Angular 6 自定义校验器校验身份证

/**
 * 自定义身份校验器
 * */
import { FormControl} from \'@angular/forms\';
export function identityNoValidator(input: FormControl) {
    const value = input.value;
    if (checkCode(value)) {
        console.log(\'checkCode\');
        let date = value.substring(6, 14);
        if (checkDate(date)) {
            console.log(\'checkDate\');
            if (checkPro(value.substring(0, 2))) {
                console.log(\'checkPro\');
                    return null;
            } else {
                return {\'errors\': true};
            }
        } else {
            return {\'errors\': true};
        }
    } else {
        return {\'errors\': true};
    }
}
function checkCode(val: string) {
    let reg = /^[1-9]\d{5}(18|19|20)\d{2}((0[1-9])|(1[0-2]))(([0-2][1-9])|10|20|30|31)\d{3}[0-9Xx]$/;
    // 17 位加权因子
    let divisor = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];
    // 校验码列表mod11,对应校验码字符值
    let validCode = [\'1\', \'0\', \'X\', \'9\', \'8\', \'7\', \'6\', \'5\', \'4\', \'3\', \'2\'];
    if (!reg.test(val)) {
        console.log(\'正则表达式未通过\');
        return false;
    } else {
        let sum = 0;
        for (let i = 0; i < 17; i++) {
            // 17位每一位数 乘以加权因子 的 和
            sum += Number.parseInt(val[i]) * divisor[i];
        }
        let index = sum % 11;
        return validCode[index].toUpperCase() === val[17];
    }

}
// 检查日期
function checkDate(val: string) {
    const pattern = /^(18|19|20)\d{2}((0[1-9])|(1[0-2]))(([0-2][1-9])|10|20|30|31)$/;
    if (pattern.test(val)) {
        const year = val.substring(0, 4);
        const month = val.substring(4, 6);
        const date = val.substring(6, 8);
        const date2 = new Date(year + \'-\' + month + \'-\' + date);
        return date2 && date2.getMonth() === (parseInt(month) - 1);
    }
    return false;
}
// 检查省市编号
function  checkPro(val: string) {
    const pattern = /^[1-9][0-9]/;
    const provs = {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\'};
    if (pattern.test(val)) {
        return !!provs[val];
    }
    return false;
}

　　使用该校验器

this.validateForm.get(\'corporation_credentials_number\').setValidators(identityNoValidator);