A navigation menu or nav link is a list of links pointing to important areas of the website. They are usually presented as a horizontal bar of links at the top of every page on the website. Navigation menus give your site structure and help visitors find your content what they're looking for.
At first, on the webpage, there is only a 3 lines-bar Menu Button, and when clicked on that menu button then these list items smoothly sliding down and appear. I also add the hover effect on Menu item lists. When you hover on the specific item, there is a cool inset box-shadow shown as you can see in the image.
You can download the source code files through the given link. Click here to download source code files.