组件中的uitl js片段

1. 数组中是否存在某个元素（基本类型）oneOf()

export function oneOf (value, validList) {
    for (let i = 0; i < validList.length; i++) {
        if (value === validList[i]) {
            return true;
        }
    }
    return false;
}
var validList = [1,2,3,4,5,6.'abc'];
oneOf(6,validList ) //true

2. 稳定的类型判断，自定义typeOf()

function typeOf(obj) {
    const toString = Object.prototype.toString;
    const map = {
        '[object Boolean]'  : 'boolean',
        '[object Number]'   : 'number',
        '[object String]'   : 'string',
        '[object Function]' : 'function',
        '[object Array]'    : 'array',
        '[object Date]'     : 'date',
        '[object RegExp]'   : 'regExp',
        '[object Undefined]': 'undefined',
        '[object Null]'     : 'null',
        '[object Object]'   : 'object'
    };
    return map[toString.call(obj)];
}

3. 数据深拷贝deepCopy()

// deepCopy
function deepCopy(data) {
    const t = typeOf(data); //依赖标题2中的的自定义typeOf()
    let o;

    if (t === 'array') {
        o = [];
    } else if ( t === 'object') {
        o = {};
    } else {
        return data;
    }

    if (t === 'array') {
        for (let i = 0; i < data.length; i++) {
            o.push(deepCopy(data[i]));
        }
    } else if ( t === 'object') {
        for (let i in data) {
            o[i] = deepCopy(data[i]);
        }
    }
    return o;
}

4. 首字母大写firstUpperCase()

function firstUpperCase(str) {
    return str.toString()[0].toUpperCase() + str.toString().slice(1);
}
firstUpperCase("abc") //"Abc"

5. 滚动条过度

// scrollTop animation
export function scrollTop(el, from = 0, to, duration = 500, endCallback) {
    if (!window.requestAnimationFrame) {
        window.requestAnimationFrame = (
            window.webkitRequestAnimationFrame ||
            window.mozRequestAnimationFrame ||
            window.msRequestAnimationFrame ||
            function (callback) {
                return window.setTimeout(callback, 1000/60);
            }
        );
    }
    const difference = Math.abs(from - to);
    const step = Math.ceil(difference / duration * 50);

    function scroll(start, end, step) {
        if (start === end) {
            endCallback && endCallback();
            return;
        }

        let d = (start + step > end) ? end : start + step;
        if (start > end) {
            d = (start - step < end) ? end : start - step;
        }

        if (el === window) {
            window.scrollTo(d, d);
        } else {
            el.scrollTop = d;
        }
        window.requestAnimationFrame(() => scroll(d, end, step));
    }
    scroll(from, to, step);
}

6. 数组去重

//去重
function unique(arr) {
    const res = new Map();
    return arr.filter((a) => !res.has(a) && res.set(a, 1))
}

感觉下面这个没那么绕

function dedupe(arr) {
  return Array.from( new Set(arr))
}
function dedupe(arr) {
  return [ ...new Set(arr)]
}

7.判断引用类型是否为空

/**
 * 判断是否为空
 */
export function validatenull(val) {
    if (val instanceof Array) {
        if (val.length == 0) return true;
    } else if (val instanceof Object) {
        if (JSON.stringify(val) === '{}') return true;
    } else {
        if (val == 'null' || val == null || val == 'undefined' || val == undefined || val == '') return true;
        return false;
    }
    return false;

};

6. 判断是否为小数

/**
 * 判断是否为小数
 */
export function validatenumord(num, type) {
    let regName = /[^\d.]/g;
    if (type == 1) {
        if (!regName.test(num)) return false;
    } else if (type == 2) {
        regName = /[^\d.]/g;
        if (!regName.test(num)) return false;
    }
    return true;
};

8. 整数判断

/**
 * 判断是否为整数
 */
export function validatenum(num, type) {
    let regName = /[^\d.]/g;
    if (type == 1) {
        if (!regName.test(num)) return false;
    } else if (type == 2) {
        regName = /[^\d]/g;
        if (!regName.test(num)) return false;
    }
    return true;
};

9. 判断姓名

function validatename(name) {
    var regName = /^[\u4e00-\u9fa5]{2,6}$/;
    if (!regName.test(name)) return false;
    return true;
};

10. 手机号码

/**
 * 判断手机号码是否正确 依赖上面的validatenull();
 */
export function isvalidatemobile(phone) {
    let list = [];
    let result = true;
    let msg = '';
    var isPhone = /^0\d{2,3}-?\d{7,8}$/;
    //增加134 减少|1349[0-9]{7}，增加181,增加145，增加17[678]  
    var isMob = /^((\+?86)|(\(\+86\)))?(13[0123456789][0-9]{8}|15[012356789][0-9]{8}|18[012356789][0-9]{8}|14[57][0-9]{8}|17[3678][0-9]{8})$/;
    if (!validatenull(phone)) {
        if (phone.length == 11) {
            if (isPhone.test(phone)) {
                msg = '手机号码格式不正确';
            } else {
                result = false;
            }
        } else {
            msg = '手机号码长度不为11位';
        }
    } else {
        msg = '手机号码不能为空';
    }
    list.push(result);
    list.push(msg);
    return list;
}

11.判断身份证号码

/**
 * 判断身份证号码
 */
export function cardid(code) {
    let list = [];
    let result = true;
    let msg = '';
    var city = {
        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 (!validatenull(code)) {
        if (code.length == 18) {
            if (!code || !/(^\d{18}$)|(^\d{17}(\d|X|x)$)/.test(code)) {
                msg = "证件号码格式错误";
            } else if (!city[code.substr(0, 2)]) {
                msg = "地址编码错误";
            } else {
                //18位身份证需要验证最后一位校验位
                code = code.split('');
                //∑(ai×Wi)(mod 11)
                //加权因子
                var factor = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];
                //校验位
                var parity = [1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2, 'x'];
                var sum = 0;
                var ai = 0;
                var wi = 0;
                for (var i = 0; i < 17; i++) {
                    ai = code[i];
                    wi = factor[i];
                    sum += ai * wi;
                }
                var last = parity[sum % 11];
                if (parity[sum % 11] != code[17]) {
                    msg = "证件号码校验位错误";
                } else {
                    result = false;
                }

            }
        } else {
            msg = "证件号码长度不为18位";
        }

    } else {
        msg = "证件号码不能为空";
    }
    list.push(result);
    list.push(msg);
    return list;
}

12. 邮箱验证

/**
 * validate email
 * @param email
 * @returns {boolean}
 */
export function validateEmail(email) {
    const re = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/
    return re.test(email)
}

13. 验证平台

/*验证pad还是pc*/
export const vaildatePc = function () {
    const userAgentInfo = navigator.userAgent;
    const Agents = ["Android", "iPhone",
        "SymbianOS", "Windows Phone",
        "iPad", "iPod"];
    let flag;
    for (var v = 0; v < Agents.length; v++) {
        if (userAgentInfo.indexOf(Agents[v]) > 0) {
            flag =  Agents(v);
            break;
        }
    }
    return flag;
}

14. 大小写

/* 小写字母*/
export function validateLowerCase(str) {
    const reg = /^[a-z]+$/
    return reg.test(str)
}
/* 大写字母*/
export function validateUpperCase(str) {
    const reg = /^[A-Z]+$/
    return reg.test(str)
}
/* 大小写字母*/
export function validatAlphabets(str) {
    const reg = /^[A-Za-z]+$/
    return reg.test(str)
}

生成随机len位数字

    /**
     * 生成随机len位数字,第二参数true时加上时间戳。
     */

export const randomLenNum = (len, date) => {
    let random = '';
    random = Math.ceil(Math.random() * 100000000000000).toString().substr(0, len ? len : 4);
    if (date) random = random + Date.now();
    return random;
}

请求的query解构成对象

parseQuery = function (query) {
    var reg = /([^=&\s]+)[=\s]*([^&\s]*)/g;
    var obj = {};
    while (reg.exec(query)) {
        obj[RegExp.$1] = decodeURI(RegExp.$2);
    }
    return obj;
}