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How to use the v4 function from uuid

Find comprehensive JavaScript uuid.v4 code examples handpicked from public code repositorys.

uuid.v4 is a function that generates a version 4 UUID, which is a 128-bit identifier that is generated using pseudo-random numbers.

lib.js

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function hash(algo, string) {
    return crypto.createHash(algo).update(string).digest("hex");
}


const getUUID = uuid.v4;


function logIOC(type, value, description) {
    log("info", "IOC: " + description);
    IOC.push({type, value, description});

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index.js

GitHub: codergautam/swordbattle.io

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  if (!match){
    res.send({error: "Invalid password"});
		return;
  };


  newSecret = uuid.v4()
  newAccount = await sql`UPDATE accounts SET password=${bcrypt.hashSync(req.body.newPass, 10)}, secret=${newSecret} WHERE secret=${req.body.secret}`
  res.send({"Success": true, "secret": newSecret})
});

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+ 3 other calls in file

How does uuid.v4 work?

uuid.v4 is a function that generates a version 4 UUID, which is a type of UUID that uses randomly or pseudo-randomly generated values to create a 128-bit identifier. To generate a version 4 UUID, the uuid.v4 function will use a high-quality random number generator to generate 122 bits of random data. It then sets the two most significant bits of the first octet to 0 and 1, respectively, to indicate that this is a version 4 UUID. Finally, the function formats the resulting 128-bit value as a string in the canonical format, which is a sequence of 32 hexadecimal digits separated by hyphens into five groups with 8, 4, 4, 4, and 12 hexadecimal digits, respectively. This format is compatible with the UUID standard defined by RFC 4122, which specifies how UUIDs should be represented and used in software systems.

userController.js

GitHub: CTF-Cafe/CTF_Cafe_platform

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// if (defaultAdminCheck) {
//     throw new Error('Change the default admins password first!');
// }

// Create new User
const newKey = v4();

await users
  .create({
    username: username,

+ 8 other calls in file

developer.test.js

GitHub: Planning-Inspectorate/appeal-planning-decision

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});


describe.skip('Final comments', () => {
	it('should return a final comment entity and email the secure code for it to the appellant when requested, after creating the entity', async () => {
		// Given: a request to create a final comments entry for a case
		const caseReference = uuid.v4();
		const appellantEmail = 'foo@bar.com';


		// And: the final comments end date is set in the future
		await mockedExternalApis.mockHorizonGetCaseResponse(new Date(2100, 12, 31, 0, 0, 0), 200);

+ 8 other calls in file

Ai Example

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const { v4: uuidv4 } = require("uuid");

const id = uuidv4();

console.log(id);

In this example, we use the uuid library to generate a version 4 UUID using the uuidv4() function. The resulting id variable is a string that represents a unique identifier based on pseudo-random numbers. The format of the UUID will look something like this: Copy code

main.js

GitHub: SandwichFox/MBCord

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	type: 'boolean',
	default: false
},
UUID: {
	type: 'string',
	default: v4()
},
doDisplayStatus: {
	type: 'boolean',
	default: true

jsonrpc.js

GitHub: softwaregroup-bg/ut-bus

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dispenser
    .on('part', part => {
        if (part.name && typeof params[part.name] === 'undefined') {
            // if (!isUploadValid(part.fileName, port.config.fileUpload)) return h.response('Invalid file name').code(400);
            files.push(new Promise((resolve, reject) => {
                const filename = workDir + '/' + uuid.v4() + '.upload';
                set(params, part.name, {
                    originalFilename: part.filename,
                    headers: part.headers,
                    filename

+ 11 other calls in file

draft.js

GitHub: YASH1730/eCommerce-for-Bitwit-Backend-WS

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  data.message = `Alert : Polish ${req.body._id} updating request.`;

  data.payload = req.body;
  break;
case "insertBlog":
  req.body.uuid = uuid.v4();

  if (req.files["banner_image"] === undefined)
    return res.status(203).send({ message: "Image Is Required !!!" });
  req.body.card_image = `${process.env.Official}/${req.files["banner_image"][0].path}`;

+ 2 other calls in file

LoginController.js

GitHub: TheLaxus/HylibServer

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const crypto = require('crypto')
var mt = require('../modules/mt_rand');


const i18n = require('../translation/i18n');
const uuid = require('uuid');
const deviceId = uuid.v4();


function generateToken(params = {}) {
    return jwt.sign(params, auth.jwt_secret_key, {
        expiresIn: '1d' // 1day

All.test.js

GitHub: luca-soda/strapi-handler

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Object.defineProperty(exports, "__esModule", { value: true });
const StrapiHandler = require("./StrapiHandler");
const uuidLib = require("uuid");
const axios_1 = __importDefault(require("axios"));
const Interfaces_1 = require("./Interfaces");
const uuidv4 = uuidLib.v4;
const { IS_EQUAL_TO } = Interfaces_1.FilterOperator;
const strapiUrl = 'http://127.0.0.1:7125';
const apiKey = '37a9dca00ffbd809de068adf97ae7b4bcc0b78a3102798fd393d7126da8984fbf563e6ebf6e507e3fc93970b9971ecee6175096e85523169d6feea6f89d2d15ccafcf6ad4e7adcab5c99c6146e959a4106e92c619933a050d558f692afaf2a703ad55c151ebf90485fab1e7a61f035b722177cec37f9037ee3292d8e2c1a160b';
const tests = 'Tests';

+ 2 other calls in file

index.js

GitHub: brianmarete/gallery

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// res.send("test");
if (req.file == undefined){
    res.redirect('/?msg=Error: No file selcted!');
}else{
    // const imageObj = {
    //     id: uuid.v4(),
    //     name: req.file.filename,
    //     path: 'images/' + req.file.filename
    // }
    // db.push(imageObj);

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dataLayer.js

GitHub: cds-snc/forms-terraform

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) {
  const formIdentifier = typeof formID === "string" ? formID : formID.toString();
  const formSubmission =
    typeof formResponse === "string" ? formResponse : JSON.stringify(formResponse);


  const confirmationCode = uuid.v4();
  const submissionDate = new Date(Number(createdAt));


  let duplicateFound = false;
  let writeSucessfull = false;

application-api-wrapper.js

GitHub: Planning-Inspectorate/applications-service

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	path,
	method = 'GET',
	opts = {},
	headers = { 'Content-Type': 'application/json' }
) {
	const correlationId = uuid.v4();
	const url = `${config.applications.url}${path}`;


	const logger = parentLogger.child({
		correlationId,

entry.js

GitHub: NikFranki/node-in-action

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if (sheets.length > 0) {
  const data = XLSX.utils.sheet_to_json(wb.Sheets[sheets[0]]);
  const values = data
    .map((row) => ([
      uuid.v4(),
      row['content'],
      row['status'],
      row['position_id'],
      row['folder_id'],

+ 5 other calls in file

index.js

GitHub: RiversideValley/Plaza

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 * @param {any} req
 * @param {any} res
 * @param {function(Error=): void}
 */
const setRequestId = (req, res, next) => {
  req.requestId = uuid.v4();
  res.header('X-Request-Id', req.requestId);

  next();
};

+ 5 other calls in file

Mailer.test.js

GitHub: usil/seleniumjs4all

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    filename: "test-report",
    sourcePath: path.resolve(__dirname, "mocks", "test-report.zip"),
    suiteIdentifier: "aabbcc"
}
let testAccount = await nodemailer.createTestAccount();
const uuid = v4();
const status = "Success";
const body = "There aren't errors";
const smtpParams = {
    enableSmtpNotification: true,

cookie.js

GitHub: adobe/konductor-server-side-demo

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module.exports = {
    getOrSetCookie: (req, res) => {
        let cgid
        if (req.cookies[cookieName] === undefined) {
            cgid = uuid.v4()
            console.log(`creating CGID: ${cgid}`)
            res.cookie(cookieName, cgid, cookieOptions)
        } else {
            cgid = req.cookies[cookieName]

+ 5 other calls in file

courses_controller.js

GitHub: Ibrokhim3/courses_express

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//     const { id } = userData[0];

//     let courses = read_file("courses.json");

//     courses.push({
//       id: v4(),
//       user_id: id,
//       title,
//       price,
//       author,

Entity.js

GitHub: SerhiiKudria/project

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  if (typeof generate === 'function') {
    value = await generate();
  } else if (generate === 'increment') {
    value = await this.nextId();
  } else if (generate === 'uuid') {
    value = uuid.v4();
  }
  value && Object.assign(primaryKeys, { [field]: value });
}
return primaryKeys;

+ 5 other calls in file

tcp-server.js

GitHub: narainsagar/vehicle_gateway_server

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  process.env.REDIS_PUBSUB_CHANNEL || "VehicleServers";


const clientSockets = {}; // Map of client IDs to socket objects
const server = net.createServer();
// Generate a unique identifier for the client
const serverIdentifier = uuid.v4();


// Redis Publisher
const redisPublisher = new Redis(REDIS_PORT, REDIS_HOST);
// Send messages to the client when `redisPublisher` publishes to the channel

index.js

GitHub: chsaqib/ci

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}


function requestIdMiddleware(request, response, next) {
  let requestId = request.header("X-Request-ID");
  if (!requestId) {
    requestId = uuid.v4();
    response.header("X-Request-ID", requestId);
  }


  request.context = request.context || {};

Other functions in uuid

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