Add a new clean_unique_id Twig filter for Html::getUniqueId

The Needs Review Queue Bot → tested this issue. It either no longer applies to Drupal core, or fails the Drupal core commit checks. Therefore, this issue status is now "Needs work".

Apart from a re-roll or rebase, this issue may need more work to address feedback in the issue or MR comments. To progress an issue, incorporate this feedback as part of the process of updating the issue. This helps other contributors to know what is outstanding.

Consult the Drupal Contributor Guide → to find step-by-step guides for working with issues.

@catch:

Overall we've been trying to reduce the usage of Html::getUniqueId() across core for several years now

Unique ID's are a major accessibility need. Is there an alternative API mechanism that the community should be exploring using here instead?

Until very recently, I don't think that I've ever worked on a theme that didn't render breadcrumbs at both the top and bottom of a page. It's been quite...cumbersome to work around this using Custom PHP on N clients. Given that we have a ~2 year grace period these days between disruptive changes within core, this is a moderately serious concern for a continuous upgrade path for folks that don't have a budget for dealing with breaking changes.

Tried to re-roll patch #24 for 11.x-dev.

I have tested #24 patch on my local and found it is working as expected. So I am moving for RTBC.

I definitely would have benefitted from this patch in the past because I would much prefer doing this in Twig than in preprocess.

Committed 677faa7 and pushed to 11.x. Also cherry-picked to 10.1.x. Thanks!

Nice improvement! I first tried to get it via 10.1.x, but it seemed like it wasn't available yet ... luckily it was ready in Drupal 11, so I could try it. This is pretty cool.

Automatically closed - issue fixed for 2 weeks with no activity.