Fixed whenClient.

framework/widgets/ActiveField.php

@@ -673,10 +673,10 @@ class ActiveField extends Component
             foreach ($this->model->getActiveValidators($attribute) as $validator) {
                 /** @var \yii\validators\Validator $validator */
                 $js = $validator->clientValidateAttribute($this->model, $attribute, $this->form->getView());
+                if ($validator->enableClientValidation && $js != '') {
                     if ($validator->whenClient !== null) {
                         $js = "if ({$validator->whenClient}(attribute, value)) { $js }";
                     }
-                if ($validator->enableClientValidation && $js != '') {
                     $validators[] = $js;
                 }
             }