Generic parameters being removed

[bryanforbes]

Given the following sveltekit file:

<script lang="ts">
  import { page } from '$app/state';
  import { resolve } from '$app/paths';
</script>

<a href={resolve('/[foo]/[bar]/[baz]', { ...(page.params as Required<typeof page.params>), baz: 2 })}>Go</a>

and the following config:

/**
 * @see https://prettier.io/docs/configuration
 * @type {import("prettier").Config}
 */
export default {
  singleQuote: true,
  printWidth: 100,
  plugins: ['prettier-plugin-svelte'],
  overrides: [{ files: '*.svelte', options: { parser: 'svelte' } }],
};

Prettier 3.7.3 and prettier-plugin-svelte 3.4.0 remove the generic passed to Required:

<script lang="ts">
  import { page } from '$app/state';
  import { resolve } from '$app/paths';
</script>

<a href={resolve('/[foo]/[bar]/[baz]', { ...(page.params as Required), baz: 2 })}>Go</a>

The only work-around I've found for now is to declare the type in the script block:

<script lang="ts">
  import { page } from '$app/state';
  import { resolve } from '$app/paths';

  type RequiredParameters = Required<typeof page.params>;
</script>

<a href={resolve('/[foo]/[bar]/[baz]', { ...(page.params as RequiredParameters), baz: 2 })}>Go</a>

[timc13]

I'm noticing this in my shadcn components too

{#snippet Button({ props }: { props?: Record<string, unknown> })}
  ...
{/snippet}

is being stripped to

{#snippet Button({ props }: { props?: Record })}
  ...
{/snippet}

which is invalid TS

[ryanbmarx]

I'm noticing the same thing in my shad and own components.

- {#snippet asyncList(dataPromise: Promise<FollowupTask[]>, noneMessage = 'None available')}
+ {#snippet asyncList(dataPromise: Promise, noneMessage = 'None available')}