Formatting svelte files

[agorer]

Describe the bug
When formatting a svelte files it seems like it thinks that it is a js file. Giving errors like

/Users/.../src/pages/_layout.svelte: SyntaxError: Private identifiers are not allowed outside class bodies. (9:2)
   7 | </script>
   8 |
>  9 | {#if $user.isAuthenticated}
     |  ^
  10 |   <div class="containter">
  11 |     <div>
  12 |       <slot />

Link to M-x prettier-info output
https://gist.github.com/agorer/c57f881d75d39779a1a91a71b4f8bf15

To Reproduce

1. Install svelte plugin for Prettier (https://github.com/sveltejs/prettier-plugin-svelte).
2. Create a svelte file like:

<script lang="ts">
  import { goto } from '@roxi/routify'
  import Footer from 'layout/Footer.svelte'
  import { user } from "auth/store"

</script>

{#if $user.isAuthenticated}
  <div class="containter">
    <div>
      <slot />
    </div>

    <Footer />
  </div>
{:else}
  {$goto('/auth/login')}
{/if}

3. Try to format the file within emacs.

Expected behavior
The file should be formatted according to the rules in .prettierrc

Additional context

[jscheid]

This is due to this package deriving the Prettier parser from the major mode instead of letting Prettier choose the parser.

It's something I've been meaning to change, I'll see that I can push an improvement for this soon.

As a workaround, if you use svelte-mode it should use the correct parser but I can see why you would want to use typescript-mode instead.

[agorer]

It's something I've been meaning to change, I'll see that I can push an improvement for this soon.

Thanks, looking forward to it.

As a workaround, if you use svelte-mode it should use the correct parser but I can see why you would want to use typescript-mode instead.

I am using svelte-mode, but it changes the major mode depending on where you are in the file (ts / js mode inside the script tags, svelte in the markup and css within the style tags). In fact I have just checked it and it works if I save when the cursor is located in the markup.

[jscheid]

I am using svelte-mode

Right, that's different. I've pushed a fix, it should have landed in 20210606.1152. Can you let me know if it works better?

[agorer]

Yes, it is working now anywhere in the file, thank you!