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    4.0.0 • Public • Published


    TrimId is a libary that is designed to generate unique identifiers accroding to time and environment the system is working on. TrimId is inspired by MongoDB's ObjectID system and is rewritten to work on both NodeJS and browser environment.

    Data struture

    TrimId's data structure is defined as follows:

    00 01 02 03 04 05 06 07 08 09 10 11 12 13
    [  timestamp  ][machine_id][pid ][ seq   ]

    Time timestamp is a 5-bytes long unsigned integer that guarantees id will be valid till 36812/02/20T00:36:16 UTC. Machine id and pids are used to prevent collisions among generated data




    1. Use the following command to install TrimId module.
      npm install trimid
    2. Use require to obtain and use TrimId module.
      const TrimId = require('trimid');
      const new_id = TrimId.NEW;



    1. Add thw following script tag to section.
      <script src=''></script>
    2. TrimId object will be registered globally and can be used directly anywhere.
      const new_id = TrimId.NEW;


    // Generate a new id
    const newId  = TrimId.NEW; // Generate a new unique id
    // Init id from other TrimId
    const prevId = TrimId.from(newId); // Copy exising id
    // Init id from base32hex format
    // Reference:
    const base32Id = TrimId.fromHex("vvvvvvvv1b3toqg938k3ckg");
    const b32 = base32Id.toString(32);
    // Init id from base64sort format ( which uses following character map with no padding characters )
    // Characters: 0123456789=ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz
    const base64sort = TrimId.fromHex("zzzzzzw=lxle2GccC_8");
    const b64 = base64sort.toString(64);
    // Init id from hex format
    const hexId = TrimId.fromHex("0102030405060708090a0b0c0d0e");
    const hex = hexId.toString(16);
    // Init id from arbitrary Unit8Array
    const rawId = TrimId.from(new Unit8Array([0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e]));
    const bytes = new_id.toBytes();
    // Accessing the id object's meta attributes
    newId.timestamp		// 5-bytes unsigned integer, the epoch time when the object is created
    newId.machine_id	// 4-bytes unsigned integer, the machine's idenfier ( resolved from hostname )			// 2-bytes unsigned integer, the process current js engine is working on
    newId.seq			// 3-bytes unsigned integer, the sequential number that prevents unexpected collisions


    npm i trimid

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    • jcloudyu