wordpress ajax url

1<?php
2add_action( 'wp_footer', 'my_ajax_without_file' );
3
4function my_ajax_without_file() { ?>
5
6    <script type="text/javascript" >
7    jQuery(document).ready(function($) {
8
9        ajaxurl = '<?php echo admin_url( 'admin-ajax.php' ) ?>'; // get ajaxurl
10
11        var data = {
12            'action': 'frontend_action_without_file', // your action name 
13            'variable_name': "Some value" // some additional data to send
14        };
15
16        jQuery.ajax({
17            url: ajaxurl, // this will point to admin-ajax.php
18            type: 'POST',
19            data: data,
20            success: function (response) {
21                console.log(response);                
22            }
23        });
24    });
25    </script> 
26    <?php
27}
28
29add_action("wp_ajax_frontend_action_without_file" , "frontend_action_without_file");
30add_action("wp_ajax_nopriv_frontend_action_without_file" , "frontend_action_without_file");
31
32function frontend_action_without_file(){
33    echo json_encode($_POST);
34    wp_die();
35}
36
37?>
38