<?Php Namespace app\controllers; use yii\filters\Cors; trait CorsExt { public function actions()

{
$actions = parent::actions();
$actions['options'] = [
'class' => 'yii\rest\OptionsAction',
];
return $actions;
}

/**
* @return array|array[]
*/
public function behaviors(): array {
$behaviors = parent::behaviors();

$behaviors['corsFilter'] = [
'class' => Cors::class,
'cors' => [
'Origin' => ['*'],
'Access-Control-Request-Method' => ['GET', 'POST', 'PUT', 'PATCH', 'DELETE', 'HEAD', 'OPTIONS'],
'Access-Control-Request-Headers' => ['*']
]
];

return $behaviors;
}
}

Рабочий вариант да?