loader.php

См. документацию.

<?php
 
namespace Bitrix\Main\Web\WebPacker;

class Loader
{
    protected $file;
 
    protected $cacheTtl = 60;
 
    protected $skipMoving = false;
 
    protected $tagAttributes = [];

    public function __construct(Output\File $file)
    {
        $this->file = $file;
    }

    public function setCacheTtl($cacheTtl)
    {
        $this->cacheTtl = (int) $cacheTtl;
        return $this;
    }

    public function setSkipMoving($skip)
    {
        $this->skipMoving = (bool) $skip;
        return $this;
    }

    public function setTagAttributes(array $tagAttributes = [])
    {
        $this->tagAttributes = $tagAttributes;
        return $this;
    }

    public function getFileUrl()
    {
        return $this->file->getUri();
    }

    public function getString()
    {
        $content = $this->getStringJs();
        $attributes = $this->tagAttributes;
        if ($this->skipMoving)
        {
            $attributes['data-skip-moving'] = 'true';
        }
        $attrs = '';
        foreach ($attributes as $key => $value)
        {
            $attrs .= " " . htmlspecialcharsbx($key) . '="'
                . htmlspecialcharsbx($value) . '"';
        }
        return <<<EOD
<script{$attrs}>
$content
</script>
EOD;
 
    }

    public function getStringJs()
    {
        $path = $this->file->getUri();
        if (!$path)
        {
            return '';
        }
 
        $ttl = ($this->cacheTtl ?: 1) * 1000;
 
        return
<<<EOD
    (function(w,d,u){
        var s=d.createElement('script');s.async=true;s.src=u+'?'+(Date.now()/$ttl|0);
        var h=d.getElementsByTagName('script')[0];h.parentNode.insertBefore(s,h);
    })(window,document,'$path');
EOD;
 
    }
}