Error "500 item is not defined" when add spinner

[brud]

When I add spinner inside a slidy tag:

<Slidy {...slidy_default}>
  <span slot="loader">
    <Spinner/>
  </span>
</Slidy>

error appears:

item is not defined
ReferenceError: item is not defined
    at eval (/node_modules/svelte-slidy/src/Slidy.svelte:414:91)
    at Object.$$render (C:\Users\brud9\projects\_vitbad\node_modules\svelte\internal\index.js:1412:22)
    at index.svelte:60:11
    at Object.$$render (C:\Users\brud9\projects\_vitbad\node_modules\svelte\internal\index.js:1412:22)
    at Object.default (root.svelte:38:46)
    at eval (C:\Users\brud9\projects\_vitbad\src\routes\$layout.svelte:26:66)
    at Object.$$render (C:\Users\brud9\projects\_vitbad\node_modules\svelte\internal\index.js:1412:22)
    at root.svelte:36:44
    at $$render (C:\Users\brud9\projects\_vitbad\node_modules\svelte\internal\index.js:1412:22)
    at Object.render (C:\Users\brud9\projects\_vitbad\node_modules\svelte\internal\index.js:1420:26)

I was trying to add let:item but no result.

Slidy v. 2.6.3
Svelte v. 3.38.1
SvelteKit v. 1.0.0-next.95

[brud]

It looks like SSR issue, for now I create a monkey patch:

<style lang="stylus">
	.preloader
		width 100%
		height 49vh // same as wrap in slidy options
		display flex
		justify-content center
		align-items center
</style>

{#if (browser) }
	<Slidy {...slidy_default}>
		<span slot="loader">
			<Spinner/>
		</span>
	</Slidy>
{:else }
	<div class="preloader">
		<Spinner/>
	</div>
{/if}

[Valexr]

Tx for SSR testing... I thinking what can I do for this issue...
& it's not monkey patch - it recommended setting 🤓 in SvelteKit

[Valexr]

it's true way {#if (browser) } for realise loader behaviour in SSR mode in SvelteKit.
I'm close this issue... if you have other questions, welcome 🤓