身份证号码正则表达式 js

const idCardRegex = /(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/;

function validateIDCard(idCard) {
    const idCardRegex = /(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/;
    if (!idCardRegex.test(idCard)) {
        return false;
    }
    // 进一步验证18位身份证号码的校验码
    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;
        return checkCode[mod] === idCard.charAt(17).toUpperCase();
    }
    return true;
}

// 测试
console.log(validateIDCard("11010519491231002X")); // true
console.log(validateIDCard("110105194912310021")); // false