Vue学习笔记-身份证规则校验

// 身份证验证
Vue.prototype.$checkIdCard = function(idCard){
    let _this = this;
    let bbd = ''; // 出生日期
    let sex = ''; // 性别
    let canPass = true;
    idCard = idCard.toUpperCase();  // 转大写
    let len = idCard.length;
    let city={11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",21:"辽宁",22:"吉林",23:"黑龙江 ",31:"上海",32:"江苏",
        33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",42:"湖北 ",43:"湖南",44:"广东",45:"广西",46:"海南",
        50:"重庆",51:"四川",52:"贵州",53:"云南",54:"西藏 ",61:"陕西",62:"甘肃",63:"青海",64:"宁夏",65:"新疆",71:"台湾",
        81:"香港",82:"澳门",91:"国外"};
    //1. 判断长度
    if (len !== 15 && len !== 18){
        _this.$toast.error('身份证号长度不正确！');
        canPass = false;
    }
    //2. 身份证号码为15位或者18位，15位时全为数字，18位前17位为数字，最后一位是校验位，可能为数字或字符X。
    if (!(/(^\d{15})|(^̲\d{17}([0-9]|X))/.test(idCard))) {
        _this.$toast.error('身份证号格式错误！');
        canPass = false;
    }
    //3. 地址码
    if (!city[idCard.substr(0,2)]){
        _this.$toast.error('身份证号地址码不正确！');
        canPass = false;
    }

    let re;
    //4. 生日
    if (len === 15) {
        re = new RegExp(/^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/);
        let arrSplit = idCard.match(re);

        //检查生日日期是否正确
        let birth = new Date('19' + arrSplit[2] + '/' + arrSplit[3] + '/' +arrSplit[4]);
        let isBirth = (birth.getYear() === Number(arrSplit[2])) && ((birth.getMonth() + 1) === Number(arrSplit[3])) && (birth.getDate() === Number(arrSplit[4]));
        if (!isBirth) {
            _this.$toast.error('身份证号出生日期不对！');
            canPass = false;
        }
        bbd = birth;
    } else if (len === 18) {
        re = new RegExp(/^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/);
        let arrSplit = idCard.match(re);

        //检查生日日期是否正确
        let birth = new Date(arrSplit[2] + "/" + arrSplit[3] + "/" +arrSplit[4]);
        let isBirth = (birth.getFullYear() === Number(arrSplit[2])) && ((birth.getMonth() + 1) === Number(arrSplit[3]))
            && (birth.getDate() === Number(arrSplit[4]) && (birth.getTime()