Regarding access to arbitrary front matter items in child pages from a category index page

[allenscha]

I found out that customProps (sidebar_custom_props) has been added in order to allow access to front matter items in child pages from a category index page

#6590

and the front matter items can be accessed inside the Markdown page itself as follows:

{frontMatter.version}

But is there a way to access front matter items other than sidebar_custom_props, such as tags, in child pages from a category index page?

I'm trying to implement a filter function in a category index page based on label(s) of the child pages. However, since sidebar_custom_props only allows pairs of a key and a value, I find it difficult to use the field for multi-label filtering. So I'm trying to find if I can use tags or some other field that allows list of labels instead.

[slorber]

Not sure to understand, please create a repro with an example of what you are trying to do.

However, since sidebar_custom_props only allows pairs of a key and a value, I find it difficult to use the field for multi-label filtering

sidebar_custom_props allow key value pairs but the values can be more complex types, you can pass a Yaml array as value for example.

Tags are not added to the sidebar item props, so if you want to use tags for your filtering, you'd have to "duplicate" them:

---
id: doc-with-tags
title: A doc with tags
tags:
  - Demo
  - Getting started
sidebar_custom_props:  
  tags:
    - Demo
    - Getting started
---

In the future a createFrontMatter API would allow you to do that automatically without duplication (see #5568)

[allenscha]

Thanks for your answer. I was not aware that more complex types can be passed to the values of sidebar_custom_props, judging only from the examples on the test case code. Probably it would be better to elaborate the documentation regarding this point:
https://docusaurus.io/docs/api/plugins/@docusaurus/plugin-content-docs#sidebar_custom_props

[slorber]

Thanks @allenscha , I improved our docs here to make this clearer: #8888