Svokit.io

This module allows socket.io to bind to a sveltekit (vite) server Start by initializing a sveltekit server: npm create @svelte-add/kit@latest Next, install this library: npm i svokit@latest

Config

To initialize svokit, you'll need to create a svokit config, and apply the plugin to the vite config:

svokit.config.mjs

import { defineConfig } from "svokit"
// code here must be written in mjs compatible format, $lib does not apply here.
export default defineConfig({
    out: 'build', // Same as out in svelte config
    mount(io, server/*optional*/) {
		// socket.io code here
        console.log(io)
    }
})

vite.config.cjs

import { sveltekit } from '@sveltejs/kit/vite';
import svokit from 'svokit';

/** @type {import('vite').UserConfig} */
const config = {
	// ...
	plugins: [sveltekit(), svokit(), /*...*/]
}

export default config;

Your svelte.config.js should look similar to this

import adapter from '@sveltejs/adapter-node'; //? Only works with adapter node
import preprocess from 'svelte-preprocess';

/** @type {import('@sveltejs/kit').Config} */
const config = {
	// ...
	kit: {
		// ...
		adapter: adapter({
			out: "build" //? should be the same as out in svokit config 
		})
	}
};

export default config;

Make sure @sveltejs/adapter-node is installed in lieu of @sveltejs/adapter-auto that comes with svelte-add

To run the built app, instead of running node buildfolder, run npx svokit, or just svokit in package scripts.