前端常用60余种工具方法(建议收藏)

傷城~ 2023-02-28 12:42 83阅读 0赞

> 作者：vipbic
> 
> https://segmentfault.com/a/1190000022736837

![format_png][]  
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;
    }

[format_png]: /images/20230209/1606d957502840d8bee6a94211487e4b.png