[bug] generateDocumentOutline from PrintToPDFParams not working

[nktnet1]

Unsure where the issue lies, but I can no longer generate PDF documents from HTML with bookmark/index (i.e. document outline).

Originally reported the issue in Gotenberg here:

• [Bug] generateDocumentOutline no longer works gotenberg/gotenberg#1240

However, after using git bisect, the bad commit mainly updates chromedp and cdproto:

• gotenberg/gotenberg@45f04ae

  - github.com/chromedp/cdproto v0.0.0-20250319231242-a755498943c8
  - github.com/chromedp/chromedp v0.13.3
  + github.com/chromedp/cdproto v0.0.0-20250401205909-91afd104e2b8Add commentMore actions
  + github.com/chromedp/chromedp v0.13.5

and comparing the v0.13.3 and v0.13.5 tags for chromdp yielded little results:

• chromedp/chromedp@v0.13.3...v0.13.5

  

So I suspect the issue is to do with cdproto - when comparing the cdproto version hash from gotenberg, we get:

• a755498...91afd10

Gotenberg's maintainer (gulien) also suggests that it could potentially be linked to chromedp/chromedp#1551 (comment).

[jcomack]

Ah, was already getting frustrated with myself trying to figure out what was going on. Glad it's not me.
Fingers crossed this gets resolved soon.

[nktnet1]

@jcomack you may be interested in this answer:

• [Bug] generateDocumentOutline no longer works gotenberg/gotenberg#1240 (comment)

It was discovered that the generateDocumentOutline option no longer works after a certain point, unless the generateTaggedPdf is also set to true.

I've created a linked issue in the Chromedp repository here:

• [Bug] generateDocumentOutline does not work without generateTaggedPdf for creating bookmark/index in the PDF chromedp#1625