PouchDB and SvelteKit

I want to use PouchDB with SvelteKit. I have copied pouchdb-7.2.1.js to /src/libd in SvelteKit and renamed it to pouchdb.js. Pouchdb should run in the browser. Therefore I have used ssr=false to suppress server side rendering. I get the first error at the import statement. This is my first very short page (couchdb.svelte):

<script context="module">    export const ssr = false;</script><script>    import PouchDB from '$lib/pouchdb.js'; </script>

I get an error 500

import not found: PouchDB

I have tried a lot of diffent version without any success. For example:

import PouchDB from 'pouchdb-browser';  (After npm i pouchdb-browser)import PouchDB from 'pouchdb';          (After npm i pouchdb)

What is the correct way to use pouchdb?