With Astra Theme version 1.5.0 and above you can set animation for the navigation menus. It adds a style to the menu when the user hovers it.
The settings can be found under Appearance > Customize > Header > Primary Menu > SUB MENU – Container Animation. Following are available options –
Submenu Container Animation:
It applies entry animation to the submenu container when the user hovers the parent menu. Available animation styles are Slide Down, Slide Up, Fade. These animations are available for normal as well as the mega menu. Note that mega menu functionality is available with Astra Pro.
Note: Above options will be available with Astra theme for the primary header. While with Astra Pro Addon plugin above options will be available for Above and Below Header.