/*
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
function that create an ajax post action
it can be "overloaded" with a callback_response and _error
*/
function ajax_post(ajax_data, action, callback_response, callback_error) {
	const data = new FormData();
	data.append('action', action);
	data.append('_ajax_nonce', wp_ajax._nonce);
	data.append('data', ajax_data);

	fetch(wp_ajax._url, {
		method: 'POST',
		credentials: 'same-origin',
		body: data
	})
	.then((response) => response.json())
	.then((data) => {
		if (callback_response)
			callback_response(data);
		else {
			console.log("data: ");
			console.log(data);
		}
	})
	.catch((error) => {
		if (callback_error)
			callback_error(error);
		else {
			console.log("error: ");
			console.log(error);
		}
	});
};