JavaScript generation uuid (Method 1)

You can create a UUID directly online, preview it,

This site is good, you can choose the UUID version, you can also directly remove the underline, easy to use Ah, haha
http://www.uuid.online/

　　

/*! Math.uuid.js (v1.4) http://www.broofa.commailto:[email protected] Copyright (c) Robert kiefferdual licensed Under the MIT and GPL licenses.*//* * Generate a random uuid. * * USAGE:MATH.UUID (length, radix) * Length-the desired number of characters * radix-the number of allowable Val UEs for each character. * * EXAMPLES: *//No arguments-returns RFC4122, version 4 ID * >>> math.uuid () * "92329d39-6f5c-4520-ab fc-aab64544e172 "* *//One argument-returns ID of the specified length * >>> math.uuid (All)//Chara Cter ID (default base=62) * "VCYDXGLTXRVZSTV" * *///arguments-returns ID of the specified length, and radix. (Radix must be <=) * >>> Math.uuid (8, 2)//8 character ID (base=2) * "01001010" * >>> Math   . UUID (8, ten)//8 character ID (base=10) * "47473046" * >>> Math.uuid (8, +)//8 character ID (base=16) * "098f4d35" */(function () {//Private array of chars to use VAr CHARS = ' 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz '. Split (');    Math.uuid = function (len, radix) {var chars = chars, uuid = [], I; Radix = Radix | |     Chars.length; if (len) {//Compact form for (i = 0; i < len; i++) uuid[i] = Chars[0 |    Math.random () *radix];       } else {//rfc4122, version 4 form var R;      rfc4122 requires these characters uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-';       UUID[14] = ' 4 ';  Fill in random data.        At i==19 set the high bits of clock sequence AS//per rfc4122, Sec. 4.1.5 for (i = 0; i <; i++) { if (!uuid[i]) {r = 0 |          Math.random () *16; Uuid[i] = chars[(i = = 19)? (R & 0x3) |        0X8:R];  }}} return Uuid.join (");   };  A more performant, but slightly bulkier, rfc4122v4 solution. We boost performance//by minimizing calls to random () Math.uuidfast = function () {var chars = chars, uuid = new Ar Ray (rnd=),0, R;  for (var i = 0; i < i++) {if (i==8 | | i==13 | | i==18 | |      i==23) {Uuid[i] = '-';      } else if (i==14) {uuid[i] = ' 4 ';        } else {if (rnd <= 0x02) rnd = 0x2000000 + (math.random () *0x1000000) |        r = rnd & 0xf;        Rnd = Rnd >> 4; Uuid[i] = chars[(i = = 19)? (R & 0x3) |      0X8:R];  }} return Uuid.join (");   }; A more compact, but less performant, rfc4122v4 solution:Math.uuidCompact = function () {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);  }); };}) ();

　　

Calling method: Math.uuid ()

JavaScript generation uuid (Method 1)