WordPress - admin ajax call

// https://codex.wordpress.org/Plugin_API/Action_Reference/admin_footer
function my_admin_add_js() {

	echo '

			<script type="text/javascript">
			    var ajaxurl = "'.admin_url("admin-ajax.php").'";

			    var user_id = '.get_current_user_id().';
			</script>


			<!-- This script should be enqueued properly in the footer -->
			<script>

				

				(function ($) {


					$("a.thickbox1, a.thickbox2").click(function(e) {
						e.preventDefault();


						console.log( ajaxurl );

						$.ajax({
							url 	: ajaxurl,
							type 	: "post",
							data 	: {
								action : "post_love_add_love",
								user_id : user_id
							},
							success : function( response ) {
								alert(response)
							},
							error : function( error ) {
								alert(error)
							}
						});



						alert("open");
					});
				})(jQuery);
			</script>
	';

}
add_action('admin_footer', 'my_admin_add_js');