最近写个uni-app前端，由于要兼容小程序环境，标准几个npm里的库都不能用了。看了下网上的uuid js库，再加上short-uuid的源码。一并输入GPT敲打了几个来回后，得到这样的代码：
uuid.ts
enum UUIDFormat {CookieBase90,FlickrBase58,UUID25Base36
}const constants = {[UUIDFormat.CookieBase90]:"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!#$%&'()*+-./:<=>?@[]^_`{|}~",[UUIDFormat.FlickrBase58]: '123456789abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ',[UUIDFormat.UUID25Base36]: '0123456789abcdefghijklmnopqrstuvwxyz'
}/*** Calculate length for the shortened ID* @param {number} alphabetLength* @returns {number}*/
const getShortIdLength = (alphabetLength: number): number =>Math.ceil(Math.log2(Math.pow(2, 128)) / Math.log2(alphabetLength))/*** Convert a hex string to a custom base string* @param {string} hex* @param {string} alphabet* @returns {string}*/
const hexToCustomBase = (hex: string, alphabet: string): string => {const base = alphabet.lengthlet num = BigInt(`0x${hex}`)let encoded = ''while (num > 0) {encoded = alphabet[Number(num % BigInt(base))] + encodednum = num / BigInt(base)}return encoded
}interface PaddingParams {shortIdLength: numberconsistentLength: booleanpaddingChar: string
}/*** Takes a UUID, strips the dashes, and translates to custom base* @param {string} longId* @param {string} alphabet* @param {PaddingParams} [paddingParams]* @returns {string}*/
const shortenUUID = (longId: string, alphabet: string, paddingParams?: PaddingParams): string => {const hex = longId.replace(/-/g, '')const translated = hexToCustomBase(hex, alphabet)if (!paddingParams || !paddingParams.consistentLength) return translatedreturn translated.padStart(paddingParams.shortIdLength, paddingParams.paddingChar)
}/*** Generate a standard UUID* @returns {string}*/
const generateUUID = (): string => {const hexDigits = '0123456789abcdef'const s: string[] = Array(36).fill('')for (let i = 0; i < 36; i++) {s[i] = hexDigits.charAt(Math.floor(Math.random() * 0x10))}s[14] = '4's[19] = hexDigits.charAt((parseInt(s[19], 16) & 0x3) | 0x8)s[8] = s[13] = s[18] = s[23] = '-'return s.join('')
}/*** Generate a UUID in either standard or short format based on the provided format* @param {UUIDFormat} [format] - Enum to specify the desired format* @returns {string}*/
const uuid = (format?: UUIDFormat): string => {const standardUUID = generateUUID()if (format === undefined) {return standardUUID}const useAlphabet = constants[format]const shortIdLength = getShortIdLength(useAlphabet.length)const paddingParams: PaddingParams = {shortIdLength,consistentLength: true,paddingChar: useAlphabet[0]}return shortenUUID(standardUUID, useAlphabet, paddingParams)
}export { uuid, UUIDFormat }
测试：
console.log(uuid()) // 原版
console.log(uuid(UUIDFormat.CookieBase90)) // 可打印字符集版（20字符）
console.log(uuid(UUIDFormat.FlickrBase58)) //大小写压缩版（22字符）
console.log(uuid(UUIDFormat.UUID25Base36)) //小写数字压缩版（25字符）
输出：
fe6eee2b-f3bb-4afb-b6d1-427829aa2720
otDc4[?2Wo5JYd*F=AME
fV8nBAawjXG9dfQJvnmx6w
d4vid4vf6usa9bga6awv0jjja
奈斯~，通用4个场景
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