DataTable转为TXT文档（复制datatable结构）
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2022-07-23
JavaScript常用方法封装
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' }
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' }
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' }
isRegExp (o) { //是否正则 return Object.prototype.toString.call(o).slice(8, -1) === 'RegExp' }
isError (o) { //是否错误对象 return Object.prototype.toString.call(o).slice(8, -1) === 'Error' }
isSymbol (o) { //是否Symbol函数 return Object.prototype.toString.call(o).slice(8, -1) === 'Symbol' }
isPromise (o) { //是否Promise对象 return Object.prototype.toString.call(o).slice(8, -1) === 'Promise' }
isSet (o) { //是否Set对象 return Object.prototype.toString.call(o).slice(8, -1) === 'Set' }
isFalse (o) {
if (!o || o === 'null' || o === 'undefined' || 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 isIE11 = userAgent.indexOf('Trident') > -1 && userAgent.indexOf("rv:11.0") > -1;
var isEdge = userAgent.indexOf("Edge") > -1 && !isIE; //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["$1"]);
if(fIEVersion == 7) return "IE7" else if(fIEVersion == 8) return "IE8";
else if(fIEVersion == 9) return "IE9";
else if(fIEVersion == 10) return "IE10";
else return "IE7以下"//IE版本过低 }
if (isIE11) return 'IE11';
if (isEdge) return "Edge";
if (isFF) return "FF";
if (isOpera) return "Opera";
if (isSafari) return "Safari";
if (isChrome) return "Chrome";
}
checkStr (str, type) {
switch (type) {
case 'phone': //手机号码 return /^1[3|4|5|6|7|8|9][0-9]{9}$/.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}$)|(^\d{17}(\d|X|x)$)/.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]+$/.test(str);
case 'HTML': //HTML标记 return /<("[^"]*"|'[^']*'|[^'">])*>/.test(str);
default:
return true;
}
// 严格的身份证校验 isCardID(sId) {
if (!/(^\d{15}$)|(^\d{17}(\d|X|x)$)/.test(sId)) {
alert('你输入的身份证长度或格式错误')
return false }
//身份证城市 var aCity={11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",21:"辽宁",22:"吉林",23:"黑龙江",31:"上海",32:"江苏",33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",42:"湖北",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",51:"四川",52:"贵州",53:"云南",54:"西藏",61:"陕西",62:"甘肃",63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外"};
if(!aCity[parseInt(sId.substr(0,2))]) {
alert('你的身份证地区非法')
return false }
// 出生日期验证 var sBirthday=(sId.substr(6,4)+"-"+Number(sId.substr(10,2))+"-"+Number(sId.substr(12,2))).replace(/-/g,"/"),
d = new Date(sBirthday)
if(sBirthday != (d.getFullYear()+"/"+ (d.getMonth()+1) + "/" + d.getDate())) {
alert('身份证上的出生日期非法')
return false }
// 身份证号码校验 var sum = 0,
weights = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2],
codes = "10X98765432" for (var i = 0; i < sId.length - 1; i++) {
sum += sId[i] * weights[i];
}
var last = codes[sum % 11]; //计算出来的最后一位身份证号码 if (sId[sId.length-1] != last) {
alert('你输入的身份证号非法')
return false }
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 && year%100==0 && year%400==0) || (year%4==0 && year%100!=0) ? 28 : 29 } 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;
}
// 注：上面 else 里面的排重并不能区分 2 和 '2'，但能减少用indexOf带来的性能,暂时没找到替代的方法。。。 /* 正确排重
if ( Array.hasOwnProperty('from') ) {
return Array.from(new Set(arr))
}else{
var r = [], NaNBol = true
for(var i=0; i < arr.length; i++) {
if (arr[i] !== arr[i]) {
if (NaNBol && r.indexOf(arr[i]) === -1) {
r.push(arr[i])
NaNBol = false
}
}else{
if(r.indexOf(arr[i]) === -1) 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, "&");
str = str.replace(/
str = str.replace(/>/ig, ">");
str = str.replace(" ", " ");
return str;
}
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