Errors upon encountering schema.org markup

[benmccann]

Describe the bug

Google recommends using schema.org JSON-LD markup so that they can better understand your website, but svelte-preprocess barfs upon encountering it

Logs

The error was encountered at:

node_modules/svelte-preprocess/dist/autoProcess.js:36:77

svelte-preprocess/src/autoProcess.ts

Line 72 in 5fe9a43

// todo: maybe add a try-catch here looking for module-not-found errors

To Reproduce

Paste the example <script type="application/ld+json"> from https://developers.google.com/search/docs/guides/intro-structured-data into an app

Expected behavior

svelte-preprocess should proceed silently when encountering an unrecognized script type

Stack

Build Error: @snowpack/plugin-svelte
Error: Cannot find module './transformers/ld+json'
Require stack:
- node_modules/svelte-preprocess/dist/autoProcess.js
- c3-next/node_modules/svelte-preprocess/dist/index.js
- c3-next/svelte.config.js
- c3-next/@root

[benmccann]

I found it can be worked around with the preserve option: https://github.com/sveltejs/svelte-preprocess/blob/main/docs/preprocessing.md#auto-preprocessing-options

[kaisermann]

Hmmmm, should the preserve property have default values such as ld+json? I don't see a case where we would want to parse a script with type application/ld+json

[benmccann]

I think I'd probably just ignore unrecognized language types instead since it'd probably be hard to come up with a complete list of ones to whitelist

[kaisermann]

@benmccann That makes total sense 😅 will do it soon.

[Antoine-lb]

I found it can be worked around with the preserve option: https://github.com/sveltejs/svelte-preprocess/blob/main/docs/preprocessing.md#auto-preprocessing-options

@benmccann 's answer is good (e.g. it compiles), but is probably not enough if you are trying to make a schema dynamically.

I found an article that really nailed the job for me so I just wanted to share:
https://navillus.dev/blog/json-ld-in-sveltekit