详解javascript常用工具类的封装

前言

因为工作中经常用到这些方法，所有便把这些方法进行了总结。

JavaScript 1. type 类型判断

isString (o) { //是否字符串
 return Object.prototype.toString.call(o).slice(8, -1) === 'String'
}
isNumber (o) { //是否数字
 return Object.prototype.toString.call(o).slice(8, -1) === 'Number'
}
isObj (o) { //是否对象
 return Object.prototype.toString.call(o).slice(8, -1) === 'Object'
}
isArray (o) { //是否数组
 return Object.prototype.toString.call(o).slice(8, -1) === 'Array'
}
isDate (o) { //是否时间
 return Object.prototype.toString.call(o).slice(8, -1) === 'Date'
}
isBoolean (o) { //是否boolean
 return Object.prototype.toString.call(o).slice(8, -1) === 'Boolean'
}
isFunction (o) { //是否函数
 return Object.prototype.toString.call(o).slice(8, -1) === 'Function'
}
isNull (o) { //是否为null
 return Object.prototype.toString.call(o).slice(8, -1) === 'Null'
}
isUndefined (o) { //是否undefined
 return Object.prototype.toString.call(o).slice(8, -1) === 'Undefined'
}
isFalse (o) {
 if (o == '' || o == undefined || o == null || o == 'null' || o == 'undefined' || o == 0 || o == false || o == NaN) return true
 return false
}
isTrue (o) {
 return !this.isFalse(o)
}
isIos () {
 var u = navigator.userAgent;
 if (u.indexOf('Android') > -1 || u.indexOf('Linux') > -1) {//安卓手机
   // return "Android";
   return false
 } else if (u.indexOf('iPhone') > -1) {//苹果手机
   // return "iPhone";
   return true
 } else if (u.indexOf('iPad') > -1) {//iPad
   // return "iPad";
   return false
 } else if (u.indexOf('Windows Phone') > -1) {//winphone手机
   // return "Windows Phone";
   return false
 }else{
   return false
 }
}
isPC () { //是否为PC端
 var userAgentInfo = navigator.userAgent;
 var Agents = ["Android", "iPhone",
       "SymbianOS", "Windows Phone",
       "iPad", "iPod"];
 var flag = true;
 for (var v = 0; v < Agents.length; v++) {
   if (userAgentInfo.indexOf(Agents[v]) > 0) {
     flag = false;
     break;
   }
 }
 return flag;
}
browserType(){
 var userAgent = navigator.userAgent; //取得浏览器的userAgent字符串
 var isOpera = userAgent.indexOf("Opera") > -1; //判断是否Opera浏览器
 var isIE = userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1 && !isOpera; //判断是否IE浏览器
 var isEdge = userAgent.indexOf("Edge") > -1; //判断是否IE的Edge浏览器
 var isFF = userAgent.indexOf("Firefox") > -1; //判断是否Firefox浏览器
 var isSafari = userAgent.indexOf("Safari") > -1 && userAgent.indexOf("Chrome") == -1; //判断是否Safari浏览器
 var isChrome = userAgent.indexOf("Chrome") > -1 && userAgent.indexOf("Safari") > -1; //判断Chrome浏览器
 if (isIE) {
   var reIE = new RegExp("MSIE (\\d+\\.\\d+);");
   reIE.test(userAgent);
   var fIEVersion = parseFloat(RegExp["$1"]);
   if(fIEVersion == 7) return "IE7"
   else if(fIEVersion == 8) return "IE8";
   else if(fIEVersion == 9) return "IE9";
   else if(fIEVersion == 10) return "IE10";
   else if(fIEVersion == 11) return "IE11";
   else return "IE7以下"//IE版本过低
 }

if (isFF) return "FF";
 if (isOpera) return "Opera";
 if (isEdge) return "Edge";
 if (isSafari) return "Safari";
 if (isChrome) return "Chrome";
}
checkStr (str, type) {
 switch (type) {
   case 'phone':  //手机号码
     return /^1[3|4|5|7|8][0-9]{9}$/.test(str);
   case 'tel':   //座机
     return /^(0\d{2,3}-\d{7,8})(-\d{1,4})?$/.test(str);
   case 'card':  //身份证
     return /^\d{15}|\d{18}$/.test(str);
   case 'pwd':   //密码以字母开头，长度在6~18之间，只能包含字母、数字和下划线
     return /^[a-zA-Z]\w{5,17}$/.test(str)
   case 'postal': //邮政编码
     return /[1-9]\d{5}(?!\d)/.test(str);
   case 'QQ':   //QQ号
     return /^[1-9][0-9]{4,9}$/.test(str);
   case 'email':  //邮箱
     return /^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/.test(str);
   case 'money':  //金额(小数点2位)
     return /^\d*(?:\.\d{0,2})?$/.test(str);
   case 'URL':   //网址
     return /(http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=％&:/~\+#]*[\w\-\@?^=％&/~\+#])?/.test(str)
   case 'IP':   //IP
     return /((?:(?:25[0-5]|2[0-4]\\d|[01]?\\d?\\d)\\.){3}(?:25[0-5]|2[0-4]\\d|[01]?\\d?\\d))/.test(str);
   case 'date':  //日期时间
     return /^(\d{4})\-(\d{2})\-(\d{2}) (\d{2})(?:\:\d{2}|:(\d{2}):(\d{2}))$/.test(str) || /^(\d{4})\-(\d{2})\-(\d{2})$/.test(str)
   case 'number': //数字
     return /^[0-9]$/.test(str);
   case 'english': //英文
     return /^[a-zA-Z]+$/.test(str);
   case 'chinese': //中文
     return /^[\u4E00-\u9FA5]+$/.test(str);
   case 'lower':  //小写
     return /^[a-z]+$/.test(str);
   case 'upper':  //大写
     return /^[A-Z]+$/.test(str);
   case 'HTML':  //HTML标记
     return /<("[^"]*"|'[^']*'|[^'">])*>/.test(str);
   default:
     return true;
 }
}

2. Date

/**
* 格式化时间
*
* @param {time} 时间
* @param {cFormat} 格式
* @return {String} 字符串
*
* @example formatTime('2018-1-29', '{y}/{m}/{d} {h}:{i}:{s}') // -> 2018/01/29 00:00:00
*/
formatTime(time, cFormat) {
 if (arguments.length === 0) return null
 if ((time + '').length === 10) {
   time = +time * 1000
 }
 var format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}', date
 if (typeof time === 'object') {
   date = time
 } else {
   date = new Date(time)
 }
 var formatObj = {
   y: date.getFullYear(),
   m: date.getMonth() + 1,
   d: date.getDate(),
   h: date.getHours(),
   i: date.getMinutes(),
   s: date.getSeconds(),
   a: date.getDay()
 }
 var time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {
   var 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
}
/**
* 返回指定长度的月份集合
*
* @param {time} 时间
* @param {len} 长度
* @param {direction} 方向： 1: 前几个月; 2: 后几个月; 3:前后几个月 默认 3
* @return {Array} 数组
*
* @example  getMonths('2018-1-29', 6, 1) // -> ["2018-1", "2017-12", "2017-11", "2017-10", "2017-9", "2017-8", "2017-7"]
*/
getMonths(time, len, direction) {
 var mm = new Date(time).getMonth(),
   yy = new Date(time).getFullYear(),
   direction = isNaN(direction) ? 3 : direction,
   index = mm;
 var cutMonth = function(index) {
   if ( index <= len && index >= -len) {
     return direction === 1 ? formatPre(index).concat(cutMonth(++index)):
       direction === 2 ? formatNext(index).concat(cutMonth(++index)):formatCurr(index).concat(cutMonth(++index))
   }
   return []
 }
 var formatNext = function(i) {
   var y = Math.floor(i/12),
     m = i％12
   return [yy+y + '-' + (m+1)]
 }
 var formatPre = function(i) {
   var y = Math.ceil(i/12),
     m = i％12
   m = m===0 ? 12 : m
   return [yy-y + '-' + (13 - m)]
 }
 var formatCurr = function(i) {
   var y = Math.floor(i/12),
     yNext = Math.ceil(i/12),
     m = i％12,
     mNext = m===0 ? 12 : m
   return [yy-yNext + '-' + (13 - mNext),yy+y + '-' + (m+1)]
 }
 // 数组去重
 var unique = function(arr) {
   if ( Array.hasOwnProperty('from') ) {
     return Array.from(new Set(arr));
   }else{
     var n = {},r=[];
     for(var i = 0; i < arr.length; i++){
       if (!n[arr[i]]){
         n[arr[i]] = true;
         r.push(arr[i]);
       }
     }
     return r;
   }
 }
 return direction !== 3 ? cutMonth(index) : unique(cutMonth(index).sort(function(t1, t2){
   return new Date(t1).getTime() - new Date(t2).getTime()
 }))
}
/**
* 返回指定长度的天数集合
*
* @param {time} 时间
* @param {len} 长度
* @param {direction} 方向： 1: 前几天; 2: 后几天; 3:前后几天 默认 3
* @return {Array} 数组
*
* @example date.getDays('2018-1-29', 6) // -> ["2018-1-26", "2018-1-27", "2018-1-28", "2018-1-29", "2018-1-30", "2018-1-31", "2018-2-1"]
*/
getDays(time, len, diretion) {
 var tt = new Date(time)
 var getDay = function(day) {
   var t = new Date(time)
   t.setDate(t.getDate() + day)
   var m = t.getMonth()+1
   return t.getFullYear()+'-'+m+'-'+t.getDate()
 }
 var arr = []
 if (diretion === 1) {
   for (var i = 1; i <= len; i++) {
     arr.unshift(getDay(-i))
   }
 }else if(diretion === 2) {
   for (var i = 1; i <= len; i++) {
     arr.push(getDay(i))
   }
 }else {
   for (var i = 1; i <= len; i++) {
     arr.unshift(getDay(-i))
   }
   arr.push(tt.getFullYear()+'-'+(tt.getMonth()+1)+'-'+tt.getDate())
   for (var i = 1; i <= len; i++) {
     arr.push(getDay(i))
   }
 }
 return diretion === 1 ? arr.concat([tt.getFullYear()+'-'+(tt.getMonth()+1)+'-'+tt.getDate()]) :
   diretion === 2 ? [tt.getFullYear()+'-'+(tt.getMonth()+1)+'-'+tt.getDate()].concat(arr) : arr
}
/**
* @param {s} 秒数
* @return {String} 字符串
*
* @example formatHMS(3610) // -> 1h0m10s
*/
formatHMS (s) {
 var str = ''
 if (s > 3600) {
   str = Math.floor(s/3600)+'h'+Math.floor(s％3600/60)+'m'+s％60+'s'
 }else if(s > 60) {
   str = Math.floor(s/60)+'m'+s％60+'s'
 }else{
   str = s％60+'s'
 }
 return str
}
/*获取某月有多少天*/
getMonthOfDay (time) {
 var date = new Date(time)
 var year = date.getFullYear()
 var mouth = date.getMonth() + 1
 var days

//当月份为二月时，根据闰年还是非闰年判断天数
 if (mouth == 2) {
   days = year ％ 4 == 0 ? 29 : 28
 } else if (mouth == 1 || mouth == 3 || mouth == 5 || mouth == 7 || mouth == 8 || mouth == 10 || mouth == 12) {
   //月份为：1,3,5,7,8,10,12 时，为大月.则天数为31；
   days = 31
 } else {
   //其他月份，天数为：30.
   days = 30
 }
 return days
}
/*获取某年有多少天*/
getYearOfDay (time) {
 var firstDayYear = this.getFirstDayOfYear(time);
 var lastDayYear = this.getLastDayOfYear(time);
 var numSecond = (new Date(lastDayYear).getTime() - new Date(firstDayYear).getTime())/1000;
 return Math.ceil(numSecond/(24*3600));
}
/*获取某年的第一天*/
getFirstDayOfYear (time) {
 var year = new Date(time).getFullYear();
 return year + "-01-01 00:00:00";
}
/*获取某年最后一天*/
getLastDayOfYear (time) {
 var year = new Date(time).getFullYear();
 var dateString = year + "-12-01 00:00:00";
 var endDay = this.getMonthOfDay(dateString);
 return year + "-12-" + endDay + " 23:59:59";
}
/*获取某个日期是当年中的第几天*/
getDayOfYear (time) {
 var firstDayYear = this.getFirstDayOfYear(time);
 var numSecond = (new Date(time).getTime() - new Date(firstDayYear).getTime())/1000;
 return Math.ceil(numSecond/(24*3600));
}
/*获取某个日期在这一年的第几周*/
getDayOfYearWeek (time) {
 var numdays = this.getDayOfYear(time);
 return Math.ceil(numdays / 7);
}

3. Array

/*判断一个元素是否在数组中*/
contains (arr, val) {
 return arr.indexOf(val) != -1 ? true : false;
}
/**
* @param {arr} 数组
* @param {fn} 回调函数
* @return {undefined}
*/
each (arr, fn) {
 fn = fn || Function;
 var a = [];
 var args = Array.prototype.slice.call(arguments, 1);
 for(var i = 0; i < arr.length; i++) {
   var res = fn.apply(arr, [arr[i], i].concat(args));
   if(res != null) a.push(res);
 }
}
/**
* @param {arr} 数组
* @param {fn} 回调函数
* @param {thisObj} this指向
* @return {Array}
*/
map (arr, fn, thisObj) {
 var scope = thisObj || window;
 var a = [];
 for(var i = 0, j = arr.length; i < j; ++i) {
   var res = fn.call(scope, arr[i], i, this);
   if(res != null) a.push(res);
 }
 return a;
}
/**
* @param {arr} 数组
* @param {type} 1：从小到大  2：从大到小  3：随机
* @return {Array}
*/
sort (arr, type = 1) {
 return arr.sort( (a, b) => {
   switch(type) {
     case 1:
       return a - b;
     case 2:
       return b - a;
     case 3:
       return Math.random() - 0.5;
     default:
       return arr;
   }
 })
}

/*去重*/
unique (arr) {
 if ( Array.hasOwnProperty('from') ) {
   return Array.from(new Set(arr));
 }else{
   var n = {},r=[];
   for(var i = 0; i < arr.length; i++){
     if (!n[arr[i]]){
       n[arr[i]] = true;
       r.push(arr[i]);
     }
   }
   return r;
 }
}

/*求两个集合的并集*/
union (a, b) {
 var newArr = a.concat(b);
 return this.unique(newArr);
}

/*求两个集合的交集*/
intersect (a, b) {
 var _this = this;
 a = this.unique(a);
 return this.map(a, function(o) {
   return _this.contains(b, o) ? o : null;
 });
}

/*删除其中一个元素*/
remove (arr, ele) {
 var index = arr.indexOf(ele);
 if(index > -1) {
   arr.splice(index, 1);
 }
 return arr;
}

/*将类数组转换为数组的方法*/
formArray (ary) {
 var arr = [];
 if(Array.isArray(ary)) {
   arr = ary;
 } else {
   arr = Array.prototype.slice.call(ary);
 };
 return arr;
}

/*最大值*/
max (arr) {
 return Math.max.apply(null, arr);
}

/*最小值*/
min (arr) {
 return Math.min.apply(null, arr);
}

/*求和*/
sum (arr) {
 return arr.reduce( (pre, cur) => {
   return pre + cur
 })
}

/*平均值*/
average (arr) {
 return this.sum(arr)/arr.length
}

4. String 字符串操作

/**
* 去除空格
* @param {str}
* @param {type}
*    type: 1-所有空格 2-前后空格 3-前空格 4-后空格
* @return {String}
*/
trim (str, type) {
 type = type || 1
 switch (type) {
   case 1:
     return str.replace(/\s+/g, "");
   case 2:
     return str.replace(/(^\s*)|(\s*$)/g, "");
   case 3:
     return str.replace(/(^\s*)/g, "");
   case 4:
     return str.replace(/(\s*$)/g, "");
   default:
     return str;
 }
}

/**
* @param {str}
* @param {type}
*    type: 1:首字母大写 2：首页母小写 3：大小写转换 4：全部大写 5：全部小写
* @return {String}
*/
changeCase (str, type) {
 type = type || 4
 switch (type) {
   case 1:
     return str.replace(/\b\w+\b/g, function (word) {
       return word.substring(0, 1).toUpperCase() + word.substring(1).toLowerCase();

});
   case 2:
     return str.replace(/\b\w+\b/g, function (word) {
       return word.substring(0, 1).toLowerCase() + word.substring(1).toUpperCase();
     });
   case 3:
     return str.split('').map( function(word){
       if (/[a-z]/.test(word)) {
         return word.toUpperCase();
       }else{
         return word.toLowerCase()
       }
     }).join('')
   case 4:
     return str.toUpperCase();
   case 5:
     return str.toLowerCase();
   default:
     return str;
 }
}

/*
 检测密码强度
*/
checkPwd (str) {
 var Lv = 0;
 if (str.length < 6) {
   return Lv
 }
 if (/[0-9]/.test(str)) {
   Lv++
 }
 if (/[a-z]/.test(str)) {
   Lv++
 }
 if (/[A-Z]/.test(str)) {
   Lv++
 }
 if (/[\.|-|_]/.test(str)) {
   Lv++
 }
 return Lv;
}

/*过滤html代码(把<>转换)*/
filterTag (str) {
 str = str.replace(/&/ig, "&amp;");
 str = str.replace(/</ig, "&lt;");
 str = str.replace(/>/ig, "&gt;");
 str = str.replace(" ", "&nbsp;");
 return str;
}

5. Number

/*随机数范围*/
random (min, max) {
 if (arguments.length === 2) {
   return Math.floor(min + Math.random() * ( (max+1) - min ))
 }else{
   return null;
 }

}

/*将阿拉伯数字翻译成中文的大写数字*/
numberToChinese (num) {
 var AA = new Array("零", "一", "二", "三", "四", "五", "六", "七", "八", "九", "十");
 var BB = new Array("", "十", "百", "仟", "萬", "億", "点", "");
 var a = ("" + num).replace(/(^0*)/g, "").split("."),
   k = 0,
   re = "";
 for(var i = a[0].length - 1; i >= 0; i--) {
   switch(k) {
     case 0:
       re = BB[7] + re;
       break;
     case 4:
       if(!new RegExp("0{4}//d{" + (a[0].length - i - 1) + "}$")
         .test(a[0]))
         re = BB[4] + re;
       break;
     case 8:
       re = BB[5] + re;
       BB[7] = BB[5];
       k = 0;
       break;
   }
   if(k ％ 4 == 2 && a[0].charAt(i + 2) != 0 && a[0].charAt(i + 1) == 0)
     re = AA[0] + re;
   if(a[0].charAt(i) != 0)
     re = AA[a[0].charAt(i)] + BB[k ％ 4] + re;
   k++;
 }

if(a.length > 1) // 加上小数部分(如果有小数部分)
 {
   re += BB[6];
   for(var i = 0; i < a[1].length; i++)
     re += AA[a[1].charAt(i)];
 }
 if(re == '一十')
   re = "十";
 if(re.match(/^一/) && re.length == 3)
   re = re.replace("一", "");
 return re;
}

/*将数字转换为大写金额*/
changeToChinese (Num) {
   //判断如果传递进来的不是字符的话转换为字符
   if(typeof Num == "number") {
     Num = new String(Num);
   };
   Num = Num.replace(/,/g, "") //替换tomoney()中的“,”
   Num = Num.replace(/ /g, "") //替换tomoney()中的空格
   Num = Num.replace(/￥/g, "") //替换掉可能出现的￥字符
   if(isNaN(Num)) { //验证输入的字符是否为数字
     //alert("请检查小写金额是否正确");
     return "";
   };
   //字符处理完毕后开始转换，采用前后两部分分别转换
   var part = String(Num).split(".");
   var newchar = "";
   //小数点前进行转化
   for(var i = part[0].length - 1; i >= 0; i--) {
     if(part[0].length > 10) {
       return "";
       //若数量超过拾亿单位，提示
     }
     var tmpnewchar = ""
     var perchar = part[0].charAt(i);
     switch(perchar) {
       case "0":
         tmpnewchar = "零" + tmpnewchar;
         break;
       case "1":
         tmpnewchar = "壹" + tmpnewchar;
         break;
       case "2":
         tmpnewchar = "贰" + tmpnewchar;
         break;
       case "3":
         tmpnewchar = "叁" + tmpnewchar;
         break;
       case "4":
         tmpnewchar = "肆" + tmpnewchar;
         break;
       case "5":
         tmpnewchar = "伍" + tmpnewchar;
         break;
       case "6":
         tmpnewchar = "陆" + tmpnewchar;
         break;
       case "7":
         tmpnewchar = "柒" + tmpnewchar;
         break;
       case "8":
         tmpnewchar = "捌" + tmpnewchar;
         break;
       case "9":
         tmpnewchar = "玖" + tmpnewchar;
         break;
     }
     switch(part[0].length - i - 1) {
       case 0:
         tmpnewchar = tmpnewchar + "元";
         break;
       case 1:
         if(perchar != 0) tmpnewchar = tmpnewchar + "拾";
         break;
       case 2:
         if(perchar != 0) tmpnewchar = tmpnewchar + "佰";
         break;
       case 3:
         if(perchar != 0) tmpnewchar = tmpnewchar + "仟";
         break;
       case 4:
         tmpnewchar = tmpnewchar + "万";
         break;
       case 5:
         if(perchar != 0) tmpnewchar = tmpnewchar + "拾";
         break;
       case 6:
         if(perchar != 0) tmpnewchar = tmpnewchar + "佰";
         break;
       case 7:
         if(perchar != 0) tmpnewchar = tmpnewchar + "仟";
         break;
       case 8:
         tmpnewchar = tmpnewchar + "亿";
         break;
       case 9:
         tmpnewchar = tmpnewchar + "拾";
         break;
     }
     var newchar = tmpnewchar + newchar;
   }
   //小数点之后进行转化
   if(Num.indexOf(".") != -1) {
     if(part[1].length > 2) {
       // alert("小数点之后只能保留两位,系统将自动截断");
       part[1] = part[1].substr(0, 2)
     }
     for(i = 0; i < part[1].length; i++) {
       tmpnewchar = ""
       perchar = part[1].charAt(i)
       switch(perchar) {
         case "0":
           tmpnewchar = "零" + tmpnewchar;
           break;
         case "1":
           tmpnewchar = "壹" + tmpnewchar;
           break;
         case "2":
           tmpnewchar = "贰" + tmpnewchar;
           break;
         case "3":
           tmpnewchar = "叁" + tmpnewchar;
           break;
         case "4":
           tmpnewchar = "肆" + tmpnewchar;
           break;
         case "5":
           tmpnewchar = "伍" + tmpnewchar;
           break;
         case "6":
           tmpnewchar = "陆" + tmpnewchar;
           break;
         case "7":
           tmpnewchar = "柒" + tmpnewchar;
           break;
         case "8":
           tmpnewchar = "捌" + tmpnewchar;
           break;
         case "9":
           tmpnewchar = "玖" + tmpnewchar;
           break;
       }
       if(i == 0) tmpnewchar = tmpnewchar + "角";
       if(i == 1) tmpnewchar = tmpnewchar + "分";
       newchar = newchar + tmpnewchar;
     }
   }
   //替换所有无用汉字
   while(newchar.search("零零") != -1)
     newchar = newchar.replace("零零", "零");
   newchar = newchar.replace("零亿", "亿");
   newchar = newchar.replace("亿万", "亿");
   newchar = newchar.replace("零万", "万");
   newchar = newchar.replace("零元", "元");
   newchar = newchar.replace("零角", "");
   newchar = newchar.replace("零分", "");
   if(newchar.charAt(newchar.length - 1) == "元") {
     newchar = newchar + "整"
   }
   return newchar;
 }

6. Http

/**
* @param {setting}
*/
ajax(setting){
 //设置参数的初始值
 var opts={
   method: (setting.method || "GET").toUpperCase(), //请求方式
   url: setting.url || "", // 请求地址
   async: setting.async || true, // 是否异步
   dataType: setting.dataType || "json", // 解析方式
   data: setting.data || "", // 参数
   success: setting.success || function(){}, // 请求成功回调
   error: setting.error || function(){} // 请求失败回调
 }

// 参数格式化
 function params_format (obj) {
   var str = ''
   for (var i in obj) {
     str += i + '=' + obj[i] + '&'
   }
   return str.split('').slice(0, -1).join('')
 }

// 创建ajax对象
 var xhr=new XMLHttpRequest();

// 连接服务器open(方法GET/POST，请求地址， 异步传输)
 if(opts.method == 'GET'){
   xhr.open(opts.method, opts.url + "?" + params_format(opts.data), opts.async);
   xhr.send();
 }else{
   xhr.open(opts.method, opts.url, opts.async);
   xhr.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
   xhr.send(opts.data);
 }

/*
 ** 每当readyState改变时，就会触发onreadystatechange事件
 ** readyState属性存储有XMLHttpRequest的状态信息
 ** 0 ：请求未初始化
 ** 1 ：服务器连接已建立
 ** 2 ：请求已接受
 ** 3 : 请求处理中
 ** 4 ：请求已完成，且相应就绪
 */
 xhr.onreadystatechange = function() {
   if (xhr.readyState === 4 && (xhr.status === 200 || xhr.status === 304)) {
     switch(opts.dataType){
       case "json":
         var json = JSON.parse(xhr.responseText);
         opts.success(json);
         break;
       case "xml":
         opts.success(xhr.responseXML);
         break;
       default:
         opts.success(xhr.responseText);
         break;
     }
   }
 }

xhr.onerror = function(err) {
   opts.error(err);
 }
}

/**
* @param {url}
* @param {setting}
* @return {Promise}
*/
fetch(url, setting) {
 //设置参数的初始值
 let opts={
   method: (setting.method || 'GET').toUpperCase(), //请求方式
   headers : setting.headers || {}, // 请求头设置
   credentials : setting.credentials || true, // 设置cookie是否一起发送
   body: setting.body || {},
   mode : setting.mode || 'no-cors', // 可以设置 cors, no-cors, same-origin
   redirect : setting.redirect || 'follow', // follow, error, manual
   cache : setting.cache || 'default' // 设置 cache 模式 (default, reload, no-cache)
 }
 let dataType = setting.dataType || "json", // 解析方式
   data = setting.data || "" // 参数

// 参数格式化
 function params_format (obj) {
   var str = ''
   for (var i in obj) {
     str += `${i}=${obj[i]}&`
   }
   return str.split('').slice(0, -1).join('')
 }

if (opts.method === 'GET') {
   url = url + (data?`?${params_format(data)}`:'')
 }else{
   setting.body = data || {}
 }

return new Promise( (resolve, reject) => {
   fetch(url, opts).then( async res => {
     let data = dataType === 'text' ? await res.text() :
       dataType === 'blob' ? await res.blob() : await res.json()
     resolve(data)
   }).catch( e => {
     reject(e)
   })
 })

}

7. DOM

$ (selector){
 var type = selector.substring(0, 1);
 if (type === '#') {
   if (document.querySelecotor) return document.querySelector(selector)
     return document.getElementById(selector.substring(1))

}else if (type === '.') {
   if (document.querySelecotorAll) return document.querySelectorAll(selector)
     return document.getElementsByClassName(selector.substring(1))
 }else{
   return document['querySelectorAll' ? 'querySelectorAll':'getElementsByTagName'](selector)
 }
}

/*检测类名*/
hasClass (ele, name) {
 return ele.className.match(new RegExp('(\\s|^)' + name + '(\\s|$)'));
}

/*添加类名*/
addClass (ele, name) {
 if (!this.hasClass(ele, name)) ele.className += " " + name;
}

/*删除类名*/
removeClass (ele, name) {
 if (this.hasClass(ele, name)) {
   var reg = new RegExp('(\\s|^)' + name + '(\\s|$)');
   ele.className = ele.className.replace(reg, '');
 }
}

/*替换类名*/
replaceClass (ele, newName, oldName) {
 this.removeClass(ele, oldName);
 this.addClass(ele, newName);
}

/*获取兄弟节点*/
siblings (ele) {
 console.log(ele.parentNode)
 var chid = ele.parentNode.children,eleMatch = [];
 for(var i = 0, len = chid.length; i < len; i ++){
   if(chid[i] != ele){
     eleMatch.push(chid[i]);
   }
 }
 return eleMatch;
}

/*获取行间样式属性*/
getByStyle (obj,name){
 if(obj.currentStyle){
   return obj.currentStyle[name];
 }else{
   return getComputedStyle(obj,false)[name];
 }
}

8. Storage 储存操作

class StorageFn {
 constructor () {
   this.ls = window.localStorage;
   this.ss = window.sessionStorage;
 }

/*-----------------cookie---------------------*/
 /*设置cookie*/
 setCookie (name, value, day) {
   var setting = arguments[0];
   if (Object.prototype.toString.call(setting).slice(8, -1) === 'Object'){
     for (var i in setting) {
       var oDate = new Date();
       oDate.setDate(oDate.getDate() + day);
       document.cookie = i + '=' + setting[i] + ';expires=' + oDate;
     }
   }else{
     var oDate = new Date();
     oDate.setDate(oDate.getDate() + day);
     document.cookie = name + '=' + value + ';expires=' + oDate;
   }

}

/*获取cookie*/
 getCookie (name) {
   var arr = document.cookie.split('; ');
   for (var i = 0; i < arr.length; i++) {
     var arr2 = arr[i].split('=');
     if (arr2[0] == name) {
       return arr2[1];
     }
   }
   return '';
 }

/*删除cookie*/
 removeCookie (name) {
   this.setCookie(name, 1, -1);
 }

/*-----------------localStorage---------------------*/
 /*设置localStorage*/
 setLocal(key, val) {
   var setting = arguments[0];
   if (Object.prototype.toString.call(setting).slice(8, -1) === 'Object'){
     for(var i in setting){
       this.ls.setItem(i, JSON.stringify(setting[i]))
     }
   }else{
     this.ls.setItem(key, JSON.stringify(val))
   }

}

/*获取localStorage*/
 getLocal(key) {
   if (key) return JSON.parse(this.ls.getItem(key))
   return null;

}

/*移除localStorage*/
 removeLocal(key) {
   this.ls.removeItem(key)
 }

/*移除所有localStorage*/
 clearLocal() {
   this.ls.clear()
 }

/*-----------------sessionStorage---------------------*/
 /*设置sessionStorage*/
 setSession(key, val) {
   var setting = arguments[0];
   if (Object.prototype.toString.call(setting).slice(8, -1) === 'Object'){
     for(var i in setting){
       this.ss.setItem(i, JSON.stringify(setting[i]))
     }
   }else{
     this.ss.setItem(key, JSON.stringify(val))
   }

}

/*获取sessionStorage*/
 getSession(key) {
   if (key) return JSON.parse(this.ss.getItem(key))
   return null;

}

/*移除sessionStorage*/
 removeSession(key) {
   this.ss.removeItem(key)
 }

/*移除所有sessionStorage*/
 clearSession() {
   this.ss.clear()
 }

}

9. Other 其它操作

/*获取网址参数*/
getURL(name){
 var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)");
 var r = window.location.search.substr(1).match(reg);
 if(r!=null) return r[2]; return null;
}

/*获取全部url参数,并转换成json对象*/
getUrlAllParams (url) {
 var url = url ? url : window.location.href;
 var _pa = url.substring(url.indexOf('?') + 1),
   _arrS = _pa.split('&'),
   _rs = {};
 for (var i = 0, _len = _arrS.length; i < _len; i++) {
   var pos = _arrS[i].indexOf('=');
   if (pos == -1) {
     continue;
   }
   var name = _arrS[i].substring(0, pos),
     value = window.decodeURIComponent(_arrS[i].substring(pos + 1));
   _rs[name] = value;
 }
 return _rs;
}

/*删除url指定参数，返回url*/
delParamsUrl(url, name){
 var baseUrl = url.split('?')[0] + '?';
 var query = url.split('?')[1];
 if (query.indexOf(name)>-1) {
   var obj = {}
   var arr = query.split("&");
   for (var i = 0; i < arr.length; i++) {
     arr[i] = arr[i].split("=");
     obj[arr[i][0]] = arr[i][1];
   };
   delete obj[name];
   var url = baseUrl + JSON.stringify(obj).replace(/[\"\{\}]/g,"").replace(/\:/g,"=").replace(/\,/g,"&");
   return url
 }else{
   return url;
 }
}

/*获取十六进制随机颜色*/
getRandomColor () {
 return '#' + (function(h) {
   return new Array(7 - h.length).join("0") + h;
 })((Math.random() * 0x1000000 << 0).toString(16));
}

/*图片加载*/
imgLoadAll(arr,callback){
 var arrImg = [];
 for (var i = 0; i < arr.length; i++) {
   var img = new Image();
   img.src = arr[i];
   img.onload = function(){
     arrImg.push(this);
     if (arrImg.length == arr.length) {
       callback && callback();
     }
   }
 }
}

/*音频加载*/
loadAudio(src, callback) {
 var audio = new Audio(src);
 audio.onloadedmetadata = callback;
 audio.src = src;
}

/*DOM转字符串*/
domToStirng(htmlDOM){
 var div= document.createElement("div");
 div.appendChild(htmlDOM);
 return div.innerHTML
}

/*字符串转DOM*/
stringToDom(htmlString){
 var div= document.createElement("div");
 div.innerHTML=htmlString;
 return div.children[0];
}

/**
* 光标所在位置插入字符，并设置光标位置
*
* @param {dom} 输入框
* @param {val} 插入的值
* @param {posLen} 光标位置处在 插入的值的哪个位置
*/
setCursorPosition (dom,val,posLen) {
 var cursorPosition = 0;
 if(dom.selectionStart){
   cursorPosition = dom.selectionStart;
 }
 this.insertAtCursor(dom,val);
 dom.focus();
 console.log(posLen)
 dom.setSelectionRange(dom.value.length,cursorPosition + (posLen || val.length));
}

/*光标所在位置插入字符*/
insertAtCursor(dom, val) {
 if (document.selection){
   dom.focus();
   sel = document.selection.createRange();
   sel.text = val;
   sel.select();
 }else if (dom.selectionStart || dom.selectionStart == '0'){
   let startPos = dom.selectionStart;
   let endPos = dom.selectionEnd;
   let restoreTop = dom.scrollTop;
   dom.value = dom.value.substring(0, startPos) + val + dom.value.substring(endPos, dom.value.length);
   if (restoreTop > 0){
     dom.scrollTop = restoreTop;
   }
   dom.focus();
   dom.selectionStart = startPos + val.length;
   dom.selectionEnd = startPos + val.length;
 } else {
   dom.value += val;
   dom.focus();
 }
}

CSS 1. pc-reset PC样式初始化

/* normalize.css */

html {
line-height: 1.15;
/* 1 */
-ms-text-size-adjust: 100％;
/* 2 */
-webkit-text-size-adjust: 100％;
/* 2 */
}

body {
margin: 0;
}

article,
aside,
footer,
header,
nav,
section {
display: block;
}

h1 {
font-size: 2em;
margin: 0.67em 0;
}

figcaption,
figure,
main {
/* 1 */
display: block;
}

figure {
margin: 1em 40px;
}

hr {
box-sizing: content-box;
/* 1 */
height: 0;
/* 1 */
overflow: visible;
/* 2 */
}

pre {
font-family: monospace, monospace;
/* 1 */
font-size: 1em;
/* 2 */
}

a {
background-color: transparent;
/* 1 */
-webkit-text-decoration-skip: objects;
/* 2 */
}

abbr[title] {
border-bottom: none;
/* 1 */
text-decoration: underline;
/* 2 */
text-decoration: underline dotted;
/* 2 */
}

b,
strong {
font-weight: inherit;
}

b,
strong {
font-weight: bolder;
}

code,
kbd,
samp {
font-family: monospace, monospace;
/* 1 */
font-size: 1em;
/* 2 */
}

dfn {
font-style: italic;
}

mark {
background-color: #ff0;
color: #000;
}

small {
font-size: 80％;
}

sub,
sup {
font-size: 75％;
line-height: 0;
position: relative;
vertical-align: baseline;
}

sub {
bottom: -0.25em;
}

sup {
top: -0.5em;
}

audio,
video {
display: inline-block;
}

audio:not([controls]) {
display: none;
height: 0;
}

img {
border-style: none;
}

svg:not(:root) {
overflow: hidden;
}

button,
input,
optgroup,
select,
textarea {
font-family: sans-serif;
/* 1 */
font-size: 100％;
/* 1 */
line-height: 1.15;
/* 1 */
margin: 0;
/* 2 */
}

button,
input {
/* 1 */
overflow: visible;
}

button,
select {
/* 1 */
text-transform: none;
}

button,
html [type="button"],

/* 1 */

[type="reset"],
[type="submit"] {
-webkit-appearance: button;
/* 2 */
}

button::-moz-focus-inner,
[type="button"]::-moz-focus-inner,
[type="reset"]::-moz-focus-inner,
[type="submit"]::-moz-focus-inner {
border-style: none;
padding: 0;
}

button:-moz-focusring,
[type="button"]:-moz-focusring,
[type="reset"]:-moz-focusring,
[type="submit"]:-moz-focusring {
outline: 1px dotted ButtonText;
}

fieldset {
padding: 0.35em 0.75em 0.625em;
}

legend {
box-sizing: border-box;
/* 1 */
color: inherit;
/* 2 */
display: table;
/* 1 */
max-width: 100％;
/* 1 */
padding: 0;
/* 3 */
white-space: normal;
/* 1 */
}

progress {
display: inline-block;
/* 1 */
vertical-align: baseline;
/* 2 */
}

textarea {
overflow: auto;
}

[type="checkbox"],
[type="radio"] {
box-sizing: border-box;
/* 1 */
padding: 0;
/* 2 */
}

[type="number"]::-webkit-inner-spin-button,
[type="number"]::-webkit-outer-spin-button {
height: auto;
}

[type="search"] {
-webkit-appearance: textfield;
/* 1 */
outline-offset: -2px;
/* 2 */
}

[type="search"]::-webkit-search-cancel-button,
[type="search"]::-webkit-search-decoration {
-webkit-appearance: none;
}

::-webkit-file-upload-button {
-webkit-appearance: button;
/* 1 */
font: inherit;
/* 2 */
}

details,

/* 1 */

menu {
display: block;
}

summary {
display: list-item;
}

canvas {
display: inline-block;
}

template {
display: none;
}

[hidden] {
display: none;
}

/* reset */

html,
body,
h1,
h2,
h3,
h4,
h5,
h6,
div,
dl,
dt,
dd,
ul,
ol,
li,
p,
blockquote,
pre,
hr,
figure,
table,
caption,
th,
td,
form,
fieldset,
legend,
input,
button,
textarea,
menu {
margin: 0;
padding: 0;
box-sizing: border-box;
}

2. Phone-reset

/* normalize.css */

html {
line-height: 1.15;
/* 1 */
-ms-text-size-adjust: 100％;
/* 2 */
-webkit-text-size-adjust: 100％;
/* 2 */
}

body {
margin: 0;
}

article,
aside,
footer,
header,
nav,
section {
display: block;
}

h1 {
font-size: 2em;
margin: 0.67em 0;
}

figcaption,
figure,
main {
/* 1 */
display: block;
}

figure {
margin: 1em 40px;
}

hr {
box-sizing: content-box;
/* 1 */
height: 0;
/* 1 */
overflow: visible;
/* 2 */
}

pre {
font-family: monospace, monospace;
/* 1 */
font-size: 1em;
/* 2 */
}

a {
background-color: transparent;
/* 1 */
-webkit-text-decoration-skip: objects;
/* 2 */
}

abbr[title] {
border-bottom: none;
/* 1 */
text-decoration: underline;
/* 2 */
text-decoration: underline dotted;
/* 2 */
}

b,
strong {
font-weight: inherit;
}

b,
strong {
font-weight: bolder;
}

code,
kbd,
samp {
font-family: monospace, monospace;
/* 1 */
font-size: 1em;
/* 2 */
}

dfn {
font-style: italic;
}

mark {
background-color: #ff0;
color: #000;
}

small {
font-size: 80％;
}

sub,
sup {
font-size: 75％;
line-height: 0;
position: relative;
vertical-align: baseline;
}

sub {
bottom: -0.25em;
}

sup {
top: -0.5em;
}

audio,
video {
display: inline-block;
}

audio:not([controls]) {
display: none;
height: 0;
}

img {
border-style: none;
}

svg:not(:root) {
overflow: hidden;
}

button,
input,
optgroup,
select,
textarea {
font-family: sans-serif;
/* 1 */
font-size: 100％;
/* 1 */
line-height: 1.15;
/* 1 */
margin: 0;
/* 2 */
}

button,
input {
/* 1 */
overflow: visible;
}

button,
select {
/* 1 */
text-transform: none;
}

button,
html [type="button"],

/* 1 */

[type="reset"],
[type="submit"] {
-webkit-appearance: button;
/* 2 */
}

button::-moz-focus-inner,
[type="button"]::-moz-focus-inner,
[type="reset"]::-moz-focus-inner,
[type="submit"]::-moz-focus-inner {
border-style: none;
padding: 0;
}

button:-moz-focusring,
[type="button"]:-moz-focusring,
[type="reset"]:-moz-focusring,
[type="submit"]:-moz-focusring {
outline: 1px dotted ButtonText;
}

fieldset {
padding: 0.35em 0.75em 0.625em;
}

legend {
box-sizing: border-box;
/* 1 */
color: inherit;
/* 2 */
display: table;
/* 1 */
max-width: 100％;
/* 1 */
padding: 0;
/* 3 */
white-space: normal;
/* 1 */
}

progress {
display: inline-block;
/* 1 */
vertical-align: baseline;
/* 2 */
}

textarea {
overflow: auto;
}

[type="checkbox"],
[type="radio"] {
box-sizing: border-box;
/* 1 */
padding: 0;
/* 2 */
}

[type="number"]::-webkit-inner-spin-button,
[type="number"]::-webkit-outer-spin-button {
height: auto;
}

[type="search"] {
-webkit-appearance: textfield;
/* 1 */
outline-offset: -2px;
/* 2 */
}

[type="search"]::-webkit-search-cancel-button,
[type="search"]::-webkit-search-decoration {
-webkit-appearance: none;
}

::-webkit-file-upload-button {
-webkit-appearance: button;
/* 1 */
font: inherit;
/* 2 */
}

details,

/* 1 */

menu {
display: block;
}

summary {
display: list-item;
}

canvas {
display: inline-block;
}

template {
display: none;
}

[hidden] {
display: none;
}

/* reset */

html,
body,
h1,
h2,
h3,
h4,
h5,
h6,
div,
dl,
dt,
dd,
ul,
ol,
li,
p,
blockquote,
pre,
hr,
figure,
table,
caption,
th,
td,
form,
fieldset,
legend,
input,
button,
textarea,
menu {
margin: 0;
padding: 0;
box-sizing: border-box;
}

html,
body {
/* 禁止选中文本 */
-webkit-user-select: none;
user-select: none;
font: Oswald, 'Open Sans', Helvetica, Arial, sans-serif
}

/* 禁止长按链接与图片弹出菜单 */

a,
img {
-webkit-touch-callout: none;
}

/*ios android去除自带阴影的样式*/

a,
input {
-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

input[type="text"] {
-webkit-appearance: none;
}

3. 公共样式提取

/* 禁止选中文本 */
.usn{
 -webkit-user-select:none;
 -moz-user-select:none;
 -ms-user-select:none;
 -o-user-select:none;
 user-select:none;
}
/* 浮动 */
.fl { float: left; }
.fr { float: right; }
.cf { zoom: 1; }
.cf:after {
 content:".";
 display:block;
 clear:both;
 visibility:hidden;
 height:0;
 overflow:hidden;
}

/* 元素类型 */
.db { display: block; }
.dn { display: none; }
.di { display: inline }
.dib {display: inline-block;}
.transparent { opacity: 0 }

/*文字排版、颜色*/
.f12 { font-size:12px }
.f14 { font-size:14px }
.f16 { font-size:16px }
.f18 { font-size:18px }
.f20 { font-size:20px }
.fb { font-weight:bold }
.fn { font-weight:normal }
.t2 { text-indent:2em }
.red,a.red { color:#cc0031 }
.darkblue,a.darkblue { color:#039 }
.gray,a.gray { color:#878787 }
.lh150 { line-height:150％ }
.lh180 { line-height:180％ }
.lh200 { line-height:200％ }
.unl { text-decoration:underline; }
.no_unl { text-decoration:none; }
.tl { text-align: left; }
.tc { text-align: center; }
.tr { text-align: right; }
.tj { text-align: justify; text-justify: inter-ideograph; }
.wn { /* 强制不换行 */
 word-wrap:normal;
 white-space:nowrap;
}
.wb { /* 强制换行 */
 white-space:normal;
 word-wrap:break-word;
 word-break:break-all;
}
.wp { /* 保持空白序列*/
 overflow:hidden;text-align:left;white-space:pre-wrap;word-wrap:break-word;word-break:break-all;
}
.wes { /* 多出部分用省略号表示 , 用于一行 */
 overflow:hidden;
 word-wrap:normal;
 white-space:nowrap;
 text-overflow:ellipsis;
}
.wes-2 { /* 适用于webkit内核和移动端 */
 display: -webkit-box;
 -webkit-box-orient: vertical;
 -webkit-line-clamp: 2;
 overflow: hidden;
}
.wes-3 {
 display: -webkit-box;
 -webkit-box-orient: vertical;
 -webkit-line-clamp: 3;
 overflow: hidden;
}
.wes-4 {
 display: -webkit-box;
 -webkit-box-orient: vertical;
 -webkit-line-clamp: 4;
 overflow: hidden;
}

/* 溢出样式 */
.ofh { overflow: hidden; }
.ofs {overflow: scroll; }
.ofa {overflow: auto; }
.ofv {overflow: visible; }

/* 定位方式 */
.ps {position: static; }
.pr {position: relative;zoom:1; }
.pa {position: absolute; }
.pf {position: fixed; }

/* 垂直对齐方式 */
.vt {vertical-align: top; }
.vm {vertical-align: middle; }
.vb {vertical-align: bottom; }

/* 鼠标样式 */
.csd {cursor: default; }
.csp {cursor: pointer; }
.csh {cursor: help; }
.csm {cursor: move; }

/* flex布局 */
.df-sb {
 display:flex;
 align-items: center;
 justify-content: space-between;
}
.df-sa {
 display:flex;
 align-items: center;
 justify-content: space-around;
}

/* 垂直居中 */
.df-c {
 display: flex;
 align-items: center;
 justify-content: center;
}
.tb-c {
 text-align:center;
 display:table-cell;
 vertical-align:middle;
}
.ts-c {
 position: absolute;
 left: 50％; top: 50％;
 transform: translate(-50％, -50％);
}
.ts-mc {
 position: absolute;
 left: 0;right: 0;
 bottom: 0; top: 0;
 margin: auto;
}

/* 辅助 */
.mask-fixed-wrapper {
 width: 100％;
 height: 100％;
 position: fixed;
 left:0;top:0;
 background: rgba(0, 0, 0, 0.65);
 z-index: 999;
}
.bg-cover {
 background-size: cover;
 background-repeat: no-repeat;
 background-position: center center;
}
.bg-cover-all {
 background-size: 100％ 100％;
 background-repeat: no-repeat;
 background-position: center center;
}

以上都是经常用到的方法

来源：https://segmentfault.com/a/1190000013041329