WordPress Admin Ajax Request

wp-admin-ajax.php

<?php
wp_enqueue_script('handler',  'src_url', ['jquery'], '1.0.0', true);
wp_localize_script('handler', 'data', [
	'ajaxUrl' => admin_url('wp-ajax.php'),
	'nonce' => wp_create_nonce('ajax_nonce'),
]);


add_action('wp_ajax_action_name', 'action_name');
add_action('wp_ajax_nopriv_action_name', 'action_name');

function action_name() {
	$nonce = isset($_REQUEST['nonce']) ? $_REQUEST['nonce'] : '';

	if (!wp_verify_nonce($nonce, 'ajax_nonce')) {
		exit('Unauthorized request');
	}

	wp_send_json(['status' => true]);
}

?>

<script>
	jQuery.ajax({
		url: data.ajaxUrl,
		type: 'post', // get
		data: {
			action: 'action_name',
			nonce: data.nonce,
			data: formData,
		},
		dataType: 'json',
		success(data) {
			console.log(data);
		},
		error(req, status, error) {
			console.log([req, status, error]);
		}
	});
</script>