Certain URL fragments cause javascript error

Thanks for rerolling. This still needs a test to exercise the broken behaviour and prove that we have fixed it with the patch.

conflicts with 📌 Replace deprecated String.prototype.substr() with String.prototype.substring() Fixed . rerolled in a merge request. not sure what a test would look like so just the reroll atm.

Patch 46 adapted for Drupal 10.2.4.

The patch from #52 applied cleanly to Drupal 10.2.5.

yash.rode → made their first commit to this issue’s fork.

Hi, I was trying to reproduce this issue in Drupal Core, where I can click on any button which takes me to the link with a fragment?
I am trying to write the test, but not sure what should be the Drupal page where I can get this error which I can convert to test.

Not sure of a common real case but I was able recreate this just now like this.

1. Install Drupal site.
2. Ensure registration is allowed.
3. Log out and visit the registration url with a complex url fragment. e.g. https://d10.lndo.site/en/user/register/#badfragment/broken

Hi I tried the steps above but the issue only occurs when we try to change the URL and not when we visit the URL for the first time?
If that is the expected behaviour how can we write a test for that scenario?