js生成随机数串

function generateRandomString(length, chars) {
    let result = '';
    const charactersLength = chars.length;
    for (let i = 0; i < length; i++) {
        result += chars.charAt(Math.floor(Math.random() * charactersLength));
    }
    return result;
}

// 使用示例
const length = 16; // 生成的字符串长度
const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'; // 字符集
const randomString = generateRandomString(length, chars);
console.log(randomString); // 输出类似 "aB3dE5fG7hJ9kLmN"

function generateSecureRandomString(length, chars) {
    let result = '';
    const charactersLength = chars.length;
    const randomValues = new Uint32Array(length);
    window.crypto.getRandomValues(randomValues);
    for (let i = 0; i < length; i++) {
        result += chars.charAt(randomValues[i] % charactersLength);
    }
    return result;
}

// 使用示例
const secureRandomString = generateSecureRandomString(length, chars);
console.log(secureRandomString); // 输出类似 "aB3dE5fG7hJ9kLmN"