生成uuid

export  function guid() {
    return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
        var r = Math.random() * 16 | 0,
            v = c == 'x' ? r : (r & 0x3 | 0x8);
        return v.toString(16);
    });
}

function UUID (){
  var s = [];
  var hexDigits = "0123456789abcdef";
  for (var i = 0; i < 36; i++) {
    s[i] = hexDigits.substr(Math.floor(Math.random() * 0x10), 1);
  }
  s[14] = "4"; // bits 12-15 of the time_hi_and_version field to 0010
  s[19] = hexDigits.substr((s[19] & 0x3) | 0x8, 1); // bits 6-7 of the clock_seq_hi_and_reserved to 01
  s[8] = s[13] = s[18] = s[23] = "-";

  var uuid = s.join("");
  return uuid;
}

隐藏手机号

filterTel(tel) {
      if (tel && tel.length == 11) {
        let phone = tel;
        let myphone = phone.substr(3, 4);
        phone = phone.replace(myphone, "****");
        return phone;
      }
      return tel;
    }

身份证隐藏年月日

function formatidcard(idcard) {
    // 15位身份证举例：130503 670401 001的含义; 13为河北，05为邢台，03为桥西区，出 生日期为1967年4月1日，顺序号为001。
    if(idcard.length == 15){
        return idcard.replace(/(\d{6})\d{6}(\d{3})/, "$1******$2");
    } else {
        return idcard.replace(/(\d{5})\d{6}(\d{6})/, "$1******$2");
    }
}

判断是否是微信

 function isWeixin() {
    var ua = navigator.userAgent.toLowerCase();
    if(ua.match(/MicroMessenger/i)=="micromessenger") {
        return true;
    } else {
        return false;
    }
}

移动端浏览器内核判断

function browserVersions(){
                      var u = navigator.userAgent, app = navigator.appVersion;
                      return {         //移动终端浏览器版本信息
                          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
                      };
              }

一些日期相关的方法

// 获取年加减
export function nowDate(e) {
  let d = new Date();
  let m = d.getMonth() + 1;
  let date = d.getDate();
  m = m > 9 ? m : '0' + m;
  date = date > 9 ? date : '0' + date;
  if (e) {
    return (d.getFullYear() + e) + '/' + m + '/' + date;
  } else {
    return d.getFullYear() + '/' + m + '/' + date;
  }
}
// 日期格式化
export function parseTime(time, cFormat) {
  if (arguments.length === 0) {
    return null
  }
  const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'
  let date
  if (typeof time === 'object') {
    date = time
  } else {
    if (typeof time == 'number') {
      if(('' + time).length === 10){
        time = parseInt(time) * 1000
      }
    } else if (time.indexOf('-') != -1) {
      time = time.replace(/\-/g, '/');
    }
    date = new Date(time)
  }
  const formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay()
  }
  const time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {
    let value = formatObj[key]
    if (key === 'a') return ['一', '二', '三', '四', '五', '六', '日'][value - 1]
    if (result.length > 0 && value < 10) {
      value = '0' + value
    }
    return value || 0
  })
  return time_str
}

// 获取本周第i天的日期
export function getWeek(i,formate='-') {
  var now = new Date();
  var firstDay = new Date(now - (now.getDay() - 1) * 86400000);
  firstDay.setDate(firstDay.getDate() + i);
  let mon = Number(firstDay.getMonth()) + 1;
  return firstDay.getFullYear() + formate + mon + formate + firstDay.getDate();
}


// 获取当前月的第一天和最后一天
export function getMonthDate(num=0){
  let date = new Date();
  let currentMon = date.getMonth();
  date.setMonth(currentMon+num,1);
  let startDate = parseTime(date,'{y}-{m}-{d}');
  date.setMonth(currentMon+1+num,0);
  let endDate = parseTime(date,'{y}-{m}-{d}');
  return {
    startDate,
    endDate
  };
}


// 加减天
export function addDay(nowDate,num=0){
   let now = nowDate.getTime();
   now += num*24*3600*1000;
   let date = parseTime(new Date(now),'{y}-{m}-{d}');
   return date;
}