Am I making this ajax request correct?

this is the ajax

JavaScript:

    XF.ajax('GET', XF.canonicalizeUrl('statistics'), ajaxData, function (data) {

        });

here is how I'm accessing in controller, selectedOption is in the ajaxData

PHP:

public function actionIndex(ParameterBag $params) {

 

$selectedOption = $this->filter('selectedOption', 'int');

$viewParams = [

'selectedOption': $selectedOption

];

        return $this->view('mycontroller/action', 'my_template', $viewParams);



}

I'm using {$selectedOption} to access...

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