How to pass JSON response from Controller back to AJAX success method in Laravel 5.4

I have a calling js script

setInterval(function(){

    $.get( "/fetch-data", function( data ) {
        console.log(data);
    });

},1000);

and my Routes look like this

Route::get('/fetch-data', 'PageController@fetchData');

my controller method

public function fetchData()
{
    $results_array = [];
    $file = new \SplFileObject('file.csv');
    $file->setFlags(\SplFileObject::READ_CSV);

    foreach ($file as $row) {
        $results_array[] = $row[0];
        $results_array[] = $row[1];
        $results_array[] = $row[2];
        $results_array[] = $row[3];
         ...
    }
     return response()->json($results_array);
     //$json = response()->json($results_array);
     //return view('view.blade',compact($json));    
}

Note that with return response()->json($results_array); the raw json text is displayed directly on the page. Not what I want.

While return view('view.blade',compact($json)); returns the whole html file. Still not what I want.

What I would like to achieve is that the raw json text that was returned from the controller be pass to the callback from the calling js script.

Any ideas?

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