Saved Addresses Trigger Fk checkout Field Change Events

Saved Addresses Trigger Fk checkout Field Change Events

/**
 * Plugin Name: Saved Addresses → Trigger Field Change Events
 * Description: The "Saved Addresses for WooCommerce" plugin auto-fills checkout
 *              address fields via jQuery .val() but never triggers input/change
 *              events. That breaks floating-label libraries (labels stay in
 *              their empty-state position over the filled value), WC's
 *              update_checkout listeners, and any third-party validators bound
 *              to those fields. This snippet listens for the plugin's two AJAX
 *              actions and dispatches input/change/keyup/blur on every populated
 *              billing & shipping field after the response handler finishes.
 * Author:      Custom snippet
 * Version:     1.0.0
 */

defined( 'ABSPATH' ) || exit;

add_action( 'wp_footer', function () {
	if ( ! function_exists( 'is_checkout' ) ) {
		return;
	}
	if ( ! is_checkout() && ! is_account_page() ) {
		return;
	}
	?>
	<script>
	(function ($) {
		if (!$ || !$.fn || !$.fn.ajaxComplete) {
			return;
		}

		var FIELDS = [
			'first_name', 'last_name', 'company',
			'address_1', 'address_2', 'city',
			'postcode', 'state', 'phone', 'email'
		];

		function fireFieldEvents(prefix) {
			$.each(FIELDS, function (_, key) {
				var $el = $('#' + prefix + '_' + key);
				if (!$el.length) {
					return;
				}
				// input → floating-label libs and modern listeners
				// change → WC update_checkout, validators
				// keyup/blur → legacy validators that bind to those
				$el.trigger('input').trigger('change').trigger('keyup').trigger('blur');
			});
		}

		$(document).ajaxComplete(function (event, xhr, settings) {
			var body = '';
			if (typeof settings.data === 'string') {
				body = settings.data;
			} else if (settings.data && typeof settings.data.toString === 'function') {
				body = settings.data.toString();
			}
			if (body.indexOf('action=select_billing_address') === -1
				&& body.indexOf('action=select_shipping_address') === -1) {
				return;
			}

			var prefix = body.indexOf('action=select_shipping_address') !== -1
				? 'shipping'
				: 'billing';

			// Defer past the plugin's own success handler so the values are in
			// place before we dispatch events.
			setTimeout(function () {
				fireFieldEvents(prefix);
				$(document.body).trigger('update_checkout');
			}, 50);
		});
	})(window.jQuery);
	</script>
	<?php
}, 99 );