import uuid from 'uuid/v4' code example

Example 1: uuid v4 react

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

Example 2: uuid react

import React from 'react'
import uuid from 'react-uuid'

const array = ['one', 'two', 'three']

export const LineItem = item => <li key={uuid()}>{item}</li>

export const List = () => array.map(item => <LineItem item={item} />)

Example 3: 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);
    });
  }

Example 4: 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());