[WordPress Ajax Form Submission] #WordPress

functions.php

 function add_theme_scripts()
 {
     wp_enqueue_style('style', get_stylesheet_uri(), array(), time());
     wp_enqueue_style('jquery-ui', '//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css');
     wp_enqueue_script('scripts', get_theme_file_uri() . '/scripts.js', array( 'jquery-ui-tabs' ), time(), true);

     wp_localize_script('scripts', 'settings', array(
        'ajaxurl'    => admin_url('admin-ajax.php'),
        ));
 }
 add_action('wp_enqueue_scripts', 'add_theme_scripts');

function ass_declaration_action()
{
    $nonce = $_POST['ass_declartion_nonce'];

    if (! wp_verify_nonce($nonce, 'ass_declaration_action')) {
        die('Busted!');
    }

        
    echo json_encode($_POST);
    die();
}

add_action('wp_ajax_ass_declaration_action', 'ass_declaration_action');
add_action('wp_ajax_nopriv_ass_declaration_action', 'ass_declaration_action'); // not really needed

function candidateFeedback_func( $atts ) {
  	
    $return .= '<input type="hidden" name="action" value="ass_declaration_action"/>';
    $return .= wp_nonce_field('ass_declaration_action', 'ass_declartion_nonce');
	
    return $return;
}
add_shortcode( 'candidateFeedback', 'candidateFeedback_func' );

scripts.js

	$('#declaration').submit(function(e) {
		e.preventDefault();
		var formData = $(this).serialize();
		console.log(formData);

		$.ajax({
			type: "POST",
			url: settings.ajaxurl,
			data: formData,
			success: function(data) {
				console.log(data);
			},
			error: function(data) {
				console.warn(data);
			}
		});

	});