tempArr[0] == name) {
      return decodeURIComponent(tempArr[1])
    }
  }
  return ''
}

// 设置cookie
export function setCookie (name, value, days) {
  let date = new Date()
  date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000))
  let expires = date.toUTCString()
  document.cookie = name + '=' + value + ';expires=' + expires + ';path=/;domain=.baidu.com'
}
// 设置cookie
export function setCookiesecond (name, value, second) {
  let date = new Date()
  date.setTime(date.getTime() + ( second* 1000))
  let expires = date.toUTCString()
  document.cookie = name + '=' + value + ';expires=' + expires + ';path=/;domain=.baidu.com'
}
// 移除cookie
export function removeCookie (name) {
  document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:00 GMT'
}

// 时间格式化
export function formatDate (date, fmt) {
  if (/(y+)/.test(fmt)) {
    fmt = fmt.replace(RegExp.$1,
      (date.getFullYear() + '').substr(4 - RegExp.$1.length))
  }
  let o = {
    'M+': date.getMonth() + 1,
    'd+': date.getDate(),
    'h+': date.getHours(),
    'm+': date.getMinutes(),
    's+': date.getSeconds()
  }
  for (let k in o) {
    if (new RegExp(`(${k})`).test(fmt)) {
      let str = o[k] + ''
      fmt = fmt.replace(RegExp.$1,
        (RegExp.$1.length === 1) ? str : padLeftZero(str))
    }
  }
  return fmt
}

function padLeftZero (str) {
  return ('00' + str).substr(str.length)
}

/**
 * 格式化时间字符串，防止解析出错
 * @param str
 * @returns {*}
 */
export function formatDateStr (str) {
  if (typeof (str) === 'string') {
    return str.replace(/-/g, '/')
  } else {
    return 0
  }
}

/**
 * 判断是否为微信
 * @returns {boolean}
 */
export function isWeiXin (req = '') {
  let ua
  if (req) {
    ua = req.headers['user-agent'].toLowerCase()
  } else {
    ua = navigator.userAgent.toLowerCase()
  }
  return ua.match(/MicroMessenger/i) == 'micromessenger'
}

/**
 * 判断是否是微信
 */
export function isQQ () {
  var ua = navigator.userAgent.toLowerCase()
  return ua.match(/QQ/i) + '' === 'qq'
}
/**
 * 解析url参数
 * @param param
 * @returns {*}
 */
export function getUrlParam (param) {
  let url = location.search // 获取url中"?"符后的字串
  let theRequest = {}
  if (url.indexOf('?') !== -1) {
    let str = url.substr(1)
    let strs = str.split('&')
    for (let i = 0; i < strs.length; i++) {
      theRequest[strs[i].split('=')[0]] = decodeURIComponent(
        strs[i].split('=')[1])
    }
  }
  if (theRequest[param]) {
    return theRequest[param]
  } else {
    return ''
  }
}

/**
 * 判断手机系统
 * @returns {string}
 */
export function mobileSystem () {
  if (/(iPhone|iPad|iPod|iOS)/i.test(navigator.userAgent)) {
    return 'ios'
  } else if (/(Android)/i.test(navigator.userAgent)) {
    return 'android'
  } else {
    return ''
  }
}

/**
 * 判断是否为Pc
 * @returns {boolean}
 */
export function isPc () {
  return !navigator.userAgent.match(
    /(phone|pad|pod|iPhone|iPod|ios|iPad|Android|Mobile|BlackBerry|IEMobile|MQQBrowser|JUC|Fennec|wOSBrowser|BrowserNG|WebOS|Symbian|Windows Phone)/i)

}
export function isUCBrowser() {
  return navigator.userAgent.includes('UCBrowser')
}

/**
 * 判断是否为蓝陌app
 * @returns {boolean}
 */
export function isMosoApp () {
  let ua = navigator.userAgent
  if (ua.match(/mosoteach-android/i)) {
    return true
  } else if (ua.match(/mosoteach-ios/i)) {
    return true
  } else {
    return false
  }
}