Ant Design: Move Position sub menu to the top of screen

It is possible to move sub menu position to top of the screen. I am using the new menu component. Which way to declare it is to use it, all you have to do is write <Menu mode= {mode} theme={theme} items={items}/>.

Submenu position on default:

And this is my expected condition:

The blue line is menu, and the red line is submenu. The way I did before was to create a new menu and place it at the top of the screen But I think it will be a lot of trouble if you use it that way. So I want to switch ways by moving the sub menu to the top of the screen. Is that really possible to do?

You can always override the ant design css styles to achieve this. The sub menu items are the usual ul & li pair. To display li items in a line we just need to -

ul li{
  display: inline;
}

We can apply the same to ant design menu items & a few tweaks -

.ant-menu-vertical.ant-menu-sub > .ant-menu-item {
  display: inline;
}

.ant-menu-submenu-popup {
  top: 0px !important;
  right: 5% !important;
  left: auto !important;
  width: 400px;
}

Output