HTTP Client Error Status Block Condition

The module provides a Condition plugin for blocks, checking the status code for 40x range of client errors.

Use this to place a block using a Condition plugin to check the HTTP client error status code.

Therefore, one simple use case would be to display a block on a 404 Not Found page or a 403 Forbidden page.

The supported HTTP Client errors page codes are:
* 401
* 403
* 404

How to use

Install the module.
Go to the Block layout page (/admin/structure/block).
Select Place block for the region you would like the block to appear.
Select the block you want to appear, from the Place block popup.
Under the Visibility conditions, select the vertical tab labelled "HTTP 40x Client error status code".
Select the status code you want the block to appear on.
This can be combined with the other Visibility conditions, such as Pages or Roles.

Versions

8.x-1.x works for all versions of Drupal 8, but not Drupal 9.
8.x-2.x works with Drupal 8.7.7 and higher, including Drupal 9 and 10.
3.0.x works with Drupal 9 and higher, including Drupal 11. I recommend all users to upgrade to this version. You can upgrade from 1.x or 2.x to 3. Version 3.0.0 did support Drupal 8.8.3 but this has been dropped to simplify allowing Drupal 11 support.
3.1.x works with Drupal 10.2 and higher.

Related modules

• Block Visibility Conditions: A module which adds additional block visibility options.