身份证验证js

function validateIDCard(idCard) {
    const reg = /(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/;
    if (!reg.test(idCard)) {
        return false;
    }

    // 18位身份证校验码验证
    if (idCard.length === 18) {
        const weight = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];
        const checkCode = ['1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2'];
        let sum = 0;
        for (let i = 0; i < 17; i++) {
            sum += parseInt(idCard.charAt(i)) * weight[i];
        }
        const mod = sum % 11;
        const expectedCheckCode = checkCode[mod];
        if (idCard.charAt(17).toUpperCase() !== expectedCheckCode) {
            return false;
        }
    }

    // 出生日期验证
    const birthDate = idCard.substring(6, 14);
    const year = parseInt(birthDate.substring(0, 4));
    const month = parseInt(birthDate.substring(4, 6));
    const day = parseInt(birthDate.substring(6, 8));
    const date = new Date(year, month - 1, day);
    if (date.getFullYear() !== year || date.getMonth() + 1 !== month || date.getDate() !== day) {
        return false;
    }

    // 地区码验证（简化版）
    const areaCode = idCard.substring(0, 6);
    const validAreaCodes = ['110000', '120000', '130000', /* ... */]; // 省略其他地区码
    if (!validAreaCodes.includes(areaCode)) {
        return false;
    }

    return true;
}

// 使用示例
const idCard = '11010519491231002X';
if (validateIDCard(idCard)) {
    console.log('身份证验证通过');
} else {
    console.log('身份证验证失败');
}