var guid = createMyGuid();

function createMyGuid()  
{  
   return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {  
      var r = Math.random()*16|0, v = c === 'x' ? r : (r&0x3|0x8);  
      return v.toString(16);  
   });  
}

var guid = createMyGuid();

function createMyGuid()  
{  
   return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {  
      var r = Math.random()*16|0, v = c === 'x' ? r : (r&0x3|0x8);  
      return v.toString(16);  
   });  
}

  // RFC 4122
  //
  // A UUID is 128 bits long
  //
  // String representation is five fields of 4, 2, 2, 2, and 6 bytes.
  // Fields represented as lowercase, zero-filled, hexadecimal strings, and
  // are separated by dash characters
  //
  // A version 4 UUID is generated by setting all but six bits to randomly
  // chosen values
  var uuid = [
    Math.random().toString(16).slice(2, 10),
    Math.random().toString(16).slice(2, 6),

    // Set the four most significant bits (bits 12 through 15) of the
    // time_hi_and_version field to the 4-bit version number from Section
    // 4.1.3
    (Math.random() * .0625 /* 0x.1 */ + .25 /* 0x.4 */).toString(16).slice(2, 6),

    // Set the two most significant bits (bits 6 and 7) of the
    // clock_seq_hi_and_reserved to zero and one, respectively
    (Math.random() * .25 /* 0x.4 */ + .5 /* 0x.8 */).toString(16).slice(2, 6),

    Math.random().toString(16).slice(2, 14)].join('-');

它提供简单,快速的生成RFC4122 UUIDS。

特性:

创建 RFC4122 版本 1 或版本 4 UUIDs 在 Node.js 和浏览器中运行. 在支持平台上加密强大的随机 # 发行。

使用 NPM 安装:

npm install uuid

或者通过浏览器使用 uuid:

下载原始文件(uuid v1): https://raw.githubusercontent.com/kelektiv/node-uuid/master/v1.js 下载原始文件(uuid v4): https://raw.githubusercontent.com/kelektiv/node-uuid/master/v4.js

想要更小? 查看此: https://gist.github.com/jed/982883

使用:

// Generate a v1 UUID (time-based)
const uuidV1 = require('uuid/v1');
uuidV1(); // -> '6c84fb90-12c4-11e1-840d-7b25c5ee775a'

// Generate a v4 UUID (random)
const uuidV4 = require('uuid/v4');
uuidV4(); // -> '110ec58a-a0f2-4ac4-8393-c866d813b8d1'

// Generate a v5 UUID (namespace)
const uuidV5 = require('uuid/v5');

// ... using predefined DNS namespace (for domain names)
uuidV5('hello.example.com', v5.DNS)); // -> 'fdda765f-fc57-5604-a269-52a7df8164ec'

// ... using predefined URL namespace (for, well, URLs)
uuidV5('http://example.com/hello', v5.URL); // -> '3bbcee75-cecc-5b56-8031-b6641c1ed1f1'

// ... using a custom namespace
const MY_NAMESPACE = '(previously generated unique uuid string)';
uuidV5('hello', MY_NAMESPACE); // -> '90123e1c-7512-523e-bb28-76fab9f2f73d'

ECMAScript 2015(ES6):

import uuid from 'uuid/v4';
const id = uuid();

来自Sagi shkedy的技术博客:

function generateGuid() {
  var result, i, j;
  result = '';
  for(j=0; j<32; j++) {
    if( j == 8 || j == 12 || j == 16 || j == 20)
      result = result + '-';
    i = Math.floor(Math.random()*16).toString(16).toUpperCase();
    result = result + i;
  }
  return result;
}

还有其他方法涉及使用 ActiveX 控制,但远离这些!

我以为值得指出的是,没有GUID发电机可以保证独特的钥匙(查看维基百科文章)。总是有冲突的可能性。

这也适用于Node.js,如果您更换了Let Buffer = 新 Uint8Array(); crypto.getRandomValues 与Let Buffer = crypto.randomBytes(16)

它应该在性能中打击最常见的表达解决方案。

const hex = '0123456789ABCDEF' let generateToken = function() { let buffer = new Uint8Array(16) crypto.getRandomValues(buffer) buffer[6] = 0x40 (buffer[6] & 0xF) buffer[8] = 0x80 (buffer[8] & 0xF) let segments = [] for (let i = 0; i < 16; ++i) { segments.push(hex[(buffer[i] >> 4 & 0xF)]) segments.push(hex[(buffer[i] >> 0 & 0xF)])) if (i ==

表演图(每个人都喜欢它们):JSbench