/**
* @param HtmlElement $element
* @param bool $left
*
* @return $this|self
*/
public function add(HtmlElement $element, bool $left = true) : self
{
if ($element instanceof Button) {
$element->addClass('navbar-btn');
} elseif ($element instanceof Form) {
$element->addClass('navbar-form');
$element->setInline();
} elseif ($element instanceof HtmlElement && $element->getTag() == '<p>') {
$element->addClass('navbar-text');
} elseif ($element instanceof HtmlElement && $element->getTag() == '<ul>') {
$element->addClass(['nav', 'navbar-nav']);
}
$element->addClass($left ? 'navbar-left' : 'navbar-right');
$this->elements->add($element);
return $this;
}