simple.php

См. документацию.

<?php
 
namespace Bitrix\Main\Test\Webpacker;
 
use Bitrix\Main\Web\WebPacker;

class Simple
{
    public static function printScript()
    {
        $content = (new WebPacker\Builder())
            ->addExtension('ui.webpacker.example.simple')
            ->stringify();
 
        echo '<script>' . ($content) .  '</script>';
    }
}