CI4 AJAX Handling

AJAX Requests

if ($this->request->isAJAX()) {
    return $this->response->setJSON($data);
}

// Read JSON body
$json = $this->request->getJSON(true);

// Handle both AJAX and regular requests
public function store() {
    $isAjax = $this->request->isAJAX();
    if (!$this->validate($rules)) {
        if ($isAjax) {
            return $this->response->setStatusCode(422)
                ->setJSON(["errors"=>$this->validator->getErrors()]);
        }
        return redirect()->back()->withInput();
    }
}