随机密钥生成器

keyLength参数是你想要的键的字符长度

function keyGen(keyLength) {
    var i, key = "", characters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";

    var charactersLength = characters.length;

    for (i = 0; i < keyLength; i++) {
        key += characters.substr(Math.floor((Math.random() * charactersLength) + 1), 1);
    }

    return key;
}


keyGen(12)
"QEt9mYBiTpYD"

使用md5库:https://github.com/blueimp/JavaScript-MD5

最短的方法:

md5(随机数学。()

如果你想限制大小为5:

md5 (math . random())。substr (0, 5)

我认为以下是允许给定长度的最简单的解决方案:

Array(myLength).fill(0).map(x => Math.random().toString(36).charAt(2)).join('')

这取决于箭头函数的语法。

在看了这个问题的答案和其他来源的答案后，这是最简单的解决方案，同时允许修改所包含的字符和选择返回结果的长度。

// generate random string of n characters
function randomString(length) {
    const characters = '0123456789abcdefghijklmnopqrstuvwxyz'; // characters used in string
    let result = ''; // initialize the result variable passed out of the function
    for (let i = length; i > 0; i--) {
        result += characters[Math.floor(Math.random() * characters.length)];
    }
    return result;
}

console.log(randomString(6));

可以使用lodash uniqueId:

    _.uniqueId([prefix=''])

生成唯一的ID。如果给出了prefix，则ID被追加到它后面。

我只是发现了一个非常好的优雅的解决方案:

Math.random().toString(36).slice(2)

这个实现的注意事项:

This will produce a string anywhere between zero and 12 characters long, usually 11 characters, due to the fact that floating point stringification removes trailing zeros. It won't generate capital letters, only lower-case and numbers. Because the randomness comes from Math.random(), the output may be predictable and therefore not necessarily unique. Even assuming an ideal implementation, the output has at most 52 bits of entropy, which means you can expect a duplicate after around 70M strings generated.