Update install instructions for SvelteKit

[Thunderforge]

SvelteKit is now the default way to build a Svelte app. The Svelte Preprocess Markdown documentation has install instructions that are not compatible with SvelteKit (for instance, it says to edit rollup.config.js, when in SvelteKit this has been migrated to svelte.config.js.

I would like to request that the install instructions be changed to include instructions for SvelteKit.

[akauppi]

I’m sure you can provide the necessary diff as a PR. :)

[Thunderforge]

I have only been using Svelte and SvelteKit for about a week. In fact, I submitted this issue on my second day of using it because I had no idea how to install this preprocessor with SvelteKit. So it would probably be best if someone with more experience could update the documentation.

[magnus-ISU]

Would be nice if this could be done. I am also a svelte newbie wanting to create a blog as a simple ongoing project, and its unfortunate this project doesn't work anymore because it seems very useful for me.

[magnus-ISU]

Until then, it seems you can use mdsvex which has also not updated their documentation but at least has a couple of examples of it working.

[magnus-ISU]

It seems it wouldn't be that difficult to do. However, I'll probably be using mdsvex because it seems more fully featured so I won't make a MR.

[jedfoster]

FWIW, this config worked for me:

import { markdown } from 'svelte-preprocess-markdown';

const config = {
  kit: {
    // ... boilerplate SvelteKit configs
  },
  extensions: ['.svelte', '.md'],
  preprocess: [
    markdown(),
  ],
};

Here's the complete config. The relevant lines being 3 and 30-33