前端常用60余种工具方法

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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. 劫持粘贴板 

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;
}

源码地址：github，欢迎指正或 star??

正文完
javascript
发表至： javascript
2020-05-25
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