SPA Mode fallback page contents

[BillBuilt]

Hello,
I've been looking in to the SPA Mode and I'm really liking the idea, but still left wondering.... what is the fallback page actually supposed to contain? I have found no reference to its actual contents.

From the adapter-static github page:

The fallback page is a blank HTML page that loads your SvelteKit app and navigates to the correct route. For example Surge, a static web host, lets you add a 200.html file that will handle any requests that don't otherwise match. 

This seems a bit vague to me and not sure how it would apply to SvelteKit specifically. In the Surge example it is simply showing the HTML file as being:

<!-- 200.html -->
<script src="app.js"></script>

What would the SvelteKit equivalent be?

Thanks!

(PS: Posting a new discussion as suggested in original thread)

Originally posted by @BillBuilt in #3365 (comment)

[mossaiby]

@BillBuilt I was wondering for a long time about this; I tried to take it literally blank to start, and to my surprise, the fallback page IS CREATED for you by the adapter-static; it is not an input file you have to create! The documentation is quite cryptic on this subject. Do you want another surprise? Try NOT setting prerender: { enabled: false }! You will receive an identical fallback page in every place you have a route (.svelte file). While being messy, it is surprisingly useful; you won't need special SPA settings on your web server to avoid 404 error when the user starts from anything but the / route. @dummdidumm I will reproduce my answer if @BillBuilt opens another discussion.

Originally posted in #3365 (reply in thread)

[BillBuilt]

@mossaiby Thanks for that info! I knew I was probably over-thinking it somehow.