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✏️ Editing: file-upload.php

<?php

namespace Jet_Form_Builder;

use Jet_Form_Builder\Classes\Instance_Trait;
use Jet_Form_Builder\Classes\Tools;

// If this file is called directly, abort.
if ( ! defined( 'WPINC' ) ) {
	die;
}

/**
 * @method static File_Upload instance()
 *
 * Class description
 *
 * @package   package_name
 * @author    Cherry Team
 * @license   GPL-2.0+
 */
class File_Upload {

use Instance_Trait;

public function get_loader() {
		return '<div class="jet-form-builder-file-upload__loader">' . apply_filters(
			'jet-form-builder/file-upload/loader',
			'<svg xmlns="http://www.w3.org/2000/svg" width="38" height="38" viewBox="0 0 38 38" stroke="#fff"><g fill="none" fill-rule="evenodd"><g transform="translate(1 1)" stroke-width="2"><circle stroke-opacity=".5" cx="18" cy="18" r="18"/><path d="M36 18c0-9.94-8.06-18-18-18" transform="rotate(137.826 18 18)"><animateTransform attributeName="transform" type="rotate" from="0 18 18" to="360 18 18" dur="1s" repeatCount="indefinite"/></path></g></g></svg>'
		) . '</div>';
	}

/**
	 * Register form-specific assets
	 *
	 * @return void
	 */
	public function enqueue_scripts() {
		wp_enqueue_script( 'jet-form-builder-sortable' );
		wp_enqueue_script( 'jet-form-builder-file-upload' );

$messages = wp_json_encode( jet_form_builder()->msg_router->get_manager()->get_messages() );
		$form_id  = (int) Live_Form::instance()->form_id;

wp_add_inline_script(
			'jet-form-builder-file-upload',
			"
			window.JetFormBuilderFileUploadConfig = window.JetFormBuilderFileUploadConfig || {};
			window.JetFormBuilderFileUploadConfig.errors = window.JetFormBuilderFileUploadConfig.errors || {};
			
			window.JetFormBuilderFileUploadConfig.errors[ $form_id ] = $messages;  
		"
		);
	}

}

MR SKB