6 files declare their use of AlertCommand in Drupal 9
- AjaxCommandsTest.php in core/
tests/ Drupal/ Tests/ Core/ Ajax/ AjaxCommandsTest.php - AjaxRenderer.php in core/
lib/ Drupal/ Core/ Render/ MainContent/ AjaxRenderer.php - AjaxTestController.php in core/
modules/ system/ tests/ modules/ ajax_test/ src/ Controller/ AjaxTestController.php - ajax_forms_test.module in core/
modules/ system/ tests/ modules/ ajax_forms_test/ ajax_forms_test.module - Simpletest mock module for Ajax forms testing.
- FormAjaxResponseBuilderTest.php in core/
tests/ Drupal/ Tests/ Core/ Form/ FormAjaxResponseBuilderTest.php - FrameworkTest.php in core/
modules/ system/ tests/ src/ Functional/ Ajax/ FrameworkTest.php