javascriptcouchdbsveltesveltekitpouchdb

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?


Solution

  • Here is a work-around that uses PouchDB via a script tag:

    index.svelte:

    <script>
        import { onMount } from 'svelte'
    
        // Ensure execution only on the browser, after the pouchdb script has loaded.
        onMount(async function() {
            var db = new PouchDB('my_database');
            console.log({PouchDB})
            console.log({db})
        });
    </script>
    
    
    <svelte:head>
        <script src="//cdn.jsdelivr.net/npm/pouchdb@7.2.1/dist/pouchdb.min.js"></script>
    </svelte:head>
    

    When imported, PouchDB seems to expect a certain environment that Svelte/Vite/Rollup does not provide. (Svelte/Vite is happiest with proper ESM modules; PouchDB seems to be a "window.global" script that was converted to a JS module.)

    There may be a way to modify the configuration to create the environment expected by PouchDB. I think you would have to modify the svelte.config.cjs file. (Specifically the vite section that determines the rollup configuration.)

    You might find some hints in this related issue for PouchDB + Angular.

    I would just use the <script> work-around above.