protected function renderIntoHtml(): string
    {
        $html = \sprintf('<style>%s</style>', $this->dumpAssetsToString('css'));
        $html .= \sprintf('<script type="text/javascript">%s</script>', $this->dumpAssetsToString('js'));

        return $html;
    }
protected function renderIntoHtml(): string
    {
        $html = \sprintf('<style>%s</style>', $this->dumpAssetsToString('css'));
        $html .= \sprintf('<script type="text/javascript">%s</script>', $this->dumpAssetsToString('js'));

        return $html;
    }
protected function renderIntoHtml ( ) : string { $ html = \ sprintf ( '<style>%s</style>' , $ this -> dumpAssetsToString ( 'css' ) ) ; $ html .= \ sprintf ( '<script type="text/javascript">%s</script>' , $ this -> dumpAssetsToString ( 'js' ) ) ; return $ html ; }
Render css and js into html elements.

@return string
Render css and js into html elements .