前端常用 60 余种工具方法
全文原地址
1. 邮箱
export const isEmail = (s) => {return /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+((.[a-zA-Z0-9_-]{2,3}){1,2})$/.test(s)}2. 手机号码
export const isMobile = (s) => {return /^1[0-9]{10}$/.test(s)}3. 电话号码
export const isPhone = (s) => {return /^([0-9]{3,4}-)?[0-9]{7,8}$/.test(s)}4. 是否 url 地址
export const isURL = (s) => {return /^http[s]?:\/\/.*/.test(s)}5. 是否字符串
export const isString = (o) => {return Object.prototype.toString.call(o).slice(8, -1) === 'String'}6. 是否数字
export const isNumber = (o) => {return Object.prototype.toString.call(o).slice(8, -1) === 'Number'}7. 是否 boolean
export const isBoolean = (o) => {return Object.prototype.toString.call(o).slice(8, -1) === 'Boolean'}8. 是否函数
export const isFunction = (o) => {return Object.prototype.toString.call(o).slice(8, -1) === 'Function'}9. 是否为 null
export const isNull = (o) => {return Object.prototype.toString.call(o).slice(8, -1) === 'Null'}10. 是否 undefined
export const isUndefined = (o) => {return Object.prototype.toString.call(o).slice(8, -1) === 'Undefined'}11. 是否对象
export const isObj = (o) => {return Object.prototype.toString.call(o).slice(8, -1) === 'Object'}12. 是否数组
export const isArray = (o) => {return Object.prototype.toString.call(o).slice(8, -1) === 'Array'}13. 是否时间
export const isDate = (o) => {return Object.prototype.toString.call(o).slice(8, -1) === 'Date'}14. 是否正则
export const isRegExp = (o) => {return Object.prototype.toString.call(o).slice(8, -1) === 'RegExp'}15. 是否错误对象
export const isError = (o) => {return Object.prototype.toString.call(o).slice(8, -1) === 'Error'}16. 是否 Symbol 函数
export const isSymbol = (o) => {return Object.prototype.toString.call(o).slice(8, -1) === 'Symbol'}17. 是否 Promise 对象
export const isPromise = (o) => {return Object.prototype.toString.call(o).slice(8, -1) === 'Promise'}18. 是否 Set 对象
export const isSet = (o) => {return Object.prototype.toString.call(o).slice(8, -1) === 'Set'}export const ua = navigator.userAgent.toLowerCase();19. 是否是微信浏览器
export const isWeiXin = () => { return ua.match(/microMessenger/i) == 'micromessenger'}20. 是否是移动端
export const isDeviceMobile = () => { return /android|webos|iphone|ipod|balckberry/i.test(ua)}21. 是否是 QQ 浏览器
export const isQQBrowser = () => { return !!ua.match(/mqqbrowser|qzone|qqbrowser|qbwebviewtype/i)}22. 是否是爬虫
export const isSpider = () => { return /adsbot|googlebot|bingbot|msnbot|yandexbot|baidubot|robot|careerbot|seznambot|bot|baiduspider|jikespider|symantecspider|scannerlwebcrawler|crawler|360spider|sosospider|sogou web sprider|sogou orion spider/.test(ua)}23. 是否 ios
export const isIos = () => { var u = navigator.userAgent; if (u.indexOf('Android') > -1 || u.indexOf('Linux') > -1) {// 安卓手机 return false} else if (u.indexOf('iPhone') > -1) {// 苹果手机 return true} else if (u.indexOf('iPad') > -1) {//iPad return false} else if (u.indexOf('Windows Phone') > -1) {//winphone 手机 return false} else {return false}}24. 是否为 PC 端
export const isPC = () => { 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;}25. 去除 html 标签
export const removeHtmltag = (str) => {return str.replace(/<[^>]+>/g, '')}26. 获取 url 参数
export const getQueryString = (name) => {const reg = new RegExp('(^|&)' + name + '=([^&]*)(&|$)', 'i'); const search = window.location.search.split('?')[1] || ''; const r = search.match(reg) || []; return r[2];}27. 动态引入 js
export const injectScript = (src) => {const s = document.createElement('script'); s.type = 'text/javascript'; s.async = true; s.src = src; const t = document.getElementsByTagName('script')[0]; t.parentNode.insertBefore(s, t);}28. 根据 url 地址下载
export const download = (url) => {var isChrome = navigator.userAgent.toLowerCase().indexOf('chrome') > -1; var isSafari = navigator.userAgent.toLowerCase().indexOf('safari') > -1; if (isChrome || isSafari) {var link = document.createElement('a'); link.href = url; if (link.download !== undefined) {var fileName = url.substring(url.lastIndexOf('/') + 1, url.length); link.download = fileName; } if (document.createEvent) {var e = document.createEvent('MouseEvents'); e.initEvent('click', true, true); link.dispatchEvent(e); return true; } } if (url.indexOf('?') === -1) {url += '?download';} window.open(url, '_self'); return true;}29.el 是否包含某个 class
export const hasClass = (el, className) => {let reg = new RegExp('(^|\\s)' + className + '(\\s|$)') return reg.test(el.className)}30.el 添加某个 class
export const addClass = (el, className) => {if (hasClass(el, className)) {return} let newClass = el.className.split('') newClass.push(className) el.className = newClass.join(' ')}31.el 去除某个 class
export const removeClass = (el, className) => {if (!hasClass(el, className)) {return} let reg = new RegExp('(^|\\s)' + className + '(\\s|$)', 'g') el.className = el.className.replace(reg, ' ')}32. 获取滚动的坐标
export const getScrollPosition = (el = window) => ({x: el.pageXOffset !== undefined ? el.pageXOffset : el.scrollLeft, y: el.pageYOffset !== undefined ? el.pageYOffset : el.scrollTop});33. 滚动到顶部
export const scrollToTop = () => { const c = document.documentElement.scrollTop || document.body.scrollTop; if (c > 0) {window.requestAnimationFrame(scrollToTop); window.scrollTo(0, c - c / 8); }}34.el 是否在视口范围内
export const elementIsVisibleInViewport = (el, partiallyVisible = false) => {const { top, left, bottom, right} = el.getBoundingClientRect(); const { innerHeight, innerWidth} = window; return partiallyVisible ? ((top > 0 && top < innerHeight) || (bottom > 0 && bottom < innerHeight)) && ((left > 0 && left < innerWidth) || (right > 0 && right < innerWidth)) : top >= 0 && left >= 0 && bottom <= innerHeight && right <= innerWidth;}35. 洗牌算法随机
export const shuffle = (arr) => {var result = [], random; while (arr.length > 0) {random = Math.floor(Math.random() * arr.length); result.push(arr[random]) arr.splice(random, 1) } return result;}36. 拦截粘贴板
export const copyTextToClipboard = (value) => {var textArea = document.createElement("textarea"); textArea.style.background = 'transparent'; textArea.value = value; document.body.appendChild(textArea); textArea.select(); try { var successful = document.execCommand('copy'); } catch (err) {console.log('Oops, unable to copy'); } document.body.removeChild(textArea);}37. 判断类型集合
export const 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; }}38. 严格的身份证校验
export const isCardID = (sId) => {if (!/(^\d{15}$)|(^\d{17}(\d|X|x)$)/.test(sId)) {console.log('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))]) {console.log('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())) {console.log('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) {console.log('你输入的身份证号非法') return false } return true}39. 随机数范围
export const random = (min, max) => {if (arguments.length === 2) {return Math.floor(min + Math.random() * ((max + 1) - min)) } else {return null;}}40. 将阿拉伯数字翻译成中文的大写数字
export const 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;}41. 将数字转换为大写金额
export const 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;}42. 判断一个元素是否在数组中
export const contains = (arr, val) => {return arr.indexOf(val) != -1 ? true : false;}43. 数组排序，{type} 1：从小到大 2：从大到小 3：随机
export const 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; } })}44. 去重
export const 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; }}45. 求两个集合的并集
export const union = (a, b) => {var newArr = a.concat(b); return this.unique(newArr);}46. 求两个集合的交集
export const intersect = (a, b) => {var _this = this; a = this.unique(a); return this.map(a, function (o) {return _this.contains(b, o) ? o : null; });}47. 删除其中一个元素
export const remove = (arr, ele) => {var index = arr.indexOf(ele); if (index > -1) {arr.splice(index, 1); } return arr;}48. 将类数组转换为数组
export const formArray = (ary) => {var arr = []; if (Array.isArray(ary)) {arr = ary;} else {arr = Array.prototype.slice.call(ary); }; return arr;}49. 最大值
export const max = (arr) => {return Math.max.apply(null, arr);}50. 最小值
export const min = (arr) => {return Math.min.apply(null, arr);}51. 求和
export const sum = (arr) => {return arr.reduce((pre, cur) => {return pre + cur})}52. 平均值
export const average = (arr) => {return this.sum(arr) / arr.length}53. 去除空格,type: 1- 所有空格 2- 前后空格 3- 前空格 4- 后空格
export const 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*$)/g,""); default: return str; }}54. 字符转换，type: 1: 首字母大写 2：首字母小写 3：大小写转换 4：全部大写 5：全部小写
export const changeCase = (str, type) => {type = type || 4 switch (type) {case 1: return str.replace(/\b\w+\b/g, function (word) {return word.substring(0, 1).toUpperCase() + word.substring(1).toLowerCase();}); case 2: return str.replace(/\b\w+\b/g, function (word) {return word.substring(0, 1).toLowerCase() + word.substring(1).toUpperCase();}); case 3: return str.split('').map(function (word) {if (/[a-z]/.test(word)) {return word.toUpperCase(); } else {return word.toLowerCase() } }).join('') case 4: return str.toUpperCase(); case 5: return str.toLowerCase(); default: return str; }}55. 检测密码强度
export const checkPwd = (str) => {var Lv = 0; if (str.length < 6) {return Lv} if (/[0-9]/.test(str)) {Lv++} if (/[a-z]/.test(str)) {Lv++} if (/[A-Z]/.test(str)) {Lv++} if (/[\.|-|_]/.test(str)) {Lv++} return Lv;}56. 函数节流器
export const debouncer = (fn, time, interval = 200) => {if (time - (window.debounceTimestamp || 0) > interval) {fn && fn(); window.debounceTimestamp = time; }}57. 在字符串中插入新字符串
export const insertStr = (soure, index, newStr) => {var str = soure.slice(0, index) + newStr + soure.slice(index); return str;}58. 判断两个对象是否键值相同
export const isObjectEqual = (a, b) => {var aProps = Object.getOwnPropertyNames(a); var bProps = Object.getOwnPropertyNames(b); if (aProps.length !== bProps.length) {return false;} for (var i = 0; i < aProps.length; i++) {var propName = aProps[i]; if (a[propName] !== b[propName]) {return false;} } return true;}59.16 进制颜色转 RGBRGBA 字符串
export const colorToRGB = (val, opa) => {var pattern = /^(#?)[a-fA-F0-9]{6}$/; //16 进制颜色值校验规则 var isOpa = typeof opa == 'number'; // 判断是否有设置不透明度 if (!pattern.test(val)) {// 如果值不符合规则返回空字符 return '';} var v = val.replace(/#/,''); // 如果有 #号先去除# 号 var rgbArr = []; var rgbStr = ''; for (var i = 0; i < 3; i++) {var item = v.substring(i * 2, i * 2 + 2); var num = parseInt(item, 16); rgbArr.push(num); } rgbStr = rgbArr.join(); rgbStr ='rgb'+ (isOpa ?'a':'') + '(' + rgbStr + (isOpa ? ',' + opa : '') +')'; return rgbStr;}60. 追加 url 参数
export const appendQuery = (url, key, value) => {var options = key; if (typeof options == 'string') {options = {}; options[key] = value; } options = $.param(options); if (url.includes('?')) {url += '&' + options} else {url += '?' + options} return url;}