JS工具函数
白哥Java 人气:01.Js天数相加获取新日期
function timestampToTime(timestamp) { var date = new Date(timestamp);//时间戳为10位需*1000,时间戳为13位的话不需乘1000 var Y = date.getFullYear(); var M = (date.getMonth()+1 < 10 ? '0'+(date.getMonth()+1):date.getMonth()+1); var D = (date.getDate()< 10 ? '0'+date.getDate():date.getDate()); return Y+"年"+M+"月"+D+"日"; }
实用方法:
2.获取当前日期(yyyyMMdd格式)
function getNowFormatDate() { var date = new Date(); var year = date.getFullYear(); var month = date.getMonth() + 1; var strDate = date.getDate(); if (month >= 1 && month <= 9) { month = "0" + month; } if (strDate >= 0 && strDate <= 9) { strDate = "0" + strDate; } var currentdate = year + "年" + month + "月" + strDate + "日"; $("#time").html(currentdate) return currentdate; }
3.四舍五入
function toDecimal(x) { var f = parseFloat(x); if (isNaN(f)) { return; } f = Math.round(x*100)/100; return f; }
4.Js将数字转成中文大写数字
var digitUppercase = function(n) { var fraction = ['角', '分']; var digit = [ '零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖' ]; var unit = [ ['元', '万', '亿'], ['', '拾', '佰', '仟'] ]; var head = n < 0 ? '欠' : ''; n = Math.abs(n); var s = ''; for (var i = 0; i < fraction.length; i++) { s += (digit[Math.floor(n * 10 * Math.pow(10, i)) % 10] + fraction[i]).replace(/零./, ''); } s = s || '整'; n = Math.floor(n); for (var i = 0; i < unit[0].length && n > 0; i++) { var p = ''; for (var j = 0; j < unit[1].length && n > 0; j++) { p = digit[n % 10] + unit[1][j] + p; n = Math.floor(n / 10); } s = p.replace(/(零.)*零$/, '').replace(/^$/, '零') + unit[0][i] + s; } return head + s.replace(/(零.)*零元/, '元') .replace(/(零.)+/g, '零') .replace(/^整$/, '零元整'); }
5.判断数据是否为空
function dataIsNotNull(data) { if (data != null && typeof(data) != "undefined" && data != "" && data != "''" && data != '') { return true; } else { return false; } }
6.字符串日期比较
/* 比较俩个字符串时间A-B * A>B return 1 * A<B return -1 * A=B return 0 */ $.compareTime = function(time1,time2) { if(new Date(time1.replace("-", "/").replace("-", "/")).getTime() > new Date(time2.replace("-", "/").replace("-", "/")).getTime()) { return 1; }else if(new Date(time1.replace("-", "/").replace("-", "/")).getTime() < new Date(time2.replace("-", "/").replace("-", "/")).getTime()) { return -1; }else if(new Date(time1.replace("-", "/").replace("-", "/")).getTime() == new Date(time2.replace("-", "/").replace("-", "/")).getTime()) { return 0; }else { return 2; } };
7.验证邮件
function verifyEmailAddress(strEmail){ var myReg = /^[_a-zA-Z0-9_-_._-]+@([_a-zA-Z0-9_-]+\.)+[a-zA-Z]{2,3}$/; return myReg.test(strEmail); }
8.判断是否为日期数据
function itIsDate(DateString , Dilimeter) { if (DateString==null) return false; if (Dilimeter=='' || Dilimeter==null) Dilimeter = '-'; var tempy=''; var tempm=''; var tempd=''; var tempArray; if (DateString.length<8 && DateString.length>10) return false; tempArray = DateString.split(Dilimeter); if (tempArray.length!=3) return false; if (tempArray[0].length==4) { tempy = tempArray[0]; tempd = tempArray[2]; } else { tempy = tempArray[2]; tempd = tempArray[1]; } tempm = tempArray[1]; var tDateString = tempy + '/'+tempm + '/'+tempd+' 8:0:0';//加八小时是因为我们处于东八区 var tempDate = new Date(tDateString); if (isNaN(tempDate)) return false; if (((tempDate.getUTCFullYear()).toString()==tempy) && (tempDate.getMonth()==parseInt(tempm)-1) && (tempDate.getDate()==parseInt(tempd))) { return true; } else { return false; } }
9.复选框的全选与取消
function CheckAll(form){ var length = form.itemId.length; var tocheck = form.chkall.checked; if (length) for (var i=0; i<length; i++){ if (form.itemId[i].disabled != true){ form.itemId[i].checked = tocheck; } } else { if (form.itemId.disabled !=true){ form.itemId.checked = tocheck; } } }
10.数字输入控制
function InputIntNumberCheck(){ //为支持IE 或 Netscape var theEvent=window.event || arguments.callee.caller.arguments[0]; var elm ; var ver = navigator.appVersion; if (ver.indexOf("MSIE") != -1){ // IE if ( !((theEvent.keyCode >=48)&&(theEvent.keyCode<=57))){ theEvent.keyCode=0; } }else{ // Netscape if ( !((theEvent.which >=48)&&(theEvent.which<=57))){ theEvent.stopPropagation(); theEvent.preventDefault(); } } // }
11.设置以及获取cookie
function setCookie(name, value, Hours) { var d = new Date(); var offset = 8; var utc = d.getTime() + (d.getTimezoneOffset() * 60000); var nd = utc + (3600000 * offset); var exp = new Date(nd); exp.setTime(exp.getTime() + Hours * 60 * 60 * 1000); document.cookie = name + "=" + escape(value) + ";path=/;expires=" + exp.toGMTString() + ";domain=360doc.com;" }
function getCookie(name) { var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)")); if (arr != null) return unescape(arr[2]); return null }
12.数据排序
function 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; } }) }
13.记忆函数(缓存函数运算结果)
function cached(fn) { let cache = Object.create(null); return function cachedFn(str) { let hit = cache[str]; return hit || (cache[str] = fn(str)) } }
14.获取浏览器信息
function getExplorerInfo() { let t = navigator.userAgent.toLowerCase(); return 0 <= t.indexOf("msie") ? { //ie < 11 type: "IE", version: Number(t.match(/msie ([\d]+)/)[1]) } : !!t.match(/trident\/.+?rv:(([\d.]+))/) ? { // ie 11 type: "IE", version: 11 } : 0 <= t.indexOf("edge") ? { type: "Edge", version: Number(t.match(/edge\/([\d]+)/)[1]) } : 0 <= t.indexOf("firefox") ? { type: "Firefox", version: Number(t.match(/firefox\/([\d]+)/)[1]) } : 0 <= t.indexOf("chrome") ? { type: "Chrome", version: Number(t.match(/chrome\/([\d]+)/)[1]) } : 0 <= t.indexOf("opera") ? { type: "Opera", version: Number(t.match(/opera.([\d]+)/)[1]) } : 0 <= t.indexOf("Safari") ? { type: "Safari", version: Number(t.match(/version\/([\d]+)/)[1]) } : { type: t, version: -1 } }
15.数组去重 返回一个新数组
function unique(arr){ if(!isArrayLink(arr)){ //不是类数组对象 return arr } let result = [] let objarr = [] let obj = Object.create(null) arr.forEach(item => { if(isStatic(item)){//是除了symbol外的原始数据 let key = item + '_' + getRawType(item); if(!obj[key]){ obj[key] = true result.push(item) } }else{//引用类型及symbol if(!objarr.includes(item)){ objarr.push(item) result.push(item) } } }) return resulte }
16.Base64数据导出文件 文件下载
function downloadFile(filename, data){ let DownloadLink = document.createElement('a'); if ( DownloadLink ){ document.body.appendChild(DownloadLink); DownloadLink.style = 'display: none'; DownloadLink.download = filename; DownloadLink.href = data; if ( document.createEvent ){ let DownloadEvt = document.createEvent('MouseEvents'); DownloadEvt.initEvent('click', true, false); DownloadLink.dispatchEvent(DownloadEvt); } else if ( document.createEventObject ) DownloadLink.fireEvent('onclick'); else if (typeof DownloadLink.onclick == 'function' ) DownloadLink.onclick(); document.body.removeChild(DownloadLink); } }
17.全屏
function toFullScreen(){ let elem = document.body; elem.webkitRequestFullScreen ? elem.webkitRequestFullScreen() : elem.mozRequestFullScreen ? elem.mozRequestFullScreen() : elem.msRequestFullscreen ? elem.msRequestFullscreen() : elem.requestFullScreen ? elem.requestFullScreen() : alert("浏览器不支持全屏"); }
18.退出全屏
function toFullScreen(){ let elem = document.body; elem.webkitRequestFullScreen ? elem.webkitRequestFullScreen() : elem.mozRequestFullScreen ? elem.mozRequestFullScreen() : elem.msRequestFullscreen ? elem.msRequestFullscreen() : elem.requestFullScreen ? elem.requestFullScreen() : alert("浏览器不支持全屏"); }
19.求出数组中最大非NaN值
function max(arr){ arr = arr.filter(item => !_isNaN(item)) return arr.length ? Math.max.apply(null, arr) : undefined } //max([1, 2, '11', null, 'fdf', []]) ==> 11
20.求出数组中最小非NaN值
function min(arr){ arr = arr.filter(item => !_isNaN(item)) return arr.length ? Math.min.apply(null, arr) : undefined } //min([1, 2, '11', null, 'fdf', []]) ==> 1
21.使用正则验证数字
function isNumber(val){ var regPos = /^\d+(\.\d+)?$/; //非负浮点数 var regNeg = /^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$/; //负浮点数 if(regPos.test(val) || regNeg.test(val)){ return true; }else{ return false; } }
22.验证数组是否有重复元素
function hasRepeatValue(a) { return /(\x0f[^\x0f]+)\x0f[\s\S]*\1/.test("\x0f" + a.join("\x0f\x0f") + "\x0f"); }
23.提取SFZ中性别及出生日期信息
SFZ号 倒数第二位是性别,奇数为男,偶数为女
function getIdcardData(){ var ido=document.getElementById('idCardNumberHandle');//SFZ号input元素的ID var bd=document.getElementById('birthdayHandle'); var sex=document.getElementById('sexHandle'); if(!/^\d{6}((?:19|20)((?:\d{2}(?:0[13578]|1[02])(?:0[1-9]|[12]\d|3[01]))|(?:\d{2}(?:0[13456789]|1[012])(?:0[1-9]|[12]\d|30))|(?:\d{2}02(?:0[1-9]|1\d|2[0-8]))|(?:(?:0[48]|[2468][048]|[13579][26])0229)))\d{2}(\d)[xX\d]$/.test(ido.value)){ alert('SFZ号非法.'); return; } bd.value=(RegExp.$1).substr(0,4)+'-'+(RegExp.$1).substr(4,2)+'-'+(RegExp.$1).substr(6,2);//设置出生日期 ex.value=(parseInt(ido.value.charAt(ido.value.length-2))%2==0?'女':'男');//设置性别 }
24.在现有元素后插入一个新元素
function insertAfter(newElement,targetElement){ var parent = targetElement.parentNode; if (parent.lastChild == targetElement) { parent.appendChild(newElement); } else { parent.insertBefore(newElement,targetElement.nextSubling) } }
25.获取浏览器url中的参数值
var getURLParam = function(name) { return decodeURIComponent((new RegExp('[?|&]' + name + '=' + '([^&;]+?)(&|#|;|$)', "ig").exec(location.search) || [, ""])[1].replace(/\+/g, '%20')) || null; };
26.深度拷贝对象
function cloneObj(obj) { var o = obj.constructor == Object ? new obj.constructor() : new obj.constructor(obj.valueOf()); for(var key in obj){ if(o[key] != obj[key] ){ if(typeof(obj[key]) == 'object' ){ o[key] = mods.cloneObj(obj[key]); }else{ o[key] = obj[key]; } } } return o; }
27.生成随机数
function randombetween(min, max){ return min + (Math.random() * (max-min +1)); }
28.判断是手机还是pc端
function browserRedirect() { var sUserAgent = navigator.userAgent.toLowerCase(); var bIsIpad = sUserAgent.match(/ipad/i) == "ipad"; var bIsIphoneOs = sUserAgent.match(/iphone os/i) == "iphone os"; var bIsMidp = sUserAgent.match(/midp/i) == "midp"; var bIsUc7 = sUserAgent.match(/rv:1.2.3.4/i) == "rv:1.2.3.4"; var bIsUc = sUserAgent.match(/ucweb/i) == "ucweb"; var bIsAndroid = sUserAgent.match(/android/i) == "android"; var bIsCE = sUserAgent.match(/windows ce/i) == "windows ce"; var bIsWM = sUserAgent.match(/windows mobile/i) == "windows mobile"; if (bIsIpad || bIsIphoneOs || bIsMidp || bIsUc7 || bIsUc || bIsAndroid || bIsCE || bIsWM) { //手机端 } else { //pc端 $('*').css("width",'100%'); $('*').css("height",'100%'); } } browserRedirect(); //判断是手机端还是pc端 $(function(){ var h = window.screen.height; var w = window.screen.width; $('#myiframe').attr("width",w); //把宽属性追加进去 $('#myiframe').attr("height",h); //把高属性追加进去 })
29.根据出生日期计算年龄
//计算年龄 function getAge(strBirthday) { var a = /^(\d{4})-(\d{2})-(\d{2})$/ if (a.test(strBirthday)) { var birthYear = strBirthday.substring(0, 4); var year = new Date(); var Nyear = year.getFullYear(); var Nage = Nyear - birthYear; if (Nage <= 0) { Nage = 1; } return Nage;//返回年龄 } else { return ""; } }
30.BMI计算
//BMI计算 function getBMI(w, h) { h = h * 0.01; var bmi = (w / (h * h)).toFixed(4); return bmi; }
31.体表面积计算
//体表面积计算 function getBodyArea(w, h) { var bodyArea = (0.0061 * h + 0.0128 * w - 0.1529).toFixed(4); return bodyArea; }
32.根据SFZ获取出生日期以及年龄
//根据SFZ获取出生日期以及相应年龄是多少 $("#idNumber").on("blur", function () { var num = Number($("#idNumber").val().split("").slice(6, 10).join("")) var mon = $("#idNumber").val().substring(10, 12) var da = $("#idNumber").val().substring(12, 14) var birth = num + "/" + mon + "/" + da var dt = new Date() var year = dt.getFullYear() $("#birthday").val(birth) $("#age").text(year - num) })
33.判断字符串是否是数字
function isNumber(val) { var regPos = /^\d+(\.\d+)?$/;//非负浮点数 var regNeg = /^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$/;//负浮点数 if(regPos.test(val) || regNeg.test(val)) { return true; }else { return false; } }
34.查询最近七天的日期(前七天 当前日期2021-10-13)
//返回最近七天的日期 function getday2() { var days = []; var date = new Date(); for(var i=0; i<=144;i+=24){ //144是前六天的小时数 var dateItem=new Date(date.getTime() - i * 60 * 60 * 1000); //使用当天时间戳减去以前的时间毫秒(小时*分*秒*毫秒) var y = dateItem.getFullYear(); //获取年份 var m = dateItem.getMonth() + 1; //获取月份js月份从0开始,需要+1 var d= dateItem.getDate(); //获取日期 m = addDate0(m); //给为单数的月份补零 d = addDate0(d); //给为单数的日期补零 var valueItem= y + '-' + m + '-' + d; //组合 days.push(valueItem); //添加至数组 } console.log('最近七天日期:',days); return days; } //给日期加0 function addDate0(time) { if (time.toString().length == 1) { time = '0' + time.toString(); } return time; }
35.查询最近七天的日期(后七天 当前日期2021-10-13)
//返回最近七天的日期 function getday2() { var days = []; var date = new Date(); for(var i=0; i<=144;i+=24){ //144是前六天的小时数 var dateItem=new Date(date.getTime() + i * 60 * 60 * 1000); //使用当天时间戳减去以前的时间毫秒(小时*分*秒*毫秒) var y = dateItem.getFullYear(); //获取年份 var m = dateItem.getMonth() + 1; //获取月份js月份从0开始,需要+1 var d= dateItem.getDate(); //获取日期 m = addDate0(m); //给为单数的月份补零 d = addDate0(d); //给为单数的日期补零 var valueItem= y + '-' + m + '-' + d; //组合 days.push(valueItem); //添加至数组 } console.log('最近七天日期:',days); return days; } //给日期加0 function addDate0(time) { if (time.toString().length == 1) { time = '0' + time.toString(); } return time; }
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