function verifyEmailAddress(strEmail){var myReg = /^[_a-zA-Z0-9_-_._-]+@([_a-zA-Z0-9_-]+\.)+[a-zA-Z]{2,3}$/; return myReg.test(strEmail); }

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; } }

function CheckAll(form){var length = form.itemId.length; var tocheck = form.chkall.checked; if (length)for (var i=0; i

10.数字输入控制

function InputIntNumberCheck(){//为支持IE 或 Netscapevar theEvent=window.event || arguments.callee.caller.arguments[0]; var elm ; var ver = navigator.appVersion; if (ver.indexOf("MSIE") != -1){// IEif ( !((theEvent.keyCode >=48)&&(theEvent.keyCode<=57))){theEvent.keyCode=0; }}else{ // Netscapeif ( !((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 < 11type: "IE",version: Number(t.match(/msie ([\d]+)/)[1])} : !!t.match(/trident\/.+?rv:(([\d.]+))/) ? { // ie 11type: "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] = trueresult.push(item)}}else{//引用类型及symbolif(!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 = https://www.it610.com/article/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); }}

【35个JS中实用工具函数的代码分享】
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.提取身份证中性别及出生日期信息 身份证号 倒数第二位是性别，奇数为男，偶数为女

function getIdcardData(){var ido=document.getElementById('idCardNumberHandle'); //身份证号input元素的IDvar 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('身份证号非法.'); return; }bd.value=https://www.it610.com/article/(RegExp.$1).substr(0,4)+'-'+(RegExp.$1).substr(4,2)+'-'+(RegExp.$1).substr(6,2); //设置出生日期ex.value=https://www.it610.com/article/(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.根据身份证获取出生日期以及年龄

//根据身份证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 = $("#idNumber").val().substring(12, 14)var birth = num + "/" + mon + "/" + davar dt = new Date()var year = dt.getFullYear()$("#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)
文章图片

//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+1var 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0function 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)
文章图片

//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+1var 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0function addDate0(time) {if (time.toString().length == 1) {time = '0' + time.toString(); }return time; }

以上就是35个JS中实用工具函数的代码分享的详细内容，更多关于JS工具函数的资料请关注脚本之家其它相关文章！

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