What should be written in the response (on error) in the controller in ActiveForm?

Question

Yii

Good day,
I developed an ActiveForm form that is called by a popup,
sends data to the controller, where they are processed and everything is done correctly.
But if the error is what to send back to me so that it just selects the desired input, as in client validation.
at the moment I send

return \yii\helpers\Json::encode($model->getErrors());

Answer 1

https://github.com/yiisoft/yii2/blob/master/docs/g...