Install uuid

Uuid javascript

function uuid() {
  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 userID=uuid();//something like: "ec0c22fa-f909-48da-92cb-db17ecdb91c5"

Uuid v4 react

npm install uuid   
import { v4 as uuidv4 } from 'uuid';

Install uuid

npm install uuid

Uuid javascript

  uuidv4() {
    return 'xxxxxxxxxxxxxxxxxxxxxxxxxxxx'.replace(/[xy]/g, (c) => {
      var r = (Math.random() * 16) | 0,
        v = c == 'x' ? r : (r & 0x3) | 0x8;
      return v.toString(16);
    });
  }

Uuid generator js

function uuidv4() {
  return ([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g, c =>
    (c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16)
  );
}

console.log(uuidv4());

Source: stackoverflow.com

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