public function js(array $files, $outputFile)
    {
        if ($this->production) {
            return '<script src="' . $outputFile . '"></script>';
        }

        $this->minify($files, $outputFile, $this->jsMinifiers);

        $scripts = [];

        foreach ($files as $file) {
            $scripts[] = '<script src="' . $file . '"></script>';
        }

        return implode("\n", $scripts);
    }