how to call ajax in wordpress

1function my_enqueue() {
2      wp_enqueue_script( 'ajax-script', get_template_directory_uri() . '/js/my-ajax-script.js', array('jquery') );
3      wp_localize_script( 'ajax-script', 'my_ajax_object', array( 'ajax_url' => admin_url( 'admin-ajax.php' ) ) );
4 }
5 add_action( 'wp_enqueue_scripts', 'my_enqueue' );
6
7//After you can do in js
8jQuery.ajax({
9    type: "post",
10    dataType: "json",
11    url: my_ajax_object.ajax_url,
12    data: formData,
13    success: function(msg){
14        console.log(msg);
15    }
16});