SvelteKit - Function called outside component initialization

Hi

I’m trying to use sswr with a newly created SvelteKit project, building with the node adapter. I have added some simple test after having had issues:

	import { useSWR } from 'sswr';

	try {
		const { data } = useSWR('http://jsonplaceholder.typicode.com/posts/1');
	} catch(e) {
		console.log(e);
	}

test to a

• route
• component

and I always get back the same error:

Error: Function called outside component initialization
    at get_current_component (index.mjs:813)
    at onMount (index.mjs:820)
    at l.useSvelte (index.js:1)
    at useSWR (index.js:1)
    at instance ([dialogId].svelte:42)
    at init (index.mjs?v=99bae134:1660)
    at new U5BdialogIdu5D ([dialogId].svelte:153)
    at createComponent (svelte-hooks.js:136)
    at U5BdialogIdu5D.targetCmp.$replace (svelte-hooks.js:183)
    at refreshComponent (proxy.js:170)

Any idea why that might be?

[benbender]

It’s not a bug in this package, but in sveltekit. I saw the same problem on my own tinkering with react-query - so I opened a bug in sveltekit. See https://github.com/sveltejs/kit/issues/2147.

Btw, it only happens when both preconditions are true: a) lifecycle-method called inside an installed package. b) in dev-mode.

It works in svelte-repl though. So its likely a problem with the vite-dev-server.

PS: You can circumvent the bug for now by installing swrev and copy sswr to your local $lib-folder and import it from there.

[ConsoleTVs]

It’s not a bug in this package, but in sveltekit. I saw the same problem on my own tinkering with react-query - so I opened a bug in sveltekit. See https://github.com/sveltejs/kit/issues/2147.

Btw, it only happens when both preconditions are true: a) lifecycle-method called inside an installed package. b) in dev-mode.

It works in svelte-repl though. So its likely a problem with the vite-dev-server.

PS: You can circumvent the bug for now by installing swrev and copy sswr to your local $lib-folder and import it from there.

That could explain why my local symlinked pkg was working lol