javascript常用代码片段

矫情吗；* 2022-03-31 12:19 448阅读 0赞

/**
     *
     * @desc 判断两个数组是否相等
     * @param {Array} arr1
     * @param {Array} arr2
     * @return {Boolean}
     */
    function arrayEqual(arr1, arr2) {
        // 首先要判断是否是数组,传进来的非数组,返回false
        if(!(arr1 instanceof Array) || !(arr2 instanceof Array)) {
            return false;
        }
        if (arr1 === arr2) return true;
        if (arr1.length != arr2.length) return false;
        for (var i = 0; i < arr1.length; ++i) {
            if (arr1[i] !== arr2[i]) return false;
        }
        return true;
    }
    
    /**
     * @desc 获取浏览器类型和版本
     * @return {String}
     */
    function getExplore() {
        var sys = {},
            ua = navigator.userAgent.toLowerCase(),
            s;
        (s = ua.match(/rv:([\d.]+)\) like gecko/)) ? sys.ie = s[1] :
            (s = ua.match(/msie ([\d\.]+)/)) ? sys.ie = s[1] :
                (s = ua.match(/edge\/([\d\.]+)/)) ? sys.edge = s[1] :
                    (s = ua.match(/firefox\/([\d\.]+)/)) ? sys.firefox = s[1] :
                        (s = ua.match(/(?:opera|opr).([\d\.]+)/)) ? sys.opera = s[1] :
                            (s = ua.match(/chrome\/([\d\.]+)/)) ? sys.chrome = s[1] :
                                (s = ua.match(/version\/([\d\.]+).*safari/)) ? sys.safari = s[1] : 0;
    
        // 根据关系进行判断
        if (sys.ie) return ('IE: ' + sys.ie);
        if (sys.edge) return ('EDGE: ' + sys.edge);
        if (sys.firefox) return ('Firefox: ' + sys.firefox);
        if (sys.chrome) return ('Chrome: ' + sys.chrome);
        if (sys.opera) return ('Opera: ' + sys.opera);
        if (sys.safari) return ('Safari: ' + sys.safari);
        return 'Unkonwn';
    }
    
    /**
     *
     * @desc 获取操作系统类型
     * @return {String}
     */
    function getOS() {
        var userAgent = 'navigator' in window
                && 'userAgent' in navigator
                && navigator.userAgent.toLowerCase() || '';
        var vendor = 'navigator' in window
                && 'vendor' in navigator
                && navigator.vendor.toLowerCase() || '';
        var appVersion = 'navigator' in window
                && 'appVersion' in navigator
                && navigator.appVersion.toLowerCase() || '';
    
        if (/mac/i.test(appVersion))
            return 'MacOSX';
        if (/win/i.test(appVersion))
            return 'windows';
        if (/linux/i.test(appVersion))
            return 'linux';
        if (/iphone/i.test(userAgent) || /ipad/i.test(userAgent) || /ipod/i.test(userAgent))
            return 'ios';
        if (/android/i.test(userAgent))
            return 'android';
        if (/win/i.test(appVersion) && /phone/i.test(userAgent))
            return 'windowsPhone';
    }
    
    /**
     * @desc 深拷贝，支持常见类型
     * @param {Any} values
     */
    function deepClone(values) {
        var copy;
    
        // Handle the 3 simple types, and null or undefined
        if (null == values || "object" != typeof values) return values;
    
        // Handle Date
        if (values instanceof Date) {
            copy = new Date();
            copy.setTime(values.getTime());
            return copy;
        }
    
        // Handle Array
        if (values instanceof Array) {
            copy = [];
            for (var i = 0, len = values.length; i < len; i++) {
                copy[i] = deepClone(values[i]);
            }
            return copy;
        }
    
        // Handle Object
        if (values instanceof Object) {
            copy = {};
            for (var attr in values) {
                if (values.hasOwnProperty(attr)) copy[attr] = deepClone(values[attr]);
            }
            return copy;
        }
    
        throw new Error("Unable to copy values! Its type isn't supported.");
    }
    
    /**
     *
     * @desc   判断`obj`是否为空
     * @param  {Object} obj
     * @return {Boolean}
     */
    function isEmptyObject(obj) {
        if (!obj || typeof obj !== 'object' || Array.isArray(obj))
            return false
        return !Object.keys(obj).length
    }
    
    /**
     *
     * @desc 生成指定范围随机数
     * @param  {Number} min
     * @param  {Number} max
     * @return {Number}
     */
    function randomNum(min, max) {
        return Math.floor(min + Math.random() * (max - min));
    }
    
    /**
     *
     * @desc 随机生成颜色
     * @return {String}
     */
    function randomColor() {
        return '#' + ('00000' + (Math.random() * 0x1000000 << 0).toString(16)).slice(-6);
    }
    
    /**
     *
     * @desc   现金额转大写
     * @param  {Number} n
     * @return {String}
     */
    function digitUppercase(n) {
        var fraction = ['角', '分'];
        var digit = [
            '零', '壹', '贰', '叁', '肆',
            '伍', '陆', '柒', '捌', '玖'
        ];
        var unit = [
            ['元', '万', '亿'],
            ['', '拾', '佰', '仟']
        ];
        var head = n < 0 ? '欠' : '';
        n = Math.abs(n);
        var s = '';
        for (var i = 0; i < fraction.length; i++) {
            s += (digit[Math.floor(n * 10 * Math.pow(10, i)) % 10] + fraction[i]).replace(/零./, '');
        }
        s = s || '整';
        n = Math.floor(n);
        for (var i = 0; i < unit[0].length && n > 0; i++) {
            var p = '';
            for (var j = 0; j < unit[1].length && n > 0; j++) {
                p = digit[n % 10] + unit[1][j] + p;
                n = Math.floor(n / 10);
            }
            s = p.replace(/(零.)*零$/, '').replace(/^$/, '零') + unit[0][i] + s;
        }
        return head + s.replace(/(零.)*零元/, '元')
                .replace(/(零.)+/g, '零')
                .replace(/^整$/, '零元整');
    }
    
    /**
     *
     * @desc   判断是否为邮箱地址
     * @param  {String}  str
     * @return {Boolean}
     */
    function isEmail(str) {
        return /\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/.test(str);
    }
    
    /**
     *
     * @desc   判断是否为手机号
     * @param  {String|Number} str
     * @return {Boolean}
     */
    function isPhoneNum(str) {
        return /^(0|86|17951)?(13[0-9]|15[012356789]|17[678]|18[0-9]|14[57])[0-9]{8}$/.test(str)
    }
    
    /**
     * 去除空格的方法
     * @param str
     * @param type
     * all-所有空格,
     * preBehind-前后空格
     * previous-前面空格,
     * behind-后面空格
     */
    function trim(str, type) {
        switch (type) {
            case 'all':
                return str.replace(/\s+/g, "");
            case 'preBehind':
                return str.replace(/(^\s*)|(\s*$)/g, "");
            case 'previous':
                return str.replace(/(^\s*)/g, "");
            case 'behind':
                return str.replace(/(\s*$)/g, "");
            default:
                return str;
        }
    }
    
    console.log(trim('  this is a string ', 'preBehind'));
    
    /**
     * 字母大小写切换
     * @param str
     * @param type
     * FirstUpper - 首字母大写
     * FirstLower - 首字母小写
     * AllToggle - 全部大小写转换
     * AllUpper - 全部大写
     * AllLower - 全部小写
     */
    function changeCase(str, type) {
        function ToggleCase(str) {
            var itemText = ""
            str.split("").forEach(
                function (item) {
                    if (/^([a-z]+)/.test(item)) {
                        itemText += item.toUpperCase();
                    } else if (/^([A-Z]+)/.test(item)) {
                        itemText += item.toLowerCase();
                    } else {
                        itemText += item;
                    }
                });
            return itemText;
        }
    
        switch (type) {
            case 'FirstUpper':
                return str.replace(/\b\w+\b/g, function (word) {
                    return word.substring(0, 1).toUpperCase() + word.substring(1);
                });
            case 'FirstLower':
                return str.replace(/\b\w+\b/g, function (word) {
                    return word.substring(0, 1).toLowerCase() + word.substring(1);
                });
            case 'AllToggle':
                return ToggleCase(str);
            case 'AllUpper':
                return str.toUpperCase();
            case 'AllLower':
                return str.toLowerCase();
            default:
                return str;
        }
    }
    
    console.log(changeCase('hello World', 'FirstUpper'));
    
    /**
     * 检测字符串类型
     * @param str
     * @param type
     */
    function checkType(str, type) {
        switch (type) {
            case 'email':
                return /^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/.test(str);
            case 'phone':
                return /^1[3|4|5|7|8|9][0-9]{9}$/.test(str);
            case 'tel':
                return /^(0\d{2,3}-\d{7,8})(-\d{1,4})?$/.test(str);
            case 'number':
                return /^[0-9]+$/.test(str);
            case 'english':
                return /^[a-zA-Z]+$/.test(str);
            case 'text':
                return /^\w+$/.test(str);
            case 'chinese':
                return /^[\u4E00-\u9FA5]+$/.test(str);
            case 'lower':
                return /^[a-z]+$/.test(str);
            case 'upper':
                return /^[A-Z]+$/.test(str);
            default:
                return true;
        }
    }
    
    console.log(checkType('enffd', 'english'));
    
    /**
     * 检测密码强度
     * @param str
     * @returns {number}
     */
    function checkPwd(str) {
        var nowLv = 0;
        if (str.length < 6) {
            return nowLv;
        }
        if (/[0-9]/.test(str)) {
            nowLv++;
        }
        if (/[a-z]/.test(str)) {
            nowLv++;
        }
        if (/[A-Z]/.test(str)) {
            nowLv++;
        }
        if (/[\.|-|_]/.test(str)) {
            nowLv++;
        }
        return nowLv;
    
    }
    
    console.log(checkPwd('dsddsdsdasdsA1.'));
    
    /**
     * 随机生成指定长度的字符串
     * @param length
     * @returns {string}
     */
    function random(length) {
        var str = Math.random().toString(36).substr(2);
        if (str.length >= length) {
            return str.substr(0, length);
        }
        str += random(length - str.length);
        return str;
    }
    
    console.log(random(12));
    console.log(random(3));
    
    /**
     * 统计给定字符串中,目标字符串出现的次数
     * @param str
     */
    function countStr(str, target) {
        return str.split(target).length - 1;
    }
    
    console.log(countStr('thisiskingxkingakingb', 'king'));
    
    /**
     * 格式化处理字符串
     * @param str
     * @param size-位数,默认3位
     * @param delimiter-连接符,默认为','
     */
    function formatText(str, size, delimiter) {
        var _size = size || 3, _delimiter = delimiter || ',';
        var regText = '\\B(?=(\\w{' + _size + '})+(?!\\w))';
        var reg = new RegExp(regText, 'g');
        return str.replace(reg, _delimiter);
    }
    
    console.log(formatText('1234asda567asd890', 4, '-'));
    
    /**
     * 找出字符串中最长的单词
     * @param str
     * @param splitType
     */
    function longestWord(str, splitType) {
        var _splitType = splitType || /\s+/g,
            _max = 0, _item = '';
        var strArr = str.split(_splitType);
        strArr.forEach(function (item) {
            if (_max < item.length) {
                _max = item.length;
                _item = item;
            }
        });
        return {el: _item, max: _max};
    }
    
    console.log(longestWord('Find|the|Longest|word|in|a|String','|'));