整理前端最常用的函数工具方法

我们经常要用到验证输入、计算数值、排序数组、检测客户端、字符串转换等等相关的函数方法，经常需要用到的时候又去找资料，那么有了这篇文章，为您整理好了最常用的函数工具方法，收藏好了，拿来即用。

下载源码

1.验证是否为邮箱

export const isEmail = (s) => {
    return /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+((.[a-zA-Z0-9_-]{2,3}){1,2})$/.test(s)
}

2.验证手机号码

export const isMobile = (s) => {
    return /^1[3456789]\d{9}$/.test(s)
}

3.验证电话号码

export const isPhone = (s) => {
    return /^([0-9]{3,4}-)?[0-9]{7,8}$/.test(s)
}

4.验证URL网址

export const isURL = (s) => {
    return /^http[s]?:\/\/.*/.test(s)
}

5.是否是微信浏览器

export const ua = navigator.userAgent.toLowerCase();

export const isWeiXin = () => {    return ua.match(/microMessenger/i) == 'micromessenger'}

6.是否是QQ浏览器

export const isQQBrowser = () => {    return !!ua.match(/mqqbrowser|qzone|qqbrowser|qbwebviewtype/i)}

7.是否是移动端

export const isDeviceMobile = () => {    return /android|webos|iphone|ipod|balckberry/i.test(ua)}

8.是否为PC端

export const isPC = () => {    let Agents = ["Android", "iPhone",        "SymbianOS", "Windows Phone",        "iPad", "iPod"];    let flag = true;    for (var v = 0; v < Agents.length; v++) {        if (ua.indexOf(Agents[v]) > 0) {            flag = false;            break;        }    }    return flag;}

9.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)}

10.是否ios

export const isIos = () => {    if (ua.indexOf('Android') > -1 || ua.indexOf('Linux') > -1) {  //安卓手机        return false    } else if (ua.indexOf('iPhone') > -1) {//苹果手机        return true    } else if (ua.indexOf('iPad') > -1) {//iPad        return false    } else if (ua.indexOf('Windows Phone') > -1) {//winphone手机        return false    } else {        return false    }}

11.去除html标签

export const removeHtmltag = (str) => {    return str.replace(/<[^>]+>/g, '')}

12.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);}

13.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});

14.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);    }}

15.洗牌算法随机-数组乱序

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;}

16.复制内容到剪贴板

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);}

17.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}

18.将阿拉伯数字翻译成中文的数字

export const numberToChinese = (num) => {    var AA = new Array("零", "一", "二", "三", "四", "五", "六", "七", "八", "九", "十");    var BB = new Array("", "拾", "佰", "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;}

19.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;}

20.判断一个元素是否在数组中

export const contains = (arr, val) => {    return arr.indexOf(val) != -1 ? true : false;}

21.数组去重

export const unique = (arr) => {    return Array.from(new Set(arr));}

22.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;}

如何调用？

将以上各方法代码加入到utils/index.js一个文件中，然后在需要调用的文件中引入和调用方法：

import * as tools from './utils/';//调用示例let rs = tools.isEmail(该邮件地址已受到反垃圾邮件插件保护。要显示它需要在浏览器中启用 JavaScript。');console.log(rs);