use function for capture/restore instead of arrow function

[ryoppippi]

I would like to write the export statement for snapshot together with other export statements (e.g. export let data).
Therefore, I suggest that the capture/restore function be defined as a normal function, not as an arrow function.

[ciscoheat]

I'm not sure I understand what's the difference? The arrow function implicitly returns an object, and both functions have the same signature as the built-in version.

[ryoppippi]

I know the type signature is the same, but here is the thing

When we use the current superform's capture and restore, and we write the export let snapshot above like,

<script lang="ts">
export let data;
export const snapshot: Snapshot = { capture, restore }

const { form, errors, enhance, delayed, message, capture, restore } = superForm(data.form, {
...
})
</script>

and execute svelte check, you can see the errors like this

/private/tmp/sveltekit-superforms/src/routes/snapshot/+page.svelte:10:5
Error: Block-scoped variable 'capture' used before its declaration. (ts)
  export const snapshot: Snapshot = { capture, restore }


/private/tmp/sveltekit-superforms/src/routes/snapshot/+page.svelte:10:5
Error: Variable 'capture' is used before being assigned. (ts)
  export const snapshot: Snapshot = { capture, restore }


/private/tmp/sveltekit-superforms/src/routes/snapshot/+page.svelte:10:5
Error: Block-scoped variable 'restore' used before its declaration. (ts)
  export const snapshot: Snapshot = { capture, restore }


/private/tmp/sveltekit-superforms/src/routes/snapshot/+page.svelte:10:5
Error: Variable 'restore' is used before being assigned. (ts)
  export const snapshot: Snapshot = { capture, restore }

However, when we implement these functions by non-arrorw-function, there is no error.

This is called hoisting
https://developer.mozilla.org/en-US/docs/Glossary/Hoisting

And When we use this hoisting function, we can make the code look natural.

[ciscoheat]

Right, hoisting. That should be no problem then, it'll be included in the next patch update.