Why does ActiveForm work with $model?

Question

Yii

In the controller we create a $model object and call render(form, ['model' => $model])
And then pass this object and property to the ActiveForm field But why does an ActiveForm need a $model and a property?? After all, it just generates an html input field
<?= $form->field($model, 'name') ?>

Answer 1

The name is taken from the model for the field, the text for the label, as well as the validation rules that will work in JS.