CodeIgniter ajax link not found - php

Question

I'm having an issue with getting data from Controller, I have tried all the solutions here but it's the same..
when I click on the button it says 404 not found, if I change the URL to completed URL included the controller class name + function name, it says 403
Here is my view code :
<h2>Quiz</h2>
<script type="text/javascript">
$(document).ready(function(){
var BASE_URL = '<?php echo base_url(); ?>';
$('#show').click(function(e){
console.log(BASE_URL);
$.ajax({
url: BASE_URL + "Quiz/get_item",
dataType:'text',
type:"POST",
success: function(result){
var obj = $.parseJSON(result);
console.log(obj);
}
})
})
});
</script>
<button id="show">Show Cutomers</button>
<div id="customers-list"></div>
<p>Our first multi-page CodeIgniter application! Each page has its own controller and view!</p>
Here is my Controller code :
<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class Quiz extends CI_Controller {
var $TPL;
public function __construct()
{
parent::__construct();
$this->load->model('Quiz_data');
// Your own constructor code
}
function show_customers()
{
$query = $this->db-> query("SELECT * FROM quiz ORDER BY id;");
$this->TPL['listing'] = $query->result_array();
$this->template->show('quiz', $this->TPL);
}
public function index()
{
$this->template->show('quiz', $this->TPL);
}
public function get_item(){
$data = $this ->Quiz_data->get_data();
echo json_encode($data);
}
}
Here is my Model code :
<?php
class Quiz_data extends CI_Model {
public function get_data()
{
$query = $this->db->get('quiz');
return $query -> result_array();
}
}

Answer 1

What is the output of
console.log(BASE_URL);
Didnt mess with CI for quite a while, but it used to need /index.php/ in the URL. Try:
url: BASE_URL + "/index.php/quiz/get_item",
Although the controller-name needs to start with a capital, it doesnt need to be called that way in the URL.

Answer 2

Make sure url: BASE_URL + "Quiz/get_item" provides the correct URL.
var BASE_URL = '<?php echo base_url(); ?>'; May not provide trailing slash and you won't get correct url.
Try updating your call with following:
url: BASE_URL + "/Quiz/get_item",