src/RequestApplication.php
public function getHomeUrl()
    {
        return isset($this->homeUrl) ? $this->homeUrl : Reaction::$app->urlManager->getHomeUrl();
    }
public function getHomeUrl()
    {
        return isset($this->homeUrl) ? $this->homeUrl : Reaction::$app->urlManager->getHomeUrl();
    }
Get app home URL
@return string