身份证规则+js

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

    // 加权因子
    const weight = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];
    // 校验码
    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];

    return expectedCheckCode === idCard.charAt(17).toUpperCase();
}

// 使用示例
const idCard = "11010519491231002X";
console.log(validateIDCard(idCard)); // 输出 true 或 false