FluidTYPO3\Vhs\ViewHelpers\Asset\PrefetchViewHelper::build PHP Method

    public function build()
    {
        $domains = $this->arguments['domains'];
        if (false === is_array($domains)) {
            $domains = GeneralUtility::trimExplode(',', $domains, true);
        }
        $headerCode = '';
        if (true === (bool) $this->arguments['force']) {
            $headerCode .= '<meta http-equiv="x-dns-prefetch-control" content="off">' . LF;
        }
        foreach ($domains as $domain) {
            $this->tagBuilder->removeAttribute('href');
            $this->tagBuilder->addAttribute('href', $this->arguments['protocol'] . $this->arguments['protocolSeparator'] . $domain);
            $headerCode .= $this->tagBuilder->render() . LF;
        }
        return $headerCode;
    }