--- /dev/null
+/**
+ * Implements hook_user_view_alter().
+ */
+function {{ machine_name }}_user_view_alter(&$build) {
+ // Check for the existence of a field added by another module.
+ if (isset($build['an_additional_field'])) {
+ // Change its weight.
+ $build['an_additional_field']['#weight'] = -10;
+ }
+
+ // Add a #post_render callback to act on the rendered HTML of the user.
+ $build['#post_render'][] = 'my_module_user_post_render';
+}