ajax_test_dialog_contents in core/modules/simpletest/tests/ajax_test.module

Menu callback: Returns the contents for dialogs opened by ajax_test_dialog().

filter_admin_format_filter_settings_form_ajax in core/modules/filter/filter.admin.inc

Ajax handler: Opens the dialog to configure a text format filter.

installer_manager_install_modal_callback in core/modules/installer/installer.manager.inc

AJAX callback to update the add/remove queue on bulk add.

layout_ajax_form_open_dialog in core/modules/layout/layout.admin.inc

AJAX handler that opens a form in a dialog.

layout_ajax_form_save_dialog in core/modules/layout/layout.admin.inc

AJAX handler that saves a form in a dialog and updates the underlying form.

layout_ajax_form_save_title_dialog in core/modules/layout/layout.admin.inc

AJAX handler that updates the title.

layout_block_configure_ajax_update in core/modules/layout/layout.admin.inc

AJAX callback to update the underlying layout form after updating a block.

layout_flexible_template_edit_row_ajax in core/modules/layout/layout.flexible.inc

AJAX callback on the submit button for editing a layout row.

views_ajax_error in core/modules/views/includes/ajax.inc

Return an AJAX error.

views_ajax_form_wrapper in core/modules/views/includes/ajax.inc

Wrapper around backdrop_build_form to handle some AJAX stuff automatically. This makes some assumptions about the client.