How can I suppress custom title-metadata.html template values from book output pages?

[mattpollock]

Description

I have created a new title-metadata.html partial modifying this source. I added various custom fields I wanted in the title block, similar to #3974 and #6756.

I'm supporting rather long documents and so need to extend the quarto book project type.

This works great on my index.html output

However, while the default title metadata elements (author, published, abstract) are removed for subsequent pages of the book, the custom additions I made are not

My goal here is to suppress the extra metadata on all pages except index.html just like author, published, and abstract are already suppressed.

I suspect that I need a lua filter somewhere to handle this, but after some digging I have been unable to find the one that handles removing the standard book entries.

Reproducible Example

Please see https://github.com/mattpollock/quarto-custom-metadata for a reproducible example. This example illustrates the problem and the solution @mcanouil proposed. I'm still curious if the same mechanism quarto book uses for its standard metadata fields (e.g., "author") could be used in lieu of the include-in-header CSS trick.

[mcanouil]

Use display: none CSS trick.

[mattpollock]

Thanks. So referencing this and your other answer, I was able to get the correct output in my introduction chapter using:

---
include-in-header:
  - text: |
      <style>
      .quarto-title-meta-heading {
        display: none;
      }
      .quarto-title-meta-contents {
        display: none;
      }
      </style>
---

However it's not great to need to add that block to every qmd document in my book other than index.qmd. So I added the above include-in-header block to my extension yaml in the "formats": {"html": { ... }} section, and disabled it only within my index.qmd using:

---
include-in-header:
  - text: |
      <style>
      .quarto-title-meta-heading {
        display: contents;
      }
      .quarto-title-meta-contents {
        display: contents;
      }
      </style>
---

This is better, but probably still not quite as good as piggy-backing on whatever quarto-book is already doing to suppress author, published, and abstract. I'll leave the discussion open for a day or two in case anybody can point out the way to do that.

[mcanouil]

FYI, using "this", "this source" is not accessible as it does not convey any meaning.
Use meaningful text to make your content accessible.

Additionally, I only provided one possible solution and no really specific solution was possible without requiring a lot of extra work since you did not provide anything that could be used, such as a small reproducible example.

[mattpollock]

I updated the question. A runnable example is available at https://github.com/mattpollock/quarto-custom-metadata