vite+svelte+pouchdb: Uncaught TypeError: Class extends value [object Object] is not a constructor or null

I am trying to setup a bare minimum configuration using Svelte + PouchDB and running into the above error in the browser. Please see below the steps to reproduce the issue.

Steps to reproduce:

1. Create a bare-bones Vite Scaffold project using Svelte template and verify that it works as expected in the browser

$ npm create vite@latest pouchdb-test -- --template svelte$ cd pouchdb-test$ npm install$ npm run dev

2. Install PouchDB (or pouchdb-browser, the issue is reproduced just the same)$ npm install --save pouchdb

3. Create a DB using PouchDB (Lines 2 and 3 below were added by me. Other lines were present as-is.)

# src/lib/Counter.svelte<script>    import PouchDB from "pouchdb"; // <--- or "pouchdb-browser" if that is installed    const db = new PouchDB('myDB'); // <--- Add this line too    let count = 0    const increment = () => {        count += 1    }</script><button on:click={increment}>    count is {count}</button>

4. Update vite.config.js (Line 7 was added by me. Others were already present.)

# vite.config.jsimport {defineConfig} from 'vite';import {svelte} from '@sveltejs/vite-plugin-svelte';// https://vitejs.dev/config/export default defineConfig({    plugins: [svelte()],    define: {global: {}}   // <--- Add this line. If not present then this exception occurs:                          // Uncaught ReferenceError: global is not defined                          //    at node_modules/immediate/lib/mutation.js (mutation.js:6:16)                          //    at __require (chunk-DFKQJ226.js?v=c3a35530:8:50)                          //    at node_modules/immediate/lib/index.js (index.js:5:3)                          //    at __require (chunk-DFKQJ226.js?v=c3a35530:8:50)                          //    at index-browser.es.js:1:23});

5. Rebuild the program and open the app (http://127.0.0.1:5173) in browser. If you inspect the console then this Exception is thrown: Uncaught TypeError: Class extends value [object Object] is not a constructor or null at index-browser.es.js:457:23

I am unable to understand why this error occurs and how to solve it. Any help or pointers is most welcome.